EP0035069A1 - Memory alloy based on Cu-Al or on Cu-Al-Ni and process for the stabilisation of the two-way effect - Google Patents

Memory alloy based on Cu-Al or on Cu-Al-Ni and process for the stabilisation of the two-way effect Download PDF

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EP0035069A1
EP0035069A1 EP19800200183 EP80200183A EP0035069A1 EP 0035069 A1 EP0035069 A1 EP 0035069A1 EP 19800200183 EP19800200183 EP 19800200183 EP 80200183 A EP80200183 A EP 80200183A EP 0035069 A1 EP0035069 A1 EP 0035069A1
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Prior art keywords
temperature
memory alloy
shape memory
way effect
temperature range
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EP0035069B1 (en
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Keith Dr. Melton
Olivier Dr. Mercier
Helmut Dr. Riegger
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BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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Priority to DE8080200183T priority patent/DE3065930D1/en
Priority to PT7259081A priority patent/PT72590B/en
Priority to JP2850381A priority patent/JPS56136945A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/006—Resulting in heat recoverable alloys with a memory effect

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  • the invention is based on a shape memory alloy according to the preamble of claim 1 and on a method for stabilizing the two-way effect according to the preamble of claims 6 and 7.
  • these alloys show a clear memory effect compared to the known Ni / Ti alloys in a temperature range of more than 100 ° C (which is particularly interesting for temperature monitoring devices and overcurrent switches), they are metastable. This means that they are subject to phase changes due to diffusion in the desired temperature range. At the response temperature or just above it, the high-temperature ⁇ phase changes and the memory effect is lost.
  • the invention is based on the object of specifying aging-resistant memory alloys of the Cu / Al or Cu / Al / Ni type at temperatures of over 100 ° C. and a method for their production or stabilization of the two-way effect.
  • the method of stabilization consists essentially in a heat treatment of the alloy in the cast or hot-kneaded state after the last annealing in the ⁇ mixed-crystal region in the temperature range from 600 to 950 ° C. (5 to 60 min) and before the induction of the two-way effect.
  • the heat treatment is an annealing in the temperature range of 200 to 350 ° C, which can in principle be carried out in two ways. In a first process, the alloy is after the last annealing in the ⁇ mixed crystal region quenched to room temperature and then tempered for 0.1 to 10 h in the temperature range from 200 to 350 ° C.
  • the alloy is quenched after the last annealing from the / 3 mixed crystal region directly into an oil, salt, metal or sand bath at 250 to 350 ° C., held here for 0.5 to 10 minutes and finally on the air cooled to room temperature.
  • this heat treatment is followed by a deformation of 1 to 6% in the range from 30 ° C. above to 50 ° C. below the point of the martensitic transformation M S in order to induce the two-way memory effect.
  • the method extends to the entire alloy group of the ⁇ -type Cu / Al and Cu / Al / Ni, in particular to alloys with 10 to 15% by weight aluminum, 0 to 6% by weight nickel, the rest copper.
  • the nickel can be partially or completely replaced by manganese, iron, cobalt or a mixture of at least two of these elements. Alloys produced by this process are resistant to aging up to 300 C, i.e. they mainly consist of the ⁇ high-temperature phase and show a stable two-way effect.
  • Exemplary embodiment I (explanation of the prior art) An alloy of the following composition was used as the starting material:
  • the alloy was produced by melt metallurgy, cast into an ingot and then thermoformed at 700 ° C in such a way that a rod with a diameter of 10 mm was created. The rod was then subjected to annealing in the ⁇ mixed-crystal region for 10 min at 750 ° C. and quenched in water. Torsion samples with a total measuring length of 40 mm and a measuring length of 22 mm with a diameter of 3 mm were worked out from the rod.
  • the two-way effect was induced by subjecting the samples to torsional stress in the vicinity of the martensitic transformation point M S (150 ° C.) in such a way that the torsional strain was gradually increased to 4 to 5% while simultaneously going through a heating / cooling cycle .
  • the samples were then annealed at a temperature of 300 ° C. for 1 h. The review showed that the memory effect had completely disappeared.
  • the invention is not limited to the examples above. In principle, the method can be applied to all ⁇ -copper alloys of this type.
  • Another cheap alloy has the following composition:
  • the level of the transition temperature M S can obviously be strongly influenced by small variations in the aluminum content.
  • the above-mentioned substitutes manganese, iron, cobalt can also be used.
  • the method according to the invention creates memory alloys which exceed those in electro technology and in many industrial and household applications, the usual range of temperature monitoring are resistant to aging and show a stable two-way effect. This closes a previously existing gap in surveillance technology.

