Effect of Cr and Ni on the temperature dependence of deformation behavior and shape memory effects in Fe-Mn-Si alloys
- Institute of Metal Research, Shenyang (China)
Effects of Cr and Ni on the tensile deformation behavior and shape memory effect (SME) in Fe-Mn-Si shape memory alloys have been investigated over the temperature range of 293-77 K. It was found that the increase of stacking fault energy (SFE) in Fe-Mn-Si alloys by additions of Cr and Ni can result in a decreased temperature dependence of work hardening, which is determined by thermal-induced martensite, intersection of {epsilon}-plates with stacking faults, and difficult cross slip of dislocations in low SFE alloys. Moreover, the increase of c/a ratio for martensite in Cr and Ni bearing alloys can reduce the interfacial energy and shear deformation required for the formation of fcc twins and facilitate their formation. As a result, the penetration process of {epsilon}-plates on different (111) planes can be avoided through the formation of e-martensite in fcc twins, and the SME is improved.
- OSTI ID:
- 476716
- Report Number(s):
- CONF-950722-; ISSN 0065-2482; TRN: 97:009207
- Journal Information:
- Advances in Cryogenic Engineering, Vol. 42A; Conference: CEC/ICMC `95: cryogenic engineering conference and international cryogenic materials conference, Columbus, OH (United States), 17-21 Jul 1995; Other Information: PBD: 1997
- Country of Publication:
- United States
- Language:
- English
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