EP0035069B1 - 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 PDFInfo
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- EP0035069B1 EP0035069B1 EP19800200183 EP80200183A EP0035069B1 EP 0035069 B1 EP0035069 B1 EP 0035069B1 EP 19800200183 EP19800200183 EP 19800200183 EP 80200183 A EP80200183 A EP 80200183A EP 0035069 B1 EP0035069 B1 EP 0035069B1
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- temperature
- memory alloy
- way effect
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- 230000000694 effects Effects 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 13
- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims description 10
- 230000006641 stabilisation Effects 0.000 title description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 19
- 239000000956 alloy Substances 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 3
- 230000001939 inductive effect Effects 0.000 claims 2
- 230000003019 stabilising effect Effects 0.000 claims 2
- 238000000137 annealing Methods 0.000 description 8
- 230000003446 memory effect Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000730 Beta brass Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
Definitions
- 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.
- Copper-rich shape memory alloys which have a ⁇ -phase ( ⁇ -brass type) capable of martensitic transformation have been known for a long time, e.g. B. from: R. Haynes, Some Observations on Isothermal Transformations of Eutectoid Aluminum Bronzes Below Their M s Temperatures, Journal of the Institute of Metals 1954-55, Vol. 83, pages 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 Eutectoid, Journal of the Institute of Metals 1963-64, Vol.
- these alloys show a clear memory effect compared to the also 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 subjected to diffusion-related phase changes in the desired temperature range. At the response temperature or just above it, the high-temperature ß 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 above 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 quenched to room temperature after the last annealing in the ⁇ mixed crystal region and then tempered in the temperature range from 200 to 350 ° C. for 0.1 to 10 h.
- the alloy is quenched from the ⁇ mixed crystal region directly into an oil, salt, metal or sand bath at 250 to 350 ° C. after the last annealing, held here for 0.5 to 10 min and finally at 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 process 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 in the alloys of the Cu / Al / Ni type 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. H. they mainly consist of the ⁇ high-temperature phase and show a stable two-way effect.
- the alloy was produced by melt metallurgy, cast into an ingot and then hot-worked at 700 ° C. in such a way that a rod of 10 mm in diameter was produced. 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 and a diameter of 3 mm were worked out from the rod. The two-way effect was induced by subjecting the samples to torsional stress near the martensitic transformation point M S (150 ° C) such that the torsional strain was gradually increased to 4 to 5% while going through a heating / cooling cycle. The samples were then heated at a temperature of Annealed at 300 ° C. The check showed that the memory effect had completely disappeared.
- Example 1 An alloy according to Example 1 was melted, cast, thermoformed, annealed and quenched in water in a manner similar to Example 1. 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 period of 500 h at 300 ° C, a two-way effect was still detectable - albeit weaker.
- Example II 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.
- the invention is not limited to the examples above.
- the method can in principle be applied to all ß-copper alloys of the Cu / Al or Cu / Al / Ni type.
- Another cheap legation has the following composition:
- the level of the transition temperature Ms can apparently be greatly 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 are resistant to aging beyond the range of temperature monitoring customary in electrical engineering and in many industrial and household applications and have a stable two-way effect. In doing so, they are closing a previously existing gap in surveillance technology.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
- Heat Treatment Of Articles (AREA)
- Adornments (AREA)
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 befähigte β-Phase (ß-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
Diese Legierungen zeigen zwar in einem über der Raumtemperatur liegenden Temperaturbereich von mehr als 100°C (was für Temperatur- überwachungsgeräte und Überstromschalter 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-ß-Phase um und der Gedächtniseffekt geht verloren.Although these alloys show a clear memory effect compared to the also 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 subjected to diffusion-related phase changes in the desired temperature range. At the response temperature or just above it, the high-temperature ß phase changes and the memory effect is lost.
Der Erfindung liegt die Aufgabe zugrunde, bei Temperaturen von über 100° C alterungsbeständige Gedächtnislegierungen des Cu/AI- oder Cu/AI/Ni-Typs sowie ein Verfahren zu deren Herstellung bzw. Stabiliserung des Zweiwegeffekts 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 above 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.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 voliegenden Legierung nach der letzten im ß-Mischkristallgebiet liegenden Glühung im Temperaturbereich von 600 bis 950° C (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 β-Mischkristallgebiet direkt in ein Öl-, 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 quenched to room temperature after the last annealing in the β mixed crystal region and then tempered in the temperature range from 200 to 350 ° C. for 0.1 to 10 h. In a second process, the alloy is quenched from the β mixed crystal region directly into an oil, salt, metal or sand bath at 250 to 350 ° C. after the last annealing, held here for 0.5 to 10 min and finally at 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 ß-Typs Cu/AI und Cu/ AI/Ni, insbesondere auf Legierungen mit 10 bis 15 Gew.-% Aluminium, 0 bis 6 Gew.-% Nickel, Rest Kupfer. Dabei kann das Nickel in den Legierungen vom Typ Cu/AI/Ni 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 process 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 in the alloys of the Cu / Al / Ni type 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. H. 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 using the following exemplary embodiments.