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Abstract

1. Memory alloy of the Cu/Al or Cu/Al/Ni type, characterised in that it is non-aging up to a temperature of 300 degrees C, consists predominantly of the beta-high temperature phase and shows a stable two-way effect in the temperature range form 100 to 250 degrees C.

Description

Die Erfindung geht aus von einer Formgedächtnislegierung nach der Gattung des Anspruchs 1 und von einem Verfahren zur Stabilisierung des Zweiwegeffektes nach der Gattung der Ansprüche 6 und 7.The invention is based on a shape memory alloy according to the preamble of claim 1 and on a method for stabilizing the two-way effect according to the preamble of claims 6 and 7.

Kupferreiche Formgedächtnislegierungen, welche eine zur martensitischen Umwandlung befähigteβ-Phase (β-Messing-Typ) aufweisen, sind seit längerer Zeit bekannt z.B. aus:

  • R. Haynes, Some Observations on Isothermal Transformations of Eutectoid Aluminium Bronzes Below Their MS Temperatures, Journal of the Institute of Metals 1954-55, Vol. 83, Seiten 357-358; W.A. Rachinger, A "super-elastic" single crystal calibration bar, British Journal of Applied Physics, Vol. 9, Juni 1958, Seiten 250-252; R.P. Jewett, D.J. Mack, Further Investigation of Copper-Aluminium Alloys in the Temperature Range below the β
    Figure imgb0001
    α + γ2 Eutectoid, Journal of the Institute of Metals 1963-64, Vcl 92, Seiten 59-61; K. Otsuka and K. Shimizu, Memory Effect and Thermoelastic Martensite Transformation in Cu-Al-Ni Alloy, Scripta Metallurgia, Vol. 4, 1970 Pergamon Press Inc., Seiten 469-472; Kazuhiro Otsuka, Origin of Memory Effect in Cu-Al-Ni Alloy, Japanese Journal of Applied Physics, Vol. 10, No. 5, May 1971, Seiten 571-579.
Copper-rich shape memory alloys which have a β-phase (β-brass type) capable of martensitic transformation have been known for a long time, for example from:
  • R. Haynes, Some Observations on Isothermal Transformations of Eutectoid Aluminum Bronzes Below Their MS Temperatures, Journal of the Institute of Metals 1954-55, Vol. 83, pp. 357-358; WA Rachinger, A "super-elastic" single crystal calibration bar, British Journal of Applied Physics, Vol. 9, June 1958, pages 250-252; RP Jewett, DJ Mack, Further Investigation of Copper-Aluminum Alloys in the Temperature Range below the β
    Figure imgb0001
    α + γ 2 Eutectoid, Journal of the Institute of Metals 1963-64, Vcl 92, pages 59-61; K. Otsuka and K. Shimizu, Memory Effect and Thermoelastic Martensite Transformation in Cu-Al-Ni Alloy, Scripta Metallurgia, Vol. 4, 1970 Pergamon Press Inc., pages 469-472; Kazuhiro Otsuka, Origin of Memory Effect in Cu-Al-Ni Alloy, Japanese Journal of Applied Physics, Vol. 10, No. 5, May 1971, pages 571-579.

Diese Legierungen zeigen zwar in einem über der Raumtemperatur liegenden Temperaturbereich von mehr als 100 °C (was für Temperaturüberwachungsgeräte und Ueberstromschalter besonders interessant ist) gegenüber den ebenfalls bekannten Ni/Ti-Legierungen einen deutlichen Gedächtniseffekt, sind aber metastabil. Das heisst, dass sie im gewünschten Temperaturbereich diffusionsbedingten Phasenumwandlungen unterworfen sind. Bei der Ansprechtemperatur oder knapp oberhalb derselben wandelt sich die Hochtemperatur-β-Phase um und der Gedächtniseffekt geht verloren.Although these alloys show a clear memory effect compared to the known Ni / Ti alloys in a temperature range of more than 100 ° C (which is particularly interesting for temperature monitoring devices and overcurrent switches), they are metastable. This means that they are subject to phase changes due to diffusion in the desired temperature range. At the response temperature or just above it, the high-temperature β phase changes and the memory effect is lost.

