Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting

doi:10.1016/j.msea.2019.138586

IMR OpenIR

	Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting
	Ren, D. C.1,2; Zhang, H. B.1; Liu, Y. J.1; Li, S. J.1; Jin, W.1; Yang, R.1; Zhang, L. C.3
通讯作者	Zhang, H. B.(zhanghb@imr.ac.cn) ; Liu, Y. J.(yujing.liu@uwa.edu.au)
	2020-01-13
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	771 页码:10
摘要	Selective Laser Melting (SLM) as one of the additive manufacturing technologies can be used to produce Ti-Ni shape memory alloys with complex shape. In this work, equiatomic Ti50Ni50 (at.%) samples were produced by SLM with different scanning speed, and near-fully dense (99.5% relative density) parts were obtained under a low input laser energy density (40 J/mm(3)) with the scanning speed of 1000 mm/s. The different scanning speeds had limited influence on the phase composition, transformation temperatures and Vickers hardness. Under low magnification, the typical molten pool morphology with inhomogenous microstructure was shown in the samples of SLM-produced Ti-Ni alloy, and self-accommodate martensite (B19') twins with a few austenite (B2), nanoscale Ti2Ni and rhombohedral (R) phases were found at higher magnification. Due to the formation of nanoscale Ti2Ni phase and inhomogenous microstructure, the SLM-produced Ti-Ni alloy exhbited lower phase transformation temperatures and larger hysteresis temperatures between the start and finish point of the phase transformation compared to the Ti-Ni powder. The formation of the R phase was contributed to the special repeat heating process and stress field formed by Ti2Ni phase and dislocations In SLM equiatomic Ti-Ni alloy. The SLM-produced Ti-Ni alloy exhibits higher compressive and tensile fracture strength but lower compressive and tensile fracture strain compared to the conventional cast samples.
关键词	Selective laser melting Ti-Ni Scanning speed Microstructure Mechanical property
资助者	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
DOI	10.1016/j.msea.2019.138586
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22010103] ; National Key Research and Development Program of China[2017YFC1104903] ; National Key Research and Development Program of China[2016YFC1102601] ; National Natural Science Foundation of China[51871220] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC031-02]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000503324700019
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：52[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/321006/136489
专题	中国科学院金属研究所
通讯作者	Zhang, H. B.; Liu, Y. J.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Edith Cowan Univ, Sch Engn, Perth, WA 6027, Australia
推荐引用方式 GB/T 7714	Ren, D. C.,Zhang, H. B.,Liu, Y. J.,et al. Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,771:10.
APA	Ren, D. C..,Zhang, H. B..,Liu, Y. J..,Li, S. J..,Jin, W..,...&Zhang, L. C..(2020).Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,771,10.
MLA	Ren, D. C.,et al."Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 771(2020):10.