Selection of Twin Variants in Dynamic Plastic Deformation of Pure Ti at Liquid Nitrogen Temperature

doi:10.11900/0412.1961.2021.00491

IMR OpenIR

	Selection of Twin Variants in Dynamic Plastic Deformation of Pure Ti at Liquid Nitrogen Temperature
	Gao Dong 1; Zhou Yu 2; Yu Ze 3; Sang Baoguang 1
通讯作者	Zhou Yu(yzhou@imr.ac.cn) ; Sang Baoguang(sangbg@dlpu.edu.cn)
	2022-09-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	58 期号:9 页码:1141-1149
摘要	Pure Ti can form twins during deformation due to the hcp crystal structure, and some kinds of twins can easily form under certain conditions, thus affecting the properties of materials. It has considerable influence on the properties of materials through the regulation of twin types and variants. This work investigates the effect of the dislocation slip of adjacent grains on the selection of twin variants during the deformation of pure Ti. The dynamic plastic deformation (DPD) of commercially pure Ti (99.9%) was performed at liquid nitrogen temperature (-196 degrees C). The microstructure before and after the deformation was observed using EBSD. The influence of twinning on Schmid factor (m) before and after deformation was investigated, and a mechanism for selecting twin variants of polycrystalline pure Ti was proposed. The results show that after DPD at liquid nitrogen temperature, high-density primary twins appeared in pure Ti, followed by secondary and double twins. After twinning, the Schmid factor of basal slip changed noticeably, and the m of a large number of grains was close to 0.5. Based on the geometric compatibility factor (m') of the original slip and twin matching relationship and the Schmid factor of an adjacent grain (m(1)), a new orientation compatibility factor omega (omega = m(1).m') was established, and the selection of twin variants in the plastic deformation of polycrystalline pure titanium was quantitatively analyzed. It was discovered that the omega determines the selection of twin variants in pure Ti, and the pyramidal slip of the adjacent grain plays a significant role in promoting the initiation of twin variants.
关键词	pure Ti microstructure geometric compatibility factor orientation compatibility factor twin variant
资助者	Joint Research and Development Fund of Liaoning Province and Shenyang National Laboratory for Materials Science ; Young Talents Project of Shenyang National Laboratory for Materials Science ; Natural Science Foundation Project of Liaoning Provincial Department of Education
DOI	10.11900/0412.1961.2021.00491
收录类别	SCI
语种	英语
资助项目	Joint Research and Development Fund of Liaoning Province and Shenyang National Laboratory for Materials Science[2019JH3/30100030] ; Young Talents Project of Shenyang National Laboratory for Materials Science ; Natural Science Foundation Project of Liaoning Provincial Department of Education[J2020050]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000841981600005
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174495
专题	中国科学院金属研究所
通讯作者	Zhou Yu; Sang Baoguang
作者单位	1.Dalian Polytecn Univ, Sch Mech Engn & Automat, Dalian 116034, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.AVIC Shenyang Aircraft Co Ltd, Shenyang 110850, Peoples R China
推荐引用方式 GB/T 7714	Gao Dong,Zhou Yu,Yu Ze,et al. Selection of Twin Variants in Dynamic Plastic Deformation of Pure Ti at Liquid Nitrogen Temperature[J]. ACTA METALLURGICA SINICA,2022,58(9):1141-1149.
APA	Gao Dong,Zhou Yu,Yu Ze,&Sang Baoguang.(2022).Selection of Twin Variants in Dynamic Plastic Deformation of Pure Ti at Liquid Nitrogen Temperature.ACTA METALLURGICA SINICA,58(9),1141-1149.
MLA	Gao Dong,et al."Selection of Twin Variants in Dynamic Plastic Deformation of Pure Ti at Liquid Nitrogen Temperature".ACTA METALLURGICA SINICA 58.9(2022):1141-1149.