期刊
SCRIPTA MATERIALIA
卷 145, 期 -, 页码 90-94出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.10.016
关键词
NiTiHf; High temperature shape memory alloys; Additive manufacturing; Actuators
类别
资金
- NASA Glenn Research Center, Transformational Tools & Technologies (TTT) Project [NNC16VA75P]
A NiTi-20Hf high temperature shape memory alloy (HTSMA) was additively manufactured by selective laser melting (SLM) technique using NiTiHf powder. The thermomechanical and shape memory response were compared to the conventional vacuum induction skull melted counterpart. Transformation temperatures of the SLM material were found to be above 200 degrees C and slightly lower due to the additional oxygen pick up from the gas atomization and melting process. The shape memory response in compression was measured for stresses up to 500 MPa, and transformation strains were found to be very comparable (up to 1.26% for as-extruded; up to 1.52% for SLM). (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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