Diffusional-displacive transformation in a metastable beta titanium alloy and its strengthening effect

doi:10.1016/j.actamat.2020.05.058

IMR OpenIR

	Diffusional-displacive transformation in a metastable beta titanium alloy and its strengthening effect
	Qi, Lu 1,2; He, Suyun 1,2; Chen, Chunjin 1,2; Jiang, Binbin 1; Hao, Yulin 3; Ye, Hengqiang 1; Yang, Rui 3; Du, Kui 1
通讯作者	Du, Kui(kuidu@imr.ac.cn)
	2020-08-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	195 页码:151-162
摘要	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.
关键词	Phase transition Microstructure Compositional fluctuation Precipitation hardening Mechanical behavior
资助者	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
收录类别	SCI
语种	英语
资助项目	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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000552116400015
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：51[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/139882
专题	中国科学院金属研究所
通讯作者	Du, Kui
作者单位	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
推荐引用方式 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.