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01-08-2014

Microstructure of stress-induced martensite in nanocrystalline NiTi shape memory alloy

Authors: Xiao-Bin Shi, Li-Shan Cui, Zhen-Yang Liu, Da-Qiang Jiang, Xiao-Dong Han

Published in: Rare Metals | Issue 4/2014

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Abstract

The microstructure of stress-induced martensite (SIM) in the nanocrystalline NiTi alloy was investigated by means of transmission electron microscopy (TEM). The result shows that the multi-variant structure of the martensite is suppressed and only single-variant martensitic twins form after tensile deformation when the grain size is smaller than 80 nm. The normal directions of the (001)_B19′ twin planes are all within the range of 45° from the axial direction of the wire. The angle between twin crystals (\(\bar{1}11\))_M and (111)_T of the SIM is also found to be smaller than that of thermally induced martensite in nanocrystalline NiTi.

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Title: Microstructure of stress-induced martensite in nanocrystalline NiTi shape memory alloy
Authors: Xiao-Bin Shi
Li-Shan Cui
Zhen-Yang Liu
Da-Qiang Jiang
Xiao-Dong Han
Publication date: 01-08-2014
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 4/2014
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-014-0343-y

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