| 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 Author | Du, Kui(kuidu@imr.ac.cn) |
| 2020-08-15 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 195Pages:151-162 |
| Abstract | Diffusional-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. |
| Keyword | Phase transition Microstructure Compositional fluctuation Precipitation hardening Mechanical behavior |
| Funding Organization | National 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 |
| DOI | 10.1016/j.actamat.2020.05.058 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000552116400015 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139882 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Du, Kui |
| Affiliation | 1.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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