Blocky and columnar microstructures and the influence on mechanical behaviors of a hot-pressed Nb-23Ti-15Al alloy

IMR OpenIR

	Blocky and columnar microstructures and the influence on mechanical behaviors of a hot-pressed Nb-23Ti-15Al alloy
	Shi, Zhiwu; Wei, Hua; Zhang, Hongyu; Jin, Tao; Sun, Xiaofeng; Zheng, Qi; qzheng@imr.ac.cn
	2015
发表期刊	MATERIALS & DESIGN
ISSN	0261-3069
卷号	87 页码:1003-1009
摘要	The microstructure and mechanical behaviors of a hot-pressed Nb-23Ti-15Al (at.%) alloy have been investigated. The results indicate that with different hot-pressing temperatures, the alloy presents remarkably different microstructural morphologies: blocky microstructure or columnar microstructure. At lower hot-pressing temperature, the blocky delta phase is formed by the reaction of the metastable sigma phase and the beta phase; at higher hot-pressing temperature, the delta phase directly precipitates from the supersaturated beta phase with preferred orientation relationships of [212](delta)//[001](beta) and (02 (1) over bar)(delta)//(110)(beta) to form columnar microstructure. The columnar microstructure leads to higher microhardness and better toughness, for the reason that the columnar microstructure could resist deformation of the alloy effectively, and impede initiation and propagation of cracks. (C) 2015 Elsevier Ltd. All rights reserved.
部门归属	[shi, zhiwu ; wei, hua ; zhang, hongyu ; jin, tao ; sun, xiaofeng ; zheng, qi] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china
关键词	Nb-ti-al Alloy Hot Pressing Microstructure Phase Transformation Mechanical Property
资助者	MSBRDP of China [2010CB631206]; NNSF of China [51371173]
收录类别	sci
语种	英语
WOS记录号	WOS:000363816000115
引用统计	被引频次：5[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/321006/74655
专题	中国科学院金属研究所
通讯作者	qzheng@imr.ac.cn
推荐引用方式 GB/T 7714	Shi, Zhiwu,Wei, Hua,Zhang, Hongyu,et al. Blocky and columnar microstructures and the influence on mechanical behaviors of a hot-pressed Nb-23Ti-15Al alloy[J]. MATERIALS & DESIGN,2015,87:1003-1009.
APA	Shi, Zhiwu.,Wei, Hua.,Zhang, Hongyu.,Jin, Tao.,Sun, Xiaofeng.,...&qzheng@imr.ac.cn.(2015).Blocky and columnar microstructures and the influence on mechanical behaviors of a hot-pressed Nb-23Ti-15Al alloy.MATERIALS & DESIGN,87,1003-1009.
MLA	Shi, Zhiwu,et al."Blocky and columnar microstructures and the influence on mechanical behaviors of a hot-pressed Nb-23Ti-15Al alloy".MATERIALS & DESIGN 87(2015):1003-1009.