Der Erfindung liegt die Aufgabe zugrunde, bei Temperaturen von über 100 C alterungsbeständige Gedächtnislegierungen des Cu/Al- oder Cu/Al/Ni Typs sowie ein Verfahren zu deren Herstellung bzw. Stabilisierung des Zweiwegeffeks anzugeben.The invention is based on the object of specifying aging-resistant memory alloys of the Cu / Al or Cu / Al / Ni type at temperatures of over 100 ° C. and a method for their production or stabilization of the two-way effect.

Diese Aufgabe wird erfindungsgemäss durch die Merkmale der Ansprüche 1, 6 und 7 gelöst.According to the invention, this object is achieved by the features of claims 1, 6 and 7.

Das Verfahren der Stabilisierung besteht im wesentlichen in einer Wärmebehandlung der im gegossenen oder warmgekneteten Zustand vorliegenden Legierung nach der letzten im β -Mischkristallgebiet liegenden Glühung im Temperaturbereich von 600 bis 950 OC (5 bis 60 min) und vor der Induzierung des Zweiwegeffektes. Die Wärmebehandlung stellt eine Glühung im Temperaturbereich von 200 bis 350 °C dar, welche prinzipiell auf zwei Arten durchgeführt werden kann. In einem ersten Verfahren wird die Legierung nach der letzten Glühung im β-Mischkristallgebiet auf Raumtemperatur abgeschreckt und anschliessend während 0,1 bis 10 h im Temperaturbereich von 200 bis 350 °C angelassen. In einem zweiten Verfahren wird die Legierung nach der letzten Glühung aus dem/3 -Mischkristallgebiet direkt in ein Oel-, Salz-, Metall- oder Sandbad von 250 bis 350 °C abgeschreckt, hier während 0,5 bis 10 min gehalten und schliesslich an der Luft auf Raumtemperatur abgekühlt. In beiden Fällen folgt auf diese Wärmebehandlung eine Verformung von 1 bis 6 % im Bereich von 30°C oberhalb bis 50 °C unterhalb des Punktes der martensitischen Umwandlung MS zwecks Induzierung des Zweiweg-Gedächtniseffektes.The method of stabilization consists essentially in a heat treatment of the alloy in the cast or hot-kneaded state after the last annealing in the β mixed-crystal region in the temperature range from 600 to 950 ° C. (5 to 60 min) and before the induction of the two-way effect. The heat treatment is an annealing in the temperature range of 200 to 350 ° C, which can in principle be carried out in two ways. In a first process, the alloy is after the last annealing in the β mixed crystal region quenched to room temperature and then tempered for 0.1 to 10 h in the temperature range from 200 to 350 ° C. In a second process, the alloy is quenched after the last annealing from the / 3 mixed crystal region directly into an oil, salt, metal or sand bath at 250 to 350 ° C., held here for 0.5 to 10 minutes and finally on the air cooled to room temperature. In both cases, this heat treatment is followed by a deformation of 1 to 6% in the range from 30 ° C. above to 50 ° C. below the point of the martensitic transformation M S in order to induce the two-way memory effect.

Das Verfahren erstreckt sich auf die gesamte Legierungsgruppe des β -Typs Cu/Al und Cu/Al/Ni, insbesondere auf Legierungen mit 10 bis 15 Gew.-% Aluminium, 0 bis 6 Gew.-% Nickel, Rest Kupfer. Dabei kann das Nickel teilweise oder vollständig durch Mangan, Eisen, Kobalt oder eine Mischung von mindestens zweier dieser Elemente ersetzt sein. Nach diesem Verfahren hergestellte Legierungen sind bis zu 300 C alterungsbeständig, d.h. sie bestehen vorwiegend aus der β -Hochtemperaturphase und zeigen einen stabilen Zweiwegeffekt.The method extends to the entire alloy group of the β-type Cu / Al and Cu / Al / Ni, in particular to alloys with 10 to 15% by weight aluminum, 0 to 6% by weight nickel, the rest copper. The nickel can be partially or completely replaced by manganese, iron, cobalt or a mixture of at least two of these elements. Alloys produced by this process are resistant to aging up to 300 C, i.e. they mainly consist of the β high-temperature phase and show a stable two-way effect.

