EP0035069A1 - Alliage à mémoire de forme à base de Cu-Al ou de Cu-Al-Ni et procédé pour la stabilisation de l'effet de réversibilité - Google Patents

Alliage à mémoire de forme à base de Cu-Al ou de Cu-Al-Ni et procédé pour la stabilisation de l'effet de réversibilité Download PDF

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Publication number
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
Authority
EP
European Patent Office
Prior art keywords
temperature
memory alloy
shape memory
way effect
temperature range
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19800200183
Other languages
German (de)
English (en)
Other versions
EP0035069B1 (fr
Inventor
Keith Dr. Melton
Olivier Dr. Mercier
Helmut Dr. Riegger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to DE8080200183T priority Critical patent/DE3065930D1/de
Priority to EP19800200183 priority patent/EP0035069B1/fr
Priority to PT7259081A priority patent/PT72590B/pt
Priority to JP2850381A priority patent/JPS56136945A/ja
Publication of EP0035069A1 publication Critical patent/EP0035069A1/fr
Application granted granted Critical
Publication of EP0035069B1 publication Critical patent/EP0035069B1/fr
Expired legal-status Critical Current

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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.
  • 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.

Landscapes

  • 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)
EP19800200183 1980-03-03 1980-03-03 Alliage à mémoire de forme à base de Cu-Al ou de Cu-Al-Ni et procédé pour la stabilisation de l'effet de réversibilité Expired EP0035069B1 (fr)

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 (fr) 1980-03-03 1980-03-03 Alliage à mémoire de forme à base de Cu-Al ou de Cu-Al-Ni et procédé pour la stabilisation de l'effet de réversibilité
PT7259081A PT72590B (de) 1980-03-03 1981-02-27 Harzmischung
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 (fr) 1980-03-03 1980-03-03 Alliage à mémoire de forme à base de Cu-Al ou de Cu-Al-Ni et procédé pour la stabilisation de l'effet de réversibilité

Publications (2)

Publication Number Publication Date
EP0035069A1 true EP0035069A1 (fr) 1981-09-09
EP0035069B1 EP0035069B1 (fr) 1983-12-21

Family

ID=8186965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800200183 Expired EP0035069B1 (fr) 1980-03-03 1980-03-03 Alliage à mémoire de forme à base de Cu-Al ou de Cu-Al-Ni et procédé pour la stabilisation de l'effet de réversibilité

Country Status (4)

Country Link
EP (1) EP0035069B1 (fr)
JP (1) JPS56136945A (fr)
DE (1) DE3065930D1 (fr)
PT (1) PT72590B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086014A1 (fr) * 1982-02-05 1983-08-17 BBC Brown Boveri AG Procédé pour la fabrication et la stabilisation de l'effet de réversibilité à deux directions dans un alliage mémoire de forme à base de Cu-Al-Ni ou de Cu-Al
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 (fr) * 1985-07-19 1987-01-21 Souriau Et Cie Dispositif de déclenchement mécanique séquentiel
US4654092A (en) * 1983-11-15 1987-03-31 Raychem Corporation Nickel-titanium-base shape-memory alloy composite structure
EP0297004A2 (fr) * 1987-06-24 1988-12-28 CEZUS Compagnie Européenne du Zirconium Utilisation d'un procédé pour améliorer la ductilité d'un produit en alliage à transformation martensitique
FR2618163A1 (fr) * 1987-07-15 1989-01-20 Trefimetaux Procede d'education d'un objet en alliage a memoire de forme, permettant d'assurer la precision et la stabilite de l'effet memoire reversible.
EP0382109A1 (fr) * 1989-02-08 1990-08-16 Nivarox-FAR S.A. Procédé de conditionnement d'une pièce en alliage métallique à mémoire de forme présentant deux états de mémoire de forme réversibles
FR2643086A1 (fr) * 1989-02-10 1990-08-17 Nivarox Sa Procede de conditionnement d'une piece en alliage metallique a memoire de forme presentant deux etats de memoire de forme reversibles
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108384984B (zh) * 2018-04-09 2020-01-03 天津理工大学 一种低成本高温形状记忆合金的制备方法

Citations (2)

* Cited by examiner, † Cited by third party
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE758862A (fr) * 1969-11-12 1971-04-16 Fulmer Res Inst Ltd Perfectionnements relatifs au traitement d'alliages
JPS5818427B2 (ja) * 1974-07-05 1983-04-13 大阪大学長 繰り返し形状記憶性を有する金属物品の製法
JPS5337129A (en) * 1976-09-17 1978-04-06 Matsushita Electric Works Ltd Conductible spring material

Patent Citations (2)

* Cited by examiner, † Cited by third party
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

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086014A1 (fr) * 1982-02-05 1983-08-17 BBC Brown Boveri AG Procédé pour la fabrication et la stabilisation de l'effet de réversibilité à deux directions dans un alliage mémoire de forme à base de Cu-Al-Ni ou de Cu-Al
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 (fr) * 1985-07-19 1987-05-15 Souriau & Cie Dispositif de declenchement mecanique sequentiel
EP0209466A2 (fr) * 1985-07-19 1987-01-21 Souriau Et Cie Dispositif de déclenchement mécanique séquentiel
EP0297004A2 (fr) * 1987-06-24 1988-12-28 CEZUS Compagnie Européenne du Zirconium Utilisation d'un procédé pour améliorer la ductilité d'un produit en alliage à transformation martensitique
FR2617187A1 (fr) * 1987-06-24 1988-12-30 Cezus Co Europ Zirconium Procede d'amelioration de la ductilite d'un produit en alliage a transformation martensitique et son utilisation
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 (fr) * 1987-07-15 1989-01-20 Trefimetaux Procede d'education d'un objet en alliage a memoire de forme, permettant d'assurer la precision et la stabilite de l'effet memoire reversible.
EP0382109A1 (fr) * 1989-02-08 1990-08-16 Nivarox-FAR S.A. Procédé de conditionnement d'une pièce en alliage métallique à mémoire de forme présentant deux états de mémoire de forme réversibles
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 (fr) * 1989-02-10 1990-08-17 Nivarox Sa Procede de conditionnement d'une piece en alliage metallique a memoire de forme presentant deux etats de memoire de forme reversibles

Also Published As

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

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