J. Phys. IV France
Volume 112, October 2003
Page(s) 393 - 396

J. Phys. IV France
112 (2003) 393
DOI: 10.1051/jp4:2003909

Effects of cobalt content on martensitic transformation and shape memory effect in Fe-Mn-Si-Cr-Ni alloys

B. Jiang, K. Xu, X. Qi and W. Zhou

Key Laboratory for High Temperature Materials & Tests of Ministry of Education, Shanghai, Jiaotong University, Shanghai 200030, China

The effects of cobalt content on the stacking fault probability ( Psf) determined by means of X-ray diffraction profile analysis and associated with the starting temperature of $\gamma\to\epsilon$ transformation ( MS) and the strain-hardening exponent ( n) etc, have been investigated in Fe-Mn-Si-Cr-Ni based alloys with four different contents of Co from 0.39% to 3.93% (wt). The results show that Ms and n increase with increasing Co content which is related to the increase of the stacking fault probability owing to the addition of cobalt. Addition of proper content of cobalt in Fe-Mn-Si-Cr-Ni alloy can improve its SME.

© EDP Sciences 2003