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Diffusional-displacive transformation in a metastable beta titanium alloy and its strengthening effect
Qi, Lu1,2; He, Suyun1,2; Chen, Chunjin1,2; Jiang, Binbin1; Hao, Yulin3; Ye, Hengqiang1; Yang, Rui3; Du, Kui1
Corresponding AuthorDu, Kui(kuidu@imr.ac.cn)
2020-08-15
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume195Pages:151-162
AbstractDiffusional-displacive transformations are generally associated with mechanical properties of materials such as high strength. Understanding structure evolution of these transformations is of great interests from both physics and application perspectives. By combining atomic resolution electron microscopy, energy dispersive spectroscopy and first principles calculations, a continuous beta ->alpha ''->alpha transformation process has been quantitatively characterized at the atomic level in a metastable beta-Ti alloy during aging treatment. The transformation is revealed to develop by a novel mechanism involving continuous structural and compositional changes towards the equilibrium assisted by compositional fluctuation in the beta matrix. Moreover, the product phase induces a precipitate-matrix lattice mismatch, thus produces a coherency strain field surrounding the precipitates. The coherent strain field contributes significantly to the increasing hardness of the alloy after aging. These results have great potential for tailoring thermomechanical treatment routes and improving mechanical properties of materials. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
KeywordPhase transition Microstructure Compositional fluctuation Precipitation hardening Mechanical behavior
Funding OrganizationNational Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; National Key Research and Development Program of China ; Key Research Program of Frontier Sciences CAS
DOI10.1016/j.actamat.2020.05.058
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[91960202] ; National Natural Science Foundation of China[51771203] ; National Natural Science Foundation of China[51901229] ; National Natural Science Foundation of China[51571190] ; National Natural Science Foundation of China[51771209] ; Shenyang National Laboratory for Materials Science[L2019R09] ; Shenyang National Laboratory for Materials Science[L2019F14] ; National Key Research and Development Program of China[2017YFC1104901] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC031]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000552116400015
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139882
Collection中国科学院金属研究所
Corresponding AuthorDu, Kui
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Div Titanium Alloys, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Qi, Lu,He, Suyun,Chen, Chunjin,et al. Diffusional-displacive transformation in a metastable beta titanium alloy and its strengthening effect[J]. ACTA MATERIALIA,2020,195:151-162.
APA Qi, Lu.,He, Suyun.,Chen, Chunjin.,Jiang, Binbin.,Hao, Yulin.,...&Du, Kui.(2020).Diffusional-displacive transformation in a metastable beta titanium alloy and its strengthening effect.ACTA MATERIALIA,195,151-162.
MLA Qi, Lu,et al."Diffusional-displacive transformation in a metastable beta titanium alloy and its strengthening effect".ACTA MATERIALIA 195(2020):151-162.
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