Properties of Ti-Ni Pre-alloyed Powder Used for Electron Beam Melting

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	Properties of Ti-Ni Pre-alloyed Powder Used for Electron Beam Melting
	Ren Dechun 1,2; Zhang Huibo 1; Li Shujun 1; Hou Wentao 1; Wang Jian 1; Jin Wei 1; Yang Rui 1
刊名	RARE METAL MATERIALS AND ENGINEERING
	2020-09-01
卷号	49 期号:9 页码:3218-3224
关键词	Ti-Ni pre-alloyed powder electron beam melting heat treatment thermal cycle phase transformation behavior
ISSN号	1002-185X
通讯作者	Jin Wei(wjin@imr.ac.cn)
英文摘要	The properties of pre-alloyed powder have an important influence on the additive manufacturing process, especially for Ti-Ni alloys with special shape memory effects. However, there are limited reports on the studies for the variation of Ti-Ni pre-alloyed powder with heat treatment temperatures and number of thermal cycles. In this work, the phase transformation behavior, microstructure and phase composition of 53 similar to 106 mu m Ti-Ni pre-alloyed powder used for electron beam melting (EBM) were studied using the differential scanning calorimeter, X-ray diffraction, and scanning electron microscope. The results show that the powder has good particle size distribution, internal filling and spherical topography, and suitable for EBM process. The structure and composition become uniform, internal stress and dislocation are eliminated and crystal grain size grows with the increase of heat treatment temperature, which causes the original multi-step phase transformation to one-step phase transformation during the heating and cooling process after 550 degrees C and the phase transformation points maintain a stable state after 650 degrees C heat treatment. The phase composition is not changed during the heat treatment process and the powder has best sintering state at 750 degrees C. The phase composition, one-step phase transformation behavior and phase transformation points are all not changed for the powder during 750 degrees C thermal cycles test, indicating good thermal cycling stability. Ti-Ni solid samples with good surface condition are successfully prepared under 750 degrees C preheating temperature for bottom plate and powder layer.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000576197200042
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140829]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jin Wei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ren Dechun,Zhang Huibo,Li Shujun,et al. Properties of Ti-Ni Pre-alloyed Powder Used for Electron Beam Melting[J]. RARE METAL MATERIALS AND ENGINEERING,2020,49(9):3218-3224.
APA	Ren Dechun.,Zhang Huibo.,Li Shujun.,Hou Wentao.,Wang Jian.,...&Yang Rui.(2020).Properties of Ti-Ni Pre-alloyed Powder Used for Electron Beam Melting.RARE METAL MATERIALS AND ENGINEERING,49(9),3218-3224.
MLA	Ren Dechun,et al."Properties of Ti-Ni Pre-alloyed Powder Used for Electron Beam Melting".RARE METAL MATERIALS AND ENGINEERING 49.9(2020):3218-3224.