J Mater Sci Technol ›› 2001, Vol. 17 ›› Issue (03): 318-320.

• Research Articles • Previous Articles     Next Articles

Effect of pre-strain on the transformation and recovery behaviours of a Ti44Ni47Nb9 shape memory alloy

Wei JIN, Mingzhou GAO, Rui YANG, Zhuangqi HU   

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2000-07-07 Revised:2000-08-13 Online:2001-05-28 Published:2009-10-10
  • Contact: Wei JIN

Abstract: The recovery strain, stress and transformation temperature of different pre-strained specimens of Ti44Ni47Nb9 were investigated by tensile test and electrical resistance measurement. The results indicated that pre-strain increases the reverse martensitic transformation temperature (A ' (s)) and hysteresis (A(s) - M-s). The recovery strain and stress are higher if the specimens are pre-strained between M-s and A(s) temperature than outside this temperature range. There exists an optimal pre-strain value, about 10%, at which the specimen exhibits maximum recovery strain and stress.

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