Effect of Cr and Ni on the Temperature Dependence of Deformation Behavior and Shape Memory Effects in Fe-Mn-Si Alloys

  • L. J. Rong
  • Y. Y. Li
  • H. M. Cheng
  • C. X. Shi
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)


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 e-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 ɛ-plates on different {111} planes can be avoided through the formation of e-martensite in fcc twins, and the SME is improved.


Shape Memory Shape Memory Alloy Stack Fault Energy Shape Memory Effect Experimental Alloy 
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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • L. J. Rong
    • 1
  • Y. Y. Li
    • 1
  • H. M. Cheng
    • 1
  • C. X. Shi
    • 1
  1. 1.Institute of Metal ResearchAcademia SinicaShenyangP. R. China

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