Dynamic globularization mechanism during hot working of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with lamellar microstructure

doi:10.1016/j.matchar.2020.110749

CORC > 金属研究所 > 中国科学院金属研究所

	Dynamic globularization mechanism during hot working of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with lamellar microstructure
	Li, Xin 1; Deng, Siying 2; Wang, Songwei 2; Song, Hongwu 2; Zhang, Shihong 2; Wang, Kelu 1; Ouyang, Delai 1
刊名	MATERIALS CHARACTERIZATION
	2021
卷号	171 页码:11
关键词	Titanium alloy Hot compression Substructure evolution Globularization mechanism
ISSN号	1044-5803
DOI	10.1016/j.matchar.2020.110749
通讯作者	Song, Hongwu(hwsong@imr.ac.cn)
英文摘要	In the present work, the isothermal compression of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with lamellar microstructure was conducted at 980 degrees C and strain rate range of 0.01-10 s(-1). Evolution of substructure during hot working was analyzed to investigate the dynamic globularization mechanism with the help of SEM and TEM techniques. The main conclusions are as follows: At 0.01 s(-1), the globularization mechanism is a continuous dynamic recrystallization, which is formed by the combination of the penetration of the beta phase into alpha lamella along the subgrain boundaries and the sliding between the subgrain boundaries. This process is accompanied by the coarsening of the globularized alpha phase. While in the strain rate range of 0.1-10 s(-1), the globularization mechanisms are the segmentation of alpha lamella along the twin grain boundaries and the process of discontinuous dynamic recrystallization, and the final equiaxed microstructure is smaller than the initial thickness of alpha lamella. Moreover, with the increase of strain rate and the decrease of temperature, discontinuous dynamic recrystalli-zation gradually becomes the dominant mechanism of globularization. The beta phase undergoes dynamic recovery or continuous dynamic recrystallization at different strain rate, which results in the globularization of beta lamellae. The alpha and beta lamellae promote each other in globularization.
资助项目	National Natural Science Foundation of China[51761029] ; National Natural Science Foundation of China[51864035] ; National Natural Science Foundation of China[51875547] ; National Natural Science Foundation of China[JW201323004] ; National Natural Science Foundation of China[EJ201701513] ; National Natural Science Foundation of China[EJ201901454] ; Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province (Nanchang Hangkong University)
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000616013600001
资助机构	National Natural Science Foundation of China ; Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province (Nanchang Hangkong University)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160661]
专题	金属研究所_中国科学院金属研究所
通讯作者	Song, Hongwu
作者单位	1.Nanchang Hangkong Univ, Sch Aeronaut Mfg Engn, Nanchang 330063, Jiangxi, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Xin,Deng, Siying,Wang, Songwei,et al. Dynamic globularization mechanism during hot working of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with lamellar microstructure[J]. MATERIALS CHARACTERIZATION,2021,171:11.
APA	Li, Xin.,Deng, Siying.,Wang, Songwei.,Song, Hongwu.,Zhang, Shihong.,...&Ouyang, Delai.(2021).Dynamic globularization mechanism during hot working of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with lamellar microstructure.MATERIALS CHARACTERIZATION,171,11.
MLA	Li, Xin,et al."Dynamic globularization mechanism during hot working of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with lamellar microstructure".MATERIALS CHARACTERIZATION 171(2021):11.