| Spinodal decomposition coupled with a continuous crystal ordering in a titanium alloy | |
| Wang, W. J.1,2; Gong, D. L.1,2; Wang, H. L.3; Ke, Y. B.4; Qi, L.5; Li, S. J.1; Yang, R.1; Hao, Y. L.1 | |
| Corresponding Author | Hao, Y. L.(ylhao@imr.ac.cn) |
| 2022-07-01 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 233Pages:12 |
| Abstract | Spinodal decomposition mechanism is well-known for producing nanoscale modulated microstructure which is either sponge-like or plate-like. Our recent investigations of a Ti-Nb based titanium alloy have found two kinds of decomposition-induced transitions triggered simultaneously, a microstructural tran-sition from the spongy-like to the plate-like and a crystal structure transition from bcc to hcp via the coupled atomic shear and shuffle mechanism along the Burgers pathway. Here focuses on thermal evo-lution kinetics of both transitions and their quantitative relations. Small angle neutron scattering profiles reveal that the aging treatments lead to a gradual change from an oval pattern to a butterfly pattern due to the spongy-to-plate microstructural transition. To characterize the crystal transition and its induced habit plane change, we define an ordering parameter from the shear component of the bcc-hcp tran-sition. The results reveal that both follow the well-known power-law approximation with an activation energy of similar to 209 kJ/mol, which is identical with diffusion energy of Nb in binary Ti-Nb alloy. However, their time exponential factors are different, about 1/5 for the microstructure growth and 1/16 for the crystal ordering and its induced habit plane change. The former is less than the common 1/3 law of the decomposition mechanism and the nucleation and growth mechanism. Aided by these kinetic equations, the microstructural and chemical parameters can be modeled by the crystal ordering. This provides a new strategy to tune the nanoscale microstructure by this novel spinodal decomposition coupled with a continuous crystal ordering. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | Spinodal decomposition Small angle neutron scattering Microstructural transition Crystal ordering Titanium alloy |
| Funding Organization | NSF of China ; MOST of China ; CAS |
| DOI | 10.1016/j.actamat.2020.117969 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | NSF of China[51771209] ; NSF of China[51631007] ; MOST of China[2016YFC1102600] ; MOST of China[2017YFC1104901] ; CAS[QYZDJ-SSW-JSC031] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000830505000003 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/174730 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Hao, Y. L. |
| Affiliation | 1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Dongguan Univ Technol, Sch Mech Engn, Dongguan 523808, Peoples R China 4.Chinese Acad Sci, Inst High Energy Phys, China Spallat Neutron Source, Dongguan 523803, Peoples R China 5.Shandong Univ, Sci Ctr Mat Creat & Energy Convers, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, W. J.,Gong, D. L.,Wang, H. L.,et al. Spinodal decomposition coupled with a continuous crystal ordering in a titanium alloy[J]. ACTA MATERIALIA,2022,233:12. |
| APA | Wang, W. J..,Gong, D. L..,Wang, H. L..,Ke, Y. B..,Qi, L..,...&Hao, Y. L..(2022).Spinodal decomposition coupled with a continuous crystal ordering in a titanium alloy.ACTA MATERIALIA,233,12. |
| MLA | Wang, W. J.,et al."Spinodal decomposition coupled with a continuous crystal ordering in a titanium alloy".ACTA MATERIALIA 233(2022):12. |
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