Die Erfindung wird anhand der nachfolgenden Ausführungsbeispiele beschrieben.The invention is described on the basis of the following exemplary embodiments.

Ausführungsbeispel I (Erläuterung des Standes der Technik) Als Ausgangsmaterial diente eine Legierung der nachfolgenden Zusammensetzung:

Figure imgb0002
Exemplary embodiment I (explanation of the prior art) An alloy of the following composition was used as the starting material:
Figure imgb0002

Die Legierung wurde schmelzmetallurgisch hergestellt, zu einem Barren vergossen und anschliessend bei 700 °C derart warmverformt, dass ein Stab von 10 mm Durchmesser entstand. Anschliessend wurde der Stab einer Glühung im β-Mischkristallgebiet von 10 min bei 750 °C unterworfen und in Wasser abgeschreckt. Aus dem Stab wurden Torsionsproben von 40 mm totaler und 22 mm Messlänge bei 3 mm Durchmesser herausgearbeitet. Der Zweiwegeffekt wurde dadurch induziert, dass die Proben einer Torsionsbeanspruchung in der Nähe des martensitischen Umwandlungspunktes MS (150 °C) derart unterworfen wurden, dass die Torsionsdehnung stufenweise bis'auf 4 bis 5 % erhöht wurde bei gleichzeitigem Durchlaufen eines Erwärmungs/Abkühlungs-Zyklus. Hierauf wurden die Proben während 1 h bei einer Temperatur von 300 °C geglüht. Die Nachprüfung ergab, dass der Gedächtniseffekt völlig verschwunden war.The alloy was produced by melt metallurgy, cast into an ingot and then thermoformed at 700 ° C in such a way that a rod with a diameter of 10 mm was created. The rod was then subjected to annealing in the β mixed-crystal region for 10 min at 750 ° C. and quenched in water. Torsion samples with a total measuring length of 40 mm and a measuring length of 22 mm with a diameter of 3 mm were worked out from the rod. The two-way effect was induced by subjecting the samples to torsional stress in the vicinity of the martensitic transformation point M S (150 ° C.) in such a way that the torsional strain was gradually increased to 4 to 5% while simultaneously going through a heating / cooling cycle . The samples were then annealed at a temperature of 300 ° C. for 1 h. The review showed that the memory effect had completely disappeared.

Ausführungsbeispiel II:

  • Eine Legierung gemäss Beispiel 1 wurde geschmolzen, gegossen, warmverformt, geglüht und in Wasser abgeschreckt. Der erhaltene Stab wurde dann zusätzlich während 3 h bei 300 °C angelassen. Nach dem Herausarbeiten der Proben gemäss Beispiel I wurde der Zweiwegeffekt in der gleichen Weise induziert. Nach einem zusätzlichen Glühen der Proben während 8 h bei 300 °C hatte der Zweiwegeffekt noch in keiner Weise nachgelassen. Selbst nach einer Glühdauer von 500 h bei 300 °C war immer noch ein Zweiwegeffekt - wenn auch schwächer - nachweisbar.
Working example II:
  • An alloy according to Example 1 was melted, cast, hot worked, annealed and quenched in water. The rod obtained was then additionally tempered at 300 ° C. for 3 hours. After working out the samples according to Example I, the two-way effect was induced in the same way. After an additional annealing of the samples for 8 hours at 300 ° C, the two-way effect had not subsided in any way. Even after an annealing time of 500 h at 300 ° C there was still a two-way effect - albeit weaker - detectable.

