Effects of Laser Scanning Speed on Microstructure and Properties of Ti- Ni Shape Memory Alloy

IMR OpenIR

	Effects of Laser Scanning Speed on Microstructure and Properties of Ti- Ni Shape Memory Alloy
	Jiang, Muchi 1,2; Ren, Dechun 2; Zhao, Xiaoyu 2; Cai, Yusheng 2; Ji, Haibin 2; Lei, Jiafeng 1,2; Yang, Rui 1,2
通讯作者	Ji, Haibin()
	2023-04-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	52 期号:4 页码:1455-1463
摘要	Selective laser melting (SLM) was used to fabricate Ti-Ni shape memory alloys. The effects of scanning speed on internal defects, molten pool morphologies, phase transformation behavior and mechanical properties of the alloy were studied using OM, SEM, XRD, and room-temperature compression. The results show that with the increase of laser scanning speed, the internal defect morphology changes from a nearly regular spherical shape to an irregular one when other printing parameters of SLM remain unchanged. For instance, the width and continuity of the molten pool morphology decrease with the increase of laser scanning speed. Besides, the increasing laser scanning speed initiates that the phase composition of Ni-rich Ti-Ni shape memory alloy changes, B19' martensite content decreases, and B2 austenite content increases. And the transformation temperature of the formed Ni-rich Ti-Ni shape memory alloy decreases at first and then increases with the increase of laser scanning speed, but there is a single transformation peak during the process of temperature rise and fall. At 900 mm/s of the scanning speed, the relative density of the alloy reaches 98.5%, yielding the minimum internal defects. Simultaneously, the sample has a maximum compressive strength of 3120 MPa and a compressive strain of 41%, which is the best printing parameter to produce exceptional properties.
关键词	Ti-Ni shape memory alloy additive manufacturing laser scanning speed defect type mechanical property
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000976102200037
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177460
专题	中国科学院金属研究所
通讯作者	Ji, Haibin
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Muchi,Ren, Dechun,Zhao, Xiaoyu,et al. Effects of Laser Scanning Speed on Microstructure and Properties of Ti- Ni Shape Memory Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2023,52(4):1455-1463.
APA	Jiang, Muchi.,Ren, Dechun.,Zhao, Xiaoyu.,Cai, Yusheng.,Ji, Haibin.,...&Yang, Rui.(2023).Effects of Laser Scanning Speed on Microstructure and Properties of Ti- Ni Shape Memory Alloy.RARE METAL MATERIALS AND ENGINEERING,52(4),1455-1463.
MLA	Jiang, Muchi,et al."Effects of Laser Scanning Speed on Microstructure and Properties of Ti- Ni Shape Memory Alloy".RARE METAL MATERIALS AND ENGINEERING 52.4(2023):1455-1463.