| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1599695 | Intermetallics | 2015 | 4 Pages |
Abstract
Ni54Mn25Ga20.9Gd0.1 polycrystalline high-temperature shape memory alloy displayed high compressive fracture strain of 24.6% and large shape memory effect of 7.5%. However, its deformation mechanism was still unknown. In this paper, the structure revolution characterized by XRD and TEM indicated a new deformation mechanism different before was found. The deformation process of Ni54Mn25Ga20.9Gd0.1 alloy could be divided into four stages, including elastic deformation of non-modulated tetragonal martensite (T), stress-induced T to seven-layered modulated martensite (7Â M) transformation, variants reorientation of 7Â M, and elastic-plastic deformation of reoriented 7Â M. The 7Â M formed by compression deformation disappeared completely after heating to the temperature above Af.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Xin Zhang, Jiehe Sui, Wei Cai, Qingsuo Liu, Ailian Liu,