Fabrication of highly heterogeneous precipitate microstructure in an α/β titanium alloy

doi:10.1016/j.actamat.2024.120302

IMR OpenIR

	Fabrication of highly heterogeneous precipitate microstructure in an α/β titanium alloy
	Jia, Yandi 1,2; Su, Huhu 3; Cao, Shuo 1,2; Shi, Rongpei 4,5; Ma, Yingjie 1,2; Wang, Qian 2; Huang, Sensen 2; Zhang, Ruixue 2; Hu, Qingmiao 2; Zheng, Yufeng 6; Zheng, Shijian 3; Lei, Jiafeng 1,2; Yang, Rui 1,2
通讯作者	Shi, Rongpei(shirongpei@hit.edu.cn) ; Ma, Yingjie(yjma@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
	2024-10-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	279 页码:18
摘要	To obtain a synergistic combination of high strength and high ductility in titanium alloys, design and creation of heterogenous precipitate microstructure have attracted increasing attention. Herein, using Ti-3Al-5Mo-4.5V (wt. %, an alpha/(1 titanium alloy) as a model alloy, we demonstrated that a highly heterogenous alpha-phase precipitate microstructures with well-controlled length scale of spatial heterogeneity (i.e., micron-sized primary alpha and nanoscale secondary alpha precipitates), can be synthesized through activating the omega-assisted alpha nucleation transformation pathway that operates in metastable (1 titanium alloy alone. A detailed analysis of transformation pathway for omega phase and the underlying omega-assisted alpha nucleation mechanisms is carried out using the integrated advanced characterizations, theoretical calculations and simulations based on DFT, and phase-field modeling. Experimental results show unambiguously that the embryonic omega particles (also known as athermal omega) with partially collapsed structure are incapable of refining secondary alpha (alpha s). In contrast, the isothermal omega particles with a complete structural collapse play an important role in assisting alpha s nucleation, resulting in the formation of the ultrafine alpha s lamellae at nanoscales after two-step aging heat treatments. The contributions from the isothermal omega particles are then quantified using first-principles calculations and phase-field simulations. It is found that, even though the solute partitioning between a growing isothermal omega particle reduces the alpha s nucleation driving force in the surrounding beta matrix, the elastic interaction between the omega particles and the alpha s nucleus provides more driving force for alpha s nucleation at specific locations of the omega/beta interface. Our work extends the microstructure design strategy based on omega-assisted alpha nucleation mechanism from metastable (1 to alpha/(1 Ti-alloys, thereby significantly widening the application space of the strategy.
关键词	omega-Assisted alpha nucleation Secondary alpha lamellae Phase transformation Heterostructure Titanium alloys
资助者	National Key Research and Development Program of China ; Natural Science Foundation of China ; CAS Project for Young Scientists in Basic Research ; Youth Innovation Promotion Association CAS ; Guangdong Basic and Applied Basic Research Foundation ; Shenzhen Basic Research Project (Natural Science Foundation)
DOI	10.1016/j.actamat.2024.120302
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2021YFC2801801] ; Natural Science Foundation of China[U2106215] ; CAS Project for Young Scientists in Basic Research[YSBR-025] ; Youth Innovation Promotion Association CAS ; Guangdong Basic and Applied Basic Research Foundation[2024A1515011873] ; Guangdong Basic and Applied Basic Research Foundation[2021B1515120071] ; Shenzhen Basic Research Project (Natural Science Foundation)[JCYJ20220818102403007]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001301086900001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：7[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/321006/189316
专题	中国科学院金属研究所
通讯作者	Shi, Rongpei; Ma, Yingjie; Yang, Rui
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 3.Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin Key Lab Mat Laminating Fabricat & Interfac, Tianjin 300401, Peoples R China 4.Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China 5.Harbin Inst Technol, Inst Mat Genome & Big Data, Shenzhen 518055, Peoples R China 6.Univ North Texas, Dept Mat Sci & Engn, Denton, TX 76207 USA
推荐引用方式 GB/T 7714	Jia, Yandi,Su, Huhu,Cao, Shuo,et al. Fabrication of highly heterogeneous precipitate microstructure in an α/β titanium alloy[J]. ACTA MATERIALIA,2024,279:18.
APA	Jia, Yandi.,Su, Huhu.,Cao, Shuo.,Shi, Rongpei.,Ma, Yingjie.,...&Yang, Rui.(2024).Fabrication of highly heterogeneous precipitate microstructure in an α/β titanium alloy.ACTA MATERIALIA,279,18.
MLA	Jia, Yandi,et al."Fabrication of highly heterogeneous precipitate microstructure in an α/β titanium alloy".ACTA MATERIALIA 279(2024):18.