期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 35, 期 10, 页码 2238-2242出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2019.05.015
关键词
NiTi shape memory alloy; Selective laser melting; Tensile ductility; Shape memory effect
资金
- National Key RAMP
- D Program of China [2018YFB1105100]
- Science Foundation of China University of Petroleum, Beijing [2462018BJC005]
- Joint Fund of Ministry of Education for Pre-research of Equipment [6141A020222]
- fourth batch of pre-research projects for manned spaceflight [040202]
It is a challenge to develop complex-shaped NiTi shape memory alloy parts by traditional processing methods, due to the poor machinability of NiTi alloy. It is reported that selective laser melting (SLM) of additive manufacturing could overcome this problem. However, the reported SLM-produced NiTi exhibits poor tensile ductility due to the inner defects and adverse unidirectional columnar grains from SLM process. In this work, the defect-less SLM-NiTi with nondirective columnar grains was fabricated by optimizing the intraformational laser scanning length and interformational laser scanning direction. The obtained lath-shaped SLM-NiTi sample exhibits tensile strain of 15.6%, more than twice of the reported maximum result ((7) over tilde%). Besides, the SLM-NiTi part with complex geometry displays a shape memory recovery of 99% under compressive deformation of 50%. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据