1. Strain induced martensite stabilization in β Ti-Zr-Nb shape memory alloy
- Author
-
Yan Li, Fei Zhang, Yongsheng Nie, Chengyang Xiong, and Xiaoyun Song
- Subjects
Materials science ,Strain (chemistry) ,Mechanical Engineering ,Alloy ,Reverse transformation ,02 engineering and technology ,Shape-memory alloy ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,Strain induced martensite ,Mechanics of Materials ,Metastability ,Ultimate tensile strength ,engineering ,General Materials Science ,Composite material ,0210 nano-technology - Abstract
An unusual phenomenon of strain induced martensite stabilization in the β-type Ti-30Zr-10Nb shape memory alloy was studied. The strain induced α″-martensite formed in the β phase during the tensile loading on the metastable Ti-30Zr-10Nb alloy. It was stabilized at room temperature and thus no superelastic recovery occurs in the alloy upon unloading. The reverse transformation temperature of the strain induced α″-martensite increased from 333 K to 369 K with increasing pre-strain from 2% to 8%. Shape memory recovery occurred in the pre-strianed Ti-30Zr-10Nb alloy upon heating. The maximum shape memory effect of the alloy was 3.5% with the pre-strain of 8%.
- Published
- 2020