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Evolution of equiaxed alpha phase during heat treatment in a near alpha titanium alloy
Gao, Xiongxiong; Zeng, Weidong; Wang, Yubo; Long, Yu; Zhang, Saifei; Wang, Qingjiang; Zeng, WD (reprint author), Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China.
2017-11-25
Source PublicationELSEVIER SCIENCE SA
ISSN0925-8388
Volume725Pages:536-543
AbstractThe evolution of equiaxed primary a phase (alpha(p)) during post-deformation heat treatment of near-alpha titanium alloy Ti-5.6Al-3.8Sn-3.2Zr-1.0Ta-0.5Mo-0.4Nb-0.35Si was studied. This alloy was isothermally compressed at 1019 degrees C and subsequently heat treatment at 1024 degrees C for times ranging from 0.5 to 24 h. The recrystallization behavior and boundary splitting within equiaxed ap were analyzed by crystallo-graphic orientation and microstructure observations. The results showed that the formation of internal (sub) boundaries within the alpha(p) was by the strong recovery. In most cases, it is difficult to obtain a refinement of big equiaxed alpha(p) by boundary splitting and ap grains were still contiguous with "peanut" shape at relatively short heat treatment time (<= 24 h, 1024 degrees C). The groove in the "peanut" structure was indicative of boundary of alpha/alpha. Only in a few cases, when an isolated beta grain can form within the interior ap along the (sub) boundary, refinement of ap grain may be achieved due to the obvious reduction of boundary splitting distance. These observations were rationalized on the basis of the classical Mullins grooving analysis. (C) 2017 Elsevier B.V. All rights reserved.; The evolution of equiaxed primary a phase (alpha(p)) during post-deformation heat treatment of near-alpha titanium alloy Ti-5.6Al-3.8Sn-3.2Zr-1.0Ta-0.5Mo-0.4Nb-0.35Si was studied. This alloy was isothermally compressed at 1019 degrees C and subsequently heat treatment at 1024 degrees C for times ranging from 0.5 to 24 h. The recrystallization behavior and boundary splitting within equiaxed ap were analyzed by crystallo-graphic orientation and microstructure observations. The results showed that the formation of internal (sub) boundaries within the alpha(p) was by the strong recovery. In most cases, it is difficult to obtain a refinement of big equiaxed alpha(p) by boundary splitting and ap grains were still contiguous with "peanut" shape at relatively short heat treatment time (<= 24 h, 1024 degrees C). The groove in the "peanut" structure was indicative of boundary of alpha/alpha. Only in a few cases, when an isolated beta grain can form within the interior ap along the (sub) boundary, refinement of ap grain may be achieved due to the obvious reduction of boundary splitting distance. These observations were rationalized on the basis of the classical Mullins grooving analysis. (C) 2017 Elsevier B.V. All rights reserved.
description.department[gao, xiongxiong ; zeng, weidong ; wang, yubo ; long, yu ; zhang, saifei] northwestern polytech univ, state key lab solidificat proc, xian 710072, shaanxi, peoples r china ; [wang, qingjiang] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china
KeywordNear Alpha Titanium Alloy Microstructure Refinement Recrystallization Boundary Splitting
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationResearch Fund for the Program of National Natural Science Foundation of China [51075333]; Program of National Key Research and Development Plan of China [2016YFB0301200]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78969
Collection中国科学院金属研究所
Corresponding AuthorZeng, WD (reprint author), Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China.
Recommended Citation
GB/T 7714
Gao, Xiongxiong,Zeng, Weidong,Wang, Yubo,et al. Evolution of equiaxed alpha phase during heat treatment in a near alpha titanium alloy[J]. ELSEVIER SCIENCE SA,2017,725:536-543.
APA Gao, Xiongxiong.,Zeng, Weidong.,Wang, Yubo.,Long, Yu.,Zhang, Saifei.,...&Zeng, WD .(2017).Evolution of equiaxed alpha phase during heat treatment in a near alpha titanium alloy.ELSEVIER SCIENCE SA,725,536-543.
MLA Gao, Xiongxiong,et al."Evolution of equiaxed alpha phase during heat treatment in a near alpha titanium alloy".ELSEVIER SCIENCE SA 725(2017):536-543.
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