Als Ausgangsmaterial diente eine Legierung der nachfolgenden Zusammensetzung:
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 hot-worked at 700 ° C. in such a way that a rod of 10 mm in diameter was produced. 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 and a diameter of 3 mm were worked out from the rod. The two-way effect was induced by subjecting the samples to torsional stress near the martensitic transformation point M S (150 ° C) such that the torsional strain was gradually increased to 4 to 5% while going through a heating / cooling cycle. The samples were then heated at a temperature of Annealed at 300 ° C. The check showed that the memory effect had completely disappeared.
Eine Legierung gemäß Beispiel 1 wurde ähnlich wie im Beispiel 1 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.An alloy according to Example 1 was melted, cast, thermoformed, annealed and quenched in water in a manner similar to Example 1. 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 period of 500 h at 300 ° C, a two-way effect was still detectable - albeit weaker.
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.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 ß-Kupferlegierungen des Cu/AI-oder Cu/AI/Ni-Typs angewendet werden. Eine weitere günstige Leögierung hat folgende Zusammensetzung:
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 Ms can apparently be greatly 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 Überwachungstechnik.The method according to the invention creates memory alloys which are resistant to aging beyond the range of temperature monitoring customary in electrical engineering and in many industrial and household applications and have a stable two-way effect. In doing so, they are closing a previously existing gap in surveillance technology.
Claims (7)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
| 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 |
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0035069A1 EP0035069A1 (en) | 1981-09-09 |
| EP0035069B1 true EP0035069B1 (en) | 1983-12-21 |
Family
ID=8186965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19800200183 Expired 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 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0035069B1 (en) |
| JP (1) | JPS56136945A (en) |
| DE (1) | DE3065930D1 (en) |
| PT (1) | PT72590B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4416706A (en) * | 1982-02-05 | 1983-11-22 | Bbc Brown, Boveri & Company Limited | Process to produce and stabilize a reversible two-way shape memory effect in a Cu-Al-Ni or a 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 |
| JPS6130643A (en) * | 1984-07-20 | 1986-02-12 | Kobe Steel Ltd | Hard shape memory alloy having high workability |
| FR2590048B1 (en) * | 1985-07-19 | 1992-05-15 | Souriau & Cie | SEQUENTIAL MECHANICAL TRIGGER DEVICE |
| FR2617187B1 (en) * | 1987-06-24 | 1989-10-20 | Cezus Co Europ Zirconium | METHOD FOR IMPROVING THE DUCTILITY OF A MARTENSITICALLY TRANSFORMED ALLOY PRODUCT AND THE USE THEREOF |
| FR2618163B1 (en) * | 1987-07-15 | 1992-04-30 | Trefimetaux | METHOD FOR EDUCATION OF A SHAPE MEMORY ALLOY OBJECT, ENSURING THE PRECISION AND STABILITY OF THE REVERSIBLE MEMORY EFFECT. |
| CH677677A5 (en) * | 1989-02-08 | 1991-06-14 | Nivarox Sa | |
| DE69004986D1 (en) * | 1989-02-08 | 1994-01-20 | Nivarox Sa | Method for treating a workpiece made of a metallic shape memory alloy with two reversible shape memory states. |
| FR2643086B1 (en) * | 1989-02-10 | 1991-05-24 | Nivarox Sa | METHOD FOR CONDITIONING A SHAPE MEMORY METAL ALLOY PART HAVING TWO REVERSIBLE SHAPE MEMORY STATES |
| CN108384984B (en) * | 2018-04-09 | 2020-01-03 | 天津理工大学 | Preparation method of low-cost high-temperature shape memory alloy |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB433534A (en) * | 1934-02-12 | 1935-08-12 | Thomas Bolton And Sons Ltd | Improved trolley wheels and the like devices for collecting electric current |
| GB1346047A (en) * | 1969-11-12 | 1974-02-06 | Fulmer Res Inst Ltd | Treatment of alloys |
| BE758862A (en) * | 1969-11-12 | 1971-04-16 | Fulmer Res Inst Ltd | Improvements relating to the treatment of alloys |
| JPS5818427B2 (en) * | 1974-07-05 | 1983-04-13 | 大阪大学長 | Method for producing metal articles with repeated shape memory |
| JPS5337129A (en) * | 1976-09-17 | 1978-04-06 | Matsushita Electric Works Ltd | Conductible spring material |
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1980
- 1980-03-03 EP EP19800200183 patent/EP0035069B1/en not_active Expired
- 1980-03-03 DE DE8080200183T patent/DE3065930D1/en not_active Expired
-
1981
- 1981-02-27 PT PT7259081A patent/PT72590B/en not_active IP Right Cessation
- 1981-03-02 JP JP2850381A patent/JPS56136945A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56136945A (en) | 1981-10-26 |
| JPH0138867B2 (en) | 1989-08-16 |
| DE3065930D1 (en) | 1984-01-26 |
| PT72590A (en) | 1981-03-01 |
| PT72590B (en) | 1982-02-12 |
| EP0035069A1 (en) | 1981-09-09 |
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