Usually aged Ni-rich NiTi alloys undergo martensitic transformations on cooling from high temperatures in two steps: B2 to R and then R to B19Ј (normal behaviour). But under certain ageing conditions, the transformation can also occur in three or more steps (unusual multiple step behaviour). In the
Understanding of multi-stage R-phase transformation in aged Ni-rich Ti–Ni shape memory alloys
✍ Scribed by Y. Zhou; G. Fan; J. Zhang; X. Ding; X. Ren; J. Sun; K. Otsuka
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 152 KB
- Volume
- 438-440
- Category
- Article
- ISSN
- 0921-5093
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Normally, martensitic transformation occurs in two stages (B2-R-B19 ) in aged Ni-rich TiNi alloys. But a three-stage martensitic transformation was also reported. The origin of this abnormal transformation behavior has remained controversial, and in particular it is difficult to understand why in so