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

doi:10.1016/j.matchar.2020.110193

IMR OpenIR

	Investigation on the microstructure and mechanical behaviors of a laser formed Nb-Ti-Al alloy
	Shi, Zhiwu 1; Liu, Jinlai 2; Wei, Hua 3; Zhang, Hongyu 2; Sun, Xiaofeng 2; Zheng, Qi 2
通讯作者	Shi, Zhiwu(shizhiwu@acae.com.cn) ; Zheng, Qi(qzheng@imr.ac.cn)
	2020-04-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	162 页码:8
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.
关键词	Laser forming Nb-Ti-Al alloy Microstructure Ti(O,C) Double diffraction Mechanical behavior
资助者	NNSF of China
DOI	10.1016/j.matchar.2020.110193
收录类别	SCI
语种	英语
资助项目	NNSF of China[51601192] ; NNSF of China[51671189]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:000539353900023
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：10[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/321006/139238
专题	中国科学院金属研究所
通讯作者	Shi, Zhiwu; Zheng, Qi
作者单位	1.AECC Commercial Aircraft Engine Co Ltd, Dept Mat Sci & Mfg Proc, Shanghai 200241, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, 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.