Ausführungsbeispiel III:

  • Eine Legierung gemäss Beispiel I wurde geschmolzen, gegossen und zu einem Stab von 10 mm Durchmesser warmverformt. Aus diesem Stab wurde durch Warmwalzen ein Band von 1,5 mm Dicke und 10 mm Breite hergestellt. Daraus wurden Biegeproben von 60 mm Länge geschnitten und der üblichen Glühung während 10 min bei 750 °C unterworfen. Hierauf wurden die Proben direkt in ein Salzbad von 300 °C abgeschreckt, während 2 min auf dieser Temperatur gehalten und dann in Luft abgekühlt. Während des Abkühlvorganges wurden die Proben um einen Winkel von 90 °C gebogen, wodurch der Zweiwegeffekt induziert wurde. Nach mehrstündiger Erhitzung auf 300 C konnte der Effekt in unverminderter Grösse nachgewiesen werden.
Working example III:
  • An alloy according to Example I was melted, cast and thermoformed into a 10 mm diameter rod. A strip 1.5 mm thick and 10 mm wide was produced from this rod by hot rolling. Bending samples of 60 mm in length were cut from this and subjected to the usual annealing at 750 ° C. for 10 minutes. The samples were then quenched directly into a salt bath at 300 ° C., held at this temperature for 2 minutes and then cooled in air. During the cooling process, the samples were bent through an angle of 90 ° C, which induced the two-way effect. After heating to 300 C for several hours, the effect could be demonstrated in undiminished size.

Die Erfindung ist nicht auf die vorstehenden Beispiele beschränkt. Das Verfahren kann prinzipiell auf alle β-Kupferlegierungen dieses Typs angewendet werden. Eine weitere günstige Legierung hat folgende Zusammensetzung:

Figure imgb0003
The invention is not limited to the examples above. In principle, the method can be applied to all β-copper alloys of this type. Another cheap alloy has the following composition:
Figure imgb0003

Es zeigt sich, dass die Höhe der Umwandlungstemperatur MS offenbar durch geringe Variationen im Aluminiumgehalt stark beeinflusst werden kann. Weitere Beeinflussungen sind durch die oben erwähnten Substitute Mangan, Eisen, Kobalt möglich.It turns out that the level of the transition temperature M S can obviously be strongly influenced by small variations in the aluminum content. The above-mentioned substitutes manganese, iron, cobalt can also be used.

Durch das erfindungsgemässe Verfahren wurden Gedächtnislegierungen geschaffen, welche bis über den in der Elektrotechnik und in vielen industriellen und Haushaltsanwendungen üblichen Bereich der Temperaturüberwachung hinaus alterungsbeständig sind und einen stabilen Zweiwegeffekt zeigen. Damit schliessen sie eine bisher vorhandene Lücke in der Ueberwachungstechnik.The method according to the invention creates memory alloys which exceed those in electro technology and in many industrial and household applications, the usual range of temperature monitoring are resistant to aging and show a stable two-way effect. This closes a previously existing gap in surveillance technology.

Claims (7)

