Effect of heat aging on thermal and mechanical properties of Ti-Ni-Nb shape memory alloy

Takaei Yamamoto; Toshio Sakuma; Kazunari Uchida; Yuji Sutou; Kiyoshi Yamauchi

doi:10.2320/matertrans.48.439

Effect of heat aging on thermal and mechanical properties of Ti-Ni-Nb shape memory alloy

Takaei Yamamoto, Toshio Sakuma, Kazunari Uchida, Yuji Sutou, Kiyoshi Yamauchi

ENG - Materials Science

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

This paper describes the effect of heat aging on thermal and mechanical properties of shape memory alloy. The materials used in this study are Ti-Ni-(6-12at%)Nb shape memory alloy. The tensile tests at 173 K and the heating-cooling tests under constrained strain condition were carried out using the specimens aged at 561 K for between 20 h and 1000 h in normal water chemistry. The martensite start temperature rapidly decreases in the initial short aging time, but there is little further decrease of the martensite start temperature with aging time more than 100 h. The recovery stress gradually increases with aging time, but on the contrary, the aging time of more than 500 h causes reduction of the recovery stress.

Original language	English
Pages (from-to)	439-444
Number of pages	6
Journal	Materials Transactions
Volume	48
Issue number	3
DOIs	https://doi.org/10.2320/matertrans.48.439
Publication status	Published - 2007 Mar

Keywords

Aging
Recovery stress
Shape memory alloy
Titanium-nickel-niobium
Transformation temperature

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10.2320/matertrans.48.439

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abstract = "This paper describes the effect of heat aging on thermal and mechanical properties of shape memory alloy. The materials used in this study are Ti-Ni-(6-12at%)Nb shape memory alloy. The tensile tests at 173 K and the heating-cooling tests under constrained strain condition were carried out using the specimens aged at 561 K for between 20 h and 1000 h in normal water chemistry. The martensite start temperature rapidly decreases in the initial short aging time, but there is little further decrease of the martensite start temperature with aging time more than 100 h. The recovery stress gradually increases with aging time, but on the contrary, the aging time of more than 500 h causes reduction of the recovery stress.",

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AU - Yamamoto, Takaei

AU - Sakuma, Toshio

AU - Uchida, Kazunari

AU - Sutou, Yuji

AU - Yamauchi, Kiyoshi

PY - 2007/3

Y1 - 2007/3

N2 - This paper describes the effect of heat aging on thermal and mechanical properties of shape memory alloy. The materials used in this study are Ti-Ni-(6-12at%)Nb shape memory alloy. The tensile tests at 173 K and the heating-cooling tests under constrained strain condition were carried out using the specimens aged at 561 K for between 20 h and 1000 h in normal water chemistry. The martensite start temperature rapidly decreases in the initial short aging time, but there is little further decrease of the martensite start temperature with aging time more than 100 h. The recovery stress gradually increases with aging time, but on the contrary, the aging time of more than 500 h causes reduction of the recovery stress.

AB - This paper describes the effect of heat aging on thermal and mechanical properties of shape memory alloy. The materials used in this study are Ti-Ni-(6-12at%)Nb shape memory alloy. The tensile tests at 173 K and the heating-cooling tests under constrained strain condition were carried out using the specimens aged at 561 K for between 20 h and 1000 h in normal water chemistry. The martensite start temperature rapidly decreases in the initial short aging time, but there is little further decrease of the martensite start temperature with aging time more than 100 h. The recovery stress gradually increases with aging time, but on the contrary, the aging time of more than 500 h causes reduction of the recovery stress.

KW - Aging

KW - Recovery stress

KW - Shape memory alloy

KW - Titanium-nickel-niobium

KW - Transformation temperature

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Effect of heat aging on thermal and mechanical properties of Ti-Ni-Nb shape memory alloy

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Keywords

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