Direct evidence for stress-induced transformation between coexisting multiple martensites in a Ni-Mn-Ga multifunctional alloy
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Article number | 265304 |
| Journal / Publication | Journal of Physics D: Applied Physics |
| Volume | 48 |
| Issue number | 26 |
| Publication status | Published - 8 Jul 2015 |
| Externally published | Yes |
Link(s)
Abstract
The structural response of coexisting multiple martensites to stress field in a Ni-Mn-Ga multifunctional alloy was investigated by the in situ high-energy x-ray diffraction technique. Stress-induced transformation between coexisting multiple martensites was observed at 110 K, at which five-layered modulated (5M), seven-layered modulated (7M) and non-modulated (NM) martensites coexist. We found that a tiny stress of as low as 0.5 MPa could trigger the transformation from 5M and 7M martensites to NM martensite and this transformation is partly reversible. Besides the transformation between coexisting multiple martensites, rearrangement of martensite variants also occurs during loading, at least at high stress levels. The present study is instructive for designing advanced multifunctional alloys with easy actuation.
Research Area(s)
- external-field-induced structural transformation, magnetic shape memory alloy, martensitic transformation
Bibliographic Note
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Citation Format(s)
Direct evidence for stress-induced transformation between coexisting multiple martensites in a Ni-Mn-Ga multifunctional alloy. / Huang, L.; Cong, D. Y.; Wang, Z. L. et al.
In: Journal of Physics D: Applied Physics, Vol. 48, No. 26, 265304, 08.07.2015.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