1. Formgedächtnislegierung auf der Basis von Cu/Al oder Cu/Al/Ni, dadurch gekennzeichnet, dass sie bis zu einer Temperatur von 300 °C alterungsbeständig ist, vorwiegend aus der β-Hochtemperaturphase besteht und im Temperaturbereich von 100 bis 250 °C einen stabilen Zweiwegeffekt zeigt.1. Shape memory alloy based on Cu / Al or Cu / Al / Ni, characterized in that it is resistant to aging up to a temperature of 300 ° C, mainly consists of the β-high temperature phase and in the temperature range of 100 to 250 ° C one shows stable two-way effect. 2. Formgedächtnislegierung nach Anspruch 1, dadurch gekennzeichnet, dass sie aus 10 bis 15 Gew.-% Aluminium, 0 bis 6 Gew.-% Nickel, Rest Kupfer besteht.2. Shape memory alloy according to claim 1, characterized in that it consists of 10 to 15 wt .-% aluminum, 0 to 6 wt .-% nickel, the rest copper. 3. Formgedächtnislegierung nach Anspruch 2, dadurch gekennzeichnet, dass sie aus 13,25 Gew.-% Aluminium, 3 Gew.-% Nickel, Rest Kupfer besteht.3. shape memory alloy according to claim 2, characterized in that it consists of 13.25 wt .-% aluminum, 3 wt .-% nickel, the rest copper. 4. Formgedächtnislegierung nach Anspruch 2, dadurch gekennzeichnet, dass sie aus 13 Gew.-% Aluminium, 3 Gew.-% Nickel, Rest Kupfer besteht.4. shape memory alloy according to claim 2, characterized in that it consists of 13 wt .-% aluminum, 3 wt .-% nickel, the rest copper. 5. Formgedächtnislegierung nach Anspruch 1, dadurch gekennzeichnet, dass das Nickel zum Teil oder vollständig durch mindestens eines der Elemente Mangan, Eisen, Kobalt ersetzt ist.5. shape memory alloy according to claim 1, characterized in that the nickel is partially or completely replaced by at least one of the elements manganese, iron, cobalt. 6. Verfahren zur Stabilisierung des Zweiwegeffektes bis zu einer Temperatur von 300 °C einer Formgedächtnislegierung auf der Basis von Cu/Al oder Cu/Al/Ni, welche im gegossenen oder warmgekneteten Ausgangszustand vorliegen kann, dadurch gekennzeichnet, dass die Legierung zunächst.während 5 bis 60 min im Temperaturbereich zwischen 600 und 950 °C geglüht, in Wasser abgeschreckt und während 0,1 bis 10 h bei einer Temperatur von 200 bis 350 °C angelassen und schliesslich zur Induzierung des Zweiwegeffektes im Temperaturbereich von 30 °C oberhalb bis 50 °C unterhalb des Umwandlungspunktes MS um einen Betrag von 1 bis 6 % verformt wird.6. A method for stabilizing the two-way effect up to a temperature of 300 ° C of a shape memory alloy based on Cu / Al or Cu / Al / Ni, which can be in the cast or hot-kneaded initial state, characterized in that the alloy initially. During 5 annealed for up to 60 min in the temperature range between 600 and 950 ° C, quenched in water and tempered for 0.1 to 10 h at a temperature of 200 to 350 ° C and finally to induce the two-way effect in the temperature range of 30 ° C above to 50 ° C is deformed below the transition point M S by an amount of 1 to 6%. 7. Verfahren zur Stabilisierung des Zweiwegeffektes bis zu einer Temperatur von 300 °C einer Formgedächtnislegierung auf der Basis von Cu/Al/Ni, welche im gegossenen oder warmgekneteten Ausgangszustand vorliegen kann, dadurch gekennzeichnet, dass die Legierung zunächst während 5 bis 60 min im Temperaturbereich zwischen 600 und 950 °C gegüht, in ein Metall-, Salz-, Oel-oder Sandbad auf eine Temperatur zwischen 250 und 350 °C abgeschreckt, auf dieser Temperatur während 0,5 bis 10 min gehalten und dann an der Luft auf Raumtemperatur abgekühlt und schliesslich zur Induzierung des Zweiwegeffektes im Temperaturbereich von 30 °C oberhalb bis 50 °C unterhalb des Umwandlungspunktes MS um einen Betrag von 1 bis 6 % verformt wird.7. A method for stabilizing the two-way effect up to a temperature of 300 ° C of a shape memory alloy based on Cu / Al / Ni, which can be in the cast or hot-kneaded initial state, characterized in that the alloy initially in the temperature range for 5 to 60 min annealed between 600 and 950 ° C, quenched in a metal, salt, oil or sand bath to a temperature between 250 and 350 ° C, held at this temperature for 0.5 to 10 min and then cooled in air to room temperature and finally to induce the two-way effect in the temperature range from 30 ° C above to 50 ° C below the transformation point M S by an amount of 1 to 6%.
EP19800200183 1980-03-03 1980-03-03 Memory alloy based on cu-al or on cu-al-ni and process for the stabilisation of the two-way effect Expired EP0035069B1 (en)

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EP19800200183 EP0035069B1 (en) 1980-03-03 1980-03-03 Memory alloy based on cu-al or on cu-al-ni and process for the stabilisation of the two-way effect
DE8080200183T DE3065930D1 (en) 1980-03-03 1980-03-03 Memory alloy based on cu-al or on cu-al-ni and process for the stabilisation of the two-way effect
PT7259081A PT72590B (en) 1980-03-03 1981-02-27 RESIN BLEND
JP2850381A JPS56136945A (en) 1980-03-03 1981-03-02 Shaped memory alloy based on cu al or cu al ni and stabilization of said alloy in two-direction effect

