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Investigation of a hot-pressed Nb-Ti-Al alloy: Mechanical alloying, microstructure and mechanical property
Shi, Zhiwu; Wei, Hua; Zhang, Hongyu; Jin, Tao; Sun, Xiaofeng; Zheng, Qi; qzheng@imr.ac.cn
2016
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume651Pages:869-877
AbstractThe Nb-23Ti-15Al (at%) alloy was prepared by mechanical alloying (MA) and hot-pressing (HPing). The microstructure evolution of powder particles during MA and its influence on the microstructure and mechanical properties of the hot-pressed (HPed) alloy have been investigated. The powder and HPed alloy were characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicate that particle size increases in the first stage and then decreases in the second stage during MA; as milling speed increases, mechanically alloyed (MAed) powder with convoluted elemental lamellae, homogeneous Nb solid-solution and an amorphous phase could be obtained respectively in 24 h. Higher homogeneity in microstructure and composition of the MAed powder particles promotes the precipitation of the delta phase and refines the beta and Ti(O,C) phases in the HPed alloy. Moreover, due to the phase equilibrium changes caused by Fe and Cr in the amorphous powder, sigma phase appears in the alloy as a stable phase instead of the delta phase. Properly MAed powder contributes to higher hardness of the HPed alloy, for reasons of microstructure refinement and sufficient precipitating of strengthening phases. (c) 2015 Elsevier B.V. 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
KeywordHigh-temperature Alloys Nb-ti-al Mechanical Alloying Microstructure Mechanical Property
Funding OrganizationMSBRDP of China [2010CB631206]; NNSF of China [51371173]
Indexed Bysci
Language英语
WOS IDWOS:000367486800099
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74929
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. Investigation of a hot-pressed Nb-Ti-Al alloy: Mechanical alloying, microstructure and mechanical property[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,651:869-877.
APA Shi, Zhiwu.,Wei, Hua.,Zhang, Hongyu.,Jin, Tao.,Sun, Xiaofeng.,...&qzheng@imr.ac.cn.(2016).Investigation of a hot-pressed Nb-Ti-Al alloy: Mechanical alloying, microstructure and mechanical property.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,651,869-877.
MLA Shi, Zhiwu,et al."Investigation of a hot-pressed Nb-Ti-Al alloy: Mechanical alloying, microstructure and mechanical property".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 651(2016):869-877.
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