Iron-based alloy having shape memory properties and superelasticity and its production method
US8083990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2006 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Jan 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0308
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An iron-based alloy having shape memory properties and superelasticity, which has a composition comprising 25-35% by mass of Ni, 13-25% by mass of Co, 2-8% by mass of Al, and 1-20% by mass in total of at least one selected from the group consisting of 1-5% by mass of Ti, 2-10% by mass of Nb and 3-20% by mass of Ta, the balance being substantially Fe and inevitable impurities, and a recrystallization texture substantially comprising a γ phase and a γ′ phase, particular crystal orientations of the γ phase being aligned, and the difference between a reverse transformation-finishing temperature and a martensitic transformation-starting temperature being 100° C. or less in the thermal hysteresis of martensitic transformation and reverse transformation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.