Function of cleavage strength for symmetrical tilt grain boundaries

doi:10.1016/j.engfracmech.2023.109800

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Function of cleavage strength for symmetrical tilt grain boundaries
	Hu SW(胡世威)4; Liang, Hao 3; Yin, Yihui 3; Liang, Yanxiang 3; Zhang, Yuanzhang 3; Yan, Yabin 2; Li, Xiang 1
刊名	ENGINEERING FRACTURE MECHANICS
	2024-01-23
卷号	295 页码:14
关键词	Cleavage strength Grain boundaries Theoretical model Ab initio tensile simulation Critical energy release rate
ISSN号	0013-7944
DOI	10.1016/j.engfracmech.2023.109800
通讯作者	Hu, Shiwei(hushiwei@imech.ac.cn) ; Liang, Hao(lh-lhm@163.com)
英文摘要	The cleavage strength for grain boundaries (GBs) plays a crucial role in understanding the GBs' behavior and microstructure evolution during deformation. However, its universal discipline remains uncertain, and a quantitative description is currently unavailable. Here we propose the theoretical models to systematically quantify the strength of symmetrical tilt GBs in the discrete atomic perspectives. Specifically, based on the interaction of metallic atomic pairs, the interaction between the arbitrary parallel planes is expressed by considering the atomic pair distribution on both sides of the separated planes. On this basis, the function of GBs' cleavage strength is proposed by considering that the interaction at GBs is composed of the interaction of the interfaces that make up GBs and the interaction between mirror atomic pairs at both sides of the symmetry plane. Furthermore, the theoretical prediction of the critical energy release rate Gc for the sharp crack extension is proposed based on the present cleavage strength function. All the theoretical models are validated by the ab initio simulations or citations. This work quantitatively proposes the cleavage strength function of symmetrical tilt GBs, predicts the critical energy release rate for cleavage, and provides a new methodology for studying mechanical properties of materials in the discrete atomic perspectives.
分类号	一类
资助项目	National Natural Science Foundation of China[11572298]
WOS关键词	TOTAL-ENERGY CALCULATIONS ; UNIVERSAL FEATURES ; 1ST-PRINCIPLES ; SEGREGATION ; EMBRITTLEMENT ; EQUATION ; HYDROGEN ; METALS
WOS研究方向	Mechanics
语种	英语
WOS记录号	WOS:001137694700001
资助机构	National Natural Science Foundation of China
其他责任者	Hu, Shiwei ; Liang, Hao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94027]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Southwest Univ Sci & Technol, Sch Mfg Sci & Engn, Mianyang 621010, Sichuan, Peoples R China 2.East China Univ Sci & Technol, Sch Mech Power & Engn, Shanghai 200237, Peoples R China; 3.China Acad Engn Phys Mianyang, Inst Syst Engn, Sichuan 621999, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Ctr Interdisciplinary Res Fluids, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Hu SW,Liang, Hao,Yin, Yihui,et al. Function of cleavage strength for symmetrical tilt grain boundaries[J]. ENGINEERING FRACTURE MECHANICS,2024,295:14.
APA	胡世威.,Liang, Hao.,Yin, Yihui.,Liang, Yanxiang.,Zhang, Yuanzhang.,...&Li, Xiang.(2024).Function of cleavage strength for symmetrical tilt grain boundaries.ENGINEERING FRACTURE MECHANICS,295,14.
MLA	胡世威,et al."Function of cleavage strength for symmetrical tilt grain boundaries".ENGINEERING FRACTURE MECHANICS 295(2024):14.