Microscopic mechanism of martensitic stabilization in shape-memory alloys: Atomic-level processes
β Scribed by Deng, Junkai; Ding, Xiangdong; Lookman, Turab; Suzuki, Tetsuro; Otsuka, Kazuhiro; Sun, Jun; Saxena, Avadh; Ren, Xiaobing
- Book ID
- 125519296
- Publisher
- The American Physical Society
- Year
- 2010
- Tongue
- English
- Weight
- 440 KB
- Volume
- 81
- Category
- Article
- ISSN
- 1098-0121
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Two competing mechanisms that compensate the transformation strains of the martensite are observed by transmission electron microscopy studies of nanocrystalline NiTi alloys. A single variant of compound twinned martensite forms below a critical grain size of about 100 nm. In larger grains, a herrin
Usually aged Ni-rich NiTi alloys undergo martensitic transformations on cooling from high temperatures in two steps: B2 to R and then R to B19Π (normal behaviour). But under certain ageing conditions, the transformation can also occur in three or more steps (unusual multiple step behaviour). In the