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The Influence of Thermomechanical Treatment on R–Phase Transition and Shape Memory Effect

Published online by Cambridge University Press:  25 February 2011

Guo Jinfang ,
Cheng Yuying ,
Zhu Ming ,
Shen Long  and
Yuan Guansen
Guo Jinfang
Affiliation:
General Research Institute for Non–ferrous Metals, Beijing 100088, China, P. R.
Cheng Yuying
Affiliation:
General Research Institute for Non–ferrous Metals, Beijing 100088, China, P. R.
Zhu Ming
Affiliation:
General Research Institute for Non–ferrous Metals, Beijing 100088, China, P. R.
Shen Long
Affiliation:
General Research Institute for Non–ferrous Metals, Beijing 100088, China, P. R.
Yuan Guansen
Affiliation:
General Research Institute for Non–ferrous Metals, Beijing 100088, China, P. R.
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Abstract

This paper discussed the influence of cold working and annealing process on R–phase SME in an equiatomic TiNi alloy by means of tensile test, phase transformation, temperature measurement, and shape recovery examination. The results show that the increase in cold deformation of TiNi alloy got the increase in both tensile strength and R–phasc transition (TR–Ms). As R–phase becomes stable, the SME will be improved and the decay of memory effect will also be controlled at fatique test. The increase in annealing temperature got the decrease in R–phase transition range. In that case the stability of R–phase and the SME of the alloy also become bad. When annealing at 600°C, the recrystallization occurs no R–phase is found. Surely the SME of alloy becomes bad.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 246: Symposium M – Shape-Memory Materials and Phenomena--Fundamental Aspects and Applications , 1991 , 283
Copyright
Copyright © Materials Research Society 1992

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