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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
Source PublicationMATERIALS & DESIGN
ISSN0261-3069
Volume87Pages:1003-1009
AbstractThe 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.
description.department[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
KeywordNb-ti-al Alloy Hot Pressing Microstructure Phase Transformation Mechanical Property
Funding OrganizationMSBRDP of China [2010CB631206]; NNSF of China [51371173]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74655
Collection中国科学院金属研究所
Corresponding Authorqzheng@imr.ac.cn
Recommended Citation
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.
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