Investigation on the microstructure and mechanical behaviors of a laser formed Nb-Ti-Al alloy

doi:10.1016/j.matchar.2020.110193

CORC > 金属研究所 > 中国科学院金属研究所

	Investigation on the microstructure and mechanical behaviors of a laser formed Nb-Ti-Al alloy
	Shi, Zhiwu 2; Liu, Jinlai 1; Wei, Hua 3; Zhang, Hongyu 1; Sun, Xiaofeng 1; Zheng, Qi 1
刊名	MATERIALS CHARACTERIZATION
	2020-04-01
卷号	162 页码:8
关键词	Laser forming Nb-Ti-Al alloy Microstructure Ti(O,C) Double diffraction Mechanical behavior
ISSN号	1044-5803
DOI	10.1016/j.matchar.2020.110193
通讯作者	Shi, Zhiwu(shizhiwu@acae.com.cn) ; Zheng, Qi(qzheng@imr.ac.cn)
英文摘要	Nb-Ti-Al alloys have attracted much attention as a potential candidate for high-temperature structural applications beyond the scope of Ni-based superalloys. Previously, Nb-Ti-Al alloys were prepared by arc-melting or hot-pressing. In this study, laser forming of the Nb-23Ti-15Al alloy is explored, and the microstructure and mechanical behaviors are systematically investigated. The results indicate that the nearly defectless Nb-Ti-Al alloy with fine dendrites could be obtained through laser forming. Three phases, beta, delta and Ti(O,C), present in the alloy, and the beta/delta matrix displays a columnar microstructure. Moreover, the Ti(O,C) phase, a solid-solution of TiO or TiC, appears in the alloy. Ti(O,C) is formed due to the introduction of the O and C from the elemental powder, which has a face-centered cubic (FCC) structure and a moderate lattice parameter between that of TiO and TiC. Two morphologies of Ti(O,C), large cobblestone-like particles and small dispersive particles, are observed in the alloy. Forbidden reflections of delta phase occur due to double diffraction and slight superlattice reflections of beta phase arise. Furthermore, refined beta/delta phases and dispersed small Ti(O,C) result in higher microhardness and fracture toughness. In brief, our results indicate that laser forming is a potential method for manufacturing Nb-Ti-Al alloys with prominent properties.
资助项目	NNSF of China[51601192] ; NNSF of China[51671189]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000539353900023
资助机构	NNSF of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139240]
专题	金属研究所_中国科学院金属研究所
通讯作者	Shi, Zhiwu; Zheng, Qi
作者单位	1.Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.AECC Commercial Aircraft Engine Co Ltd, Dept Mat Sci & Mfg Proc, Shanghai 200241, Peoples R China 3.Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Peoples R China
推荐引用方式 GB/T 7714	Shi, Zhiwu,Liu, Jinlai,Wei, Hua,et al. Investigation on the microstructure and mechanical behaviors of a laser formed Nb-Ti-Al alloy[J]. MATERIALS CHARACTERIZATION,2020,162:8.
APA	Shi, Zhiwu,Liu, Jinlai,Wei, Hua,Zhang, Hongyu,Sun, Xiaofeng,&Zheng, Qi.(2020).Investigation on the microstructure and mechanical behaviors of a laser formed Nb-Ti-Al alloy.MATERIALS CHARACTERIZATION,162,8.
MLA	Shi, Zhiwu,et al."Investigation on the microstructure and mechanical behaviors of a laser formed Nb-Ti-Al alloy".MATERIALS CHARACTERIZATION 162(2020):8.