J Mater Sci Technol ›› 2000, Vol. 16 ›› Issue (05): 537-539.

• Research Articles • Previous Articles     Next Articles

Factors affecting transformation temperatures in Fe-Mn-Si-Cr-Ni shape memory alloy

Yuhua WEN, Ning LI, Mingjing TU   

  1. Department of Materials Shaping and Controlling Engineering, Sichuan University, Chengdu 610065, China
  • Received:1999-08-17 Revised:1999-10-14 Online:2000-09-28 Published:2009-10-10
  • Contact: Yuhua WEN

Abstract: The effects of prestrain and annealing temperature on phase transformation temperatures in Fel4Mn5Si8Cr4Ni shape memory alloy have been studied. The results showed that when the annealing temperature was 673 K, both the A(f) and the M-s temperatures increased appreciably as the prestrain increased, the A, temperature increased slightly with increasing prestrain, the resistivity difference at 303 K between the heating and cooling curve also increased with increasing prestrain, which agreed with the recovery strain. The shape memory effect in Fe-Mn-Si-Cr-Ni shape memory alloy is caused by the stress-induced gamma --> epsilon martensite transformation and its reverse transformation. When the prestrain was 10%, the M-s temperature decreased remarkably as the annealing temperature increased.

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