Characterization of DSC curves of the two-way shape memory effect induced by thermo-mechanical training in TiNiCu alloy

WANG Zhi-guo; ZU Xiao-tao; FENG Xiang-dong; DENG Jiong; DAI Jing-yi; FU Ping

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Journal of Aeronautical Materials ›› 2004, Vol. 24 ›› Issue (3) : 1-4.

Characterization of DSC curves of the two-way shape memory effect induced by thermo-mechanical training in TiNiCu alloy

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Abstract

Transformation characters of TiNiCu two-way shape memory(TWSM)spring were investigated by differential scanning calorimetry DSC measurement during thermo-mechanical training.The results showed that before training the profile of endothermic peaks were composed of several small peaks.With training the amount of the small peaks decreased.After the stabilized TWSME induced into the TiNiCu alloy,there was only one sharp peak appear.This can attribute to the dislocations structures creates an anisotropic stress field,which guides the orientation of martensite variants very similar.And the dislocations also leads to the decrease of As and Af.Annealing induced the small peaks merge into one peak which resulted from the annihilation of the dislocation introduced by thermo-mechanical training.

Key words

TiNiCu shape memory / thermo-mechanical tr / two-way shape memory / DSC

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WANG Zhi-guo, ZU Xiao-tao, FENG Xiang-dong, DENG Jiong, DAI Jing-yi, FU Ping. Characterization of DSC curves of the two-way shape memory effect induced by thermo-mechanical training in TiNiCu alloy[J]. Journal of Aeronautical Materials, 2004, 24(3): 1-4

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