Tensile actuation response of additively manufactured nickel-titanium shape memory alloys

被引：85

作者：

Sam, J. ^{[1
]}

Franco, B. ^{[1
]}

Ma, J. ^{[1
]}

Karaman, I. ^{[1
]}

Elwany, A. ^{[2
]}

Mabe, J. H. ^{[3
]}

机构：

[1] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA

[2] Texas A&M Univ, Dept Ind & Syst Engn, College Stn, TX 77843 USA

[3] Boeing Co, St Louis, MO USA

来源：

SCRIPTA MATERIALIA | 2018年 / 146卷

基金：

美国国家科学基金会;

关键词：

Additive manufacturing; Shape memory alloys; NiTi; Selective laser melting; Actuation; NITI; BULK;

D O I：

10.1016/j.scriptamat.2017.11.013

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present work, we characterize the tensile shape memory actuation behavior of NiTi shape memory alloys (SMAs) fabricated using laser powder bed fusion (L-PBF) additive manufacturing process. The samples were fabricated using two different sets of processing parameters. While reversible tensile shape memory behavior was observed in both cases, the samples fabricated with a shorter hatch spacing exhibited higher transformation temperatures, lower actuation strain, and lower irrecoverable strain compared to the samples fabricated with wider hatch spacing. The actuation strain and ductility of the L-PBF samples were lower than that of the conventionally manufactured NiTi SMA samples. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：164 / 168

页数：5

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