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086014A1 (en) * 1982-02-05 1983-08-17 BBC Brown Boveri AG Method for the production and stabilisation of a reversible two-way memory effect in a Cu-Al-Ni or Cu-Al alloy
US4533411A (en) * 1983-11-15 1985-08-06 Raychem Corporation Method of processing nickel-titanium-base shape-memory alloys and structure
US4634477A (en) * 1984-07-20 1987-01-06 Kabushiki Kaisha Kobe Seiko Sho Workable high strength shape memory alloy
EP0209466A2 (en) * 1985-07-19 1987-01-21 Souriau Et Cie Device for sequential mechanical triggering
US4654092A (en) * 1983-11-15 1987-03-31 Raychem Corporation Nickel-titanium-base shape-memory alloy composite structure
EP0297004A2 (en) * 1987-06-24 1988-12-28 CEZUS Compagnie Européenne du Zirconium Use of a Process for improving the ductility of a product made from a martensitic transformation alloy
FR2618163A1 (en) * 1987-07-15 1989-01-20 Trefimetaux Process for education of an article made of alloy with shape memory, making it possible to ensure the precision and the stability of the reversible memory effect
EP0382109A1 (en) * 1989-02-08 1990-08-16 Nivarox-FAR S.A. Process for treating a work piece made from a metallic shape memory alloy offering two states of reversible shape memory
FR2643086A1 (en) * 1989-02-10 1990-08-17 Nivarox Sa Process for conditioning a component made of metal alloy with shape memory exhibiting two reversible shape memory states
US5066341A (en) * 1989-02-08 1991-11-19 Nivarox-Far S. A. Method of conditioning an article of shape memory metallic alloy having two reversible shape memory states

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CN108384984B (en) * 2018-04-09 2020-01-03 天津理工大学 Preparation method of low-cost high-temperature shape memory alloy

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Cited By (14)

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Publication number Priority date Publication date Assignee Title
EP0086014A1 (en) * 1982-02-05 1983-08-17 BBC Brown Boveri AG Method for the production and stabilisation of a reversible two-way memory effect in a Cu-Al-Ni or Cu-Al alloy
US4654092A (en) * 1983-11-15 1987-03-31 Raychem Corporation Nickel-titanium-base shape-memory alloy composite structure
US4533411A (en) * 1983-11-15 1985-08-06 Raychem Corporation Method of processing nickel-titanium-base shape-memory alloys and structure
US4634477A (en) * 1984-07-20 1987-01-06 Kabushiki Kaisha Kobe Seiko Sho Workable high strength shape memory alloy
EP0209466A3 (en) * 1985-07-19 1987-09-02 Souriau Et Cie Mechanical device for sequential triggering
FR2590048A1 (en) * 1985-07-19 1987-05-15 Souriau & Cie SEQUENTIAL MECHANICAL RELEASE DEVICE
EP0209466A2 (en) * 1985-07-19 1987-01-21 Souriau Et Cie Device for sequential mechanical triggering
EP0297004A2 (en) * 1987-06-24 1988-12-28 CEZUS Compagnie Européenne du Zirconium Use of a Process for improving the ductility of a product made from a martensitic transformation alloy
FR2617187A1 (en) * 1987-06-24 1988-12-30 Cezus Co Europ Zirconium PROCESS FOR IMPROVING THE DUCTILITY OF A MARTENSITIC PROCESSING ALLOY PRODUCT AND USE THEREOF
EP0297004A3 (en) * 1987-06-24 1989-06-28 Cezus Compagnie Europeenne Du Zirconium Process for improving the ductility of a product made from a martensitic transformation alloy and the use thereof
FR2618163A1 (en) * 1987-07-15 1989-01-20 Trefimetaux Process for education of an article made of alloy with shape memory, making it possible to ensure the precision and the stability of the reversible memory effect
EP0382109A1 (en) * 1989-02-08 1990-08-16 Nivarox-FAR S.A. Process for treating a work piece made from a metallic shape memory alloy offering two states of reversible shape memory
US5066341A (en) * 1989-02-08 1991-11-19 Nivarox-Far S. A. Method of conditioning an article of shape memory metallic alloy having two reversible shape memory states
FR2643086A1 (en) * 1989-02-10 1990-08-17 Nivarox Sa Process for conditioning a component made of metal alloy with shape memory exhibiting two reversible shape memory states

Also Published As

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PT72590A (en) 1981-03-01
JPH0138867B2 (en) 1989-08-16
PT72590B (en) 1982-02-12
EP0035069B1 (en) 1983-12-21
DE3065930D1 (en) 1984-01-26
JPS56136945A (en) 1981-10-26

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