Method of conditioning an object of shape-memory metallic alloy with two reversible shape-memory states and an object thus obtained
US4753689A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1986 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Mar 13, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12944
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method of conditioning an object in shape-memory material of metallic alloy type. The object formed to final shapes and dimensions constituting the first shape-memory state is submitted to a thermal treatment in order to bring this object to an austenitic crystallographic phase, then to cooling. The object is then submitted in at least one deformation zone to a process of education consisting of imposing on the object, in at least one cycle, a series of thermal and/or mechanical stresses. The stresses are such as to lead to deformation of the object for bringing it to a shape close to its second shape-memory state in a martensitic crystallographic state, then to permit the return of the object to its first shape-memory state, on a return of the object to the austenitic crystallographic state. Application to electric contact elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.