期刊
SCRIPTA MATERIALIA
卷 74, 期 -, 页码 60-63出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.10.023
关键词
NiTi; Shape memory alloys; Cryogenic machining; Machining-induced layer; Twinning deformation
类别
资金
- NASA EPSCOR Program [NNX11AQ31A]
- NASA FAP Aeronautical Sciences Project
This study presents evidence of a machining-induced deformation layer in a NiTi shape memory alloy and the subsequent effect of this layer on the underlying transformation behavior of the material. Severe twinning-induced deformation was observed in the substrate of samples pre-cooled and machined by orthogonal cutting under cryogenic conditions, while (1 1 4)(B2)-type deformation twinning and significant dislocation activity was observed after dry machining of the NiTi. In addition, cryogenic machining resulted in a much deeper affected zone than machining under dry conditions. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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