Plastic anisotropy and twin distributions near the fatigue crack tip of textured Mg alloys from in situ synchrotron X-ray diffraction measurements and multiscale mechanics modeling

doi:10.1016/j.jmps.2022.104936

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Plastic anisotropy and twin distributions near the fatigue crack tip of textured Mg alloys from in situ synchrotron X-ray diffraction measurements and multiscale mechanics modeling
	Xie, Di 4; Zhang, Wei 4; Lyu, Zongyang 4; Liaw, Peter K.4; Tran, Huy 3; Chew, Huck Beng 3; Wei, Yujie 2; Ren, Yang 1; Gao, Yanfei 4
刊名	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
	2022-08-01
卷号	165 页码:26
关键词	In situ synchrotron X-ray diffraction (S-XRD) Mg alloy Fatigue crack Cohesive interface model Crystal plasticity finite element method
ISSN号	0022-5096
DOI	10.1016/j.jmps.2022.104936
通讯作者	Gao, Yanfei(ygao7@utk.edu)
英文摘要	In spite of many potential applications due to their superior mechanical properties, magnesium alloys still find many practical restrictions primarily due to our limited knowledge of their failure mechanisms. In situ and non-destructive strain measurements on the microstructural scales are critical in understanding the fatigue crack behavior, which has greater advantages than the macroscopic measurements based on replica technique and the small-scale mechanical testing that cannot easily provide a complete view on the synergy of many scale-dependent deformation and failure mechanisms. This work exploits the state-of-the-art synchrotron X-ray diffraction technique to attain in situ strain mapping results, with high spatial resolution, near a fatigue crack tip in the highly textured ZK60 Mg alloy. The accurate measurements in the plastic zone are compared to a micromechanical modeling framework, in which the steady fatigue crack is simulated by an irreversible, hysteretic cohesive interface model and the surrounding plasticity by Hill anisotropic plasticity. The general agreement in the anisotropic deformation fields is reached down to half of the plastic zone size towards the crack tip, while the discrepancy right at the crack tip can be used to develop an inverse model to extract the material-specific fatigue damage evolution in our future work. It is surprisingly noted that twin activities are localized in a narrow band from the tip to the wake of the fatigue crack, irrespective of the crack growth direction of this textured alloy. Such twin-crack interactions are understood here by our crystal plasticity finite element simulations with several representative crystallographic orientations.
资助项目	US National Science Foundation[1809640] ; US National Science Foundation[1809696] ; Center for Materials Processing at the University of Tennessee ; DOE Office of Science by Argonne National Laboratory[DE-AC02-06CH11357]
WOS关键词	WROUGHT MAGNESIUM ALLOY ; FINITE-ELEMENT SIMULATIONS ; COHESIVE-ZONE LAWS ; CYCLIC DEFORMATION ; DETWINNING BEHAVIOR ; NEUTRON-DIFFRACTION ; FRACTURE-BEHAVIOR ; FIELD PROJECTION ; VOID GROWTH ; PROPAGATION
WOS研究方向	Materials Science ; Mechanics ; Physics
语种	英语
WOS记录号	WOS:000807432700001
资助机构	US National Science Foundation ; Center for Materials Processing at the University of Tennessee ; DOE Office of Science by Argonne National Laboratory
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89642]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Gao, Yanfei
作者单位	1.City Univ Hong Kong, Dept Phys, Kwoloon, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China 3.Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA 4.Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
推荐引用方式 GB/T 7714	Xie, Di,Zhang, Wei,Lyu, Zongyang,et al. Plastic anisotropy and twin distributions near the fatigue crack tip of textured Mg alloys from in situ synchrotron X-ray diffraction measurements and multiscale mechanics modeling[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2022,165:26.
APA	Xie, Di.,Zhang, Wei.,Lyu, Zongyang.,Liaw, Peter K..,Tran, Huy.,...&Gao, Yanfei.(2022).Plastic anisotropy and twin distributions near the fatigue crack tip of textured Mg alloys from in situ synchrotron X-ray diffraction measurements and multiscale mechanics modeling.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,165,26.
MLA	Xie, Di,et al."Plastic anisotropy and twin distributions near the fatigue crack tip of textured Mg alloys from in situ synchrotron X-ray diffraction measurements and multiscale mechanics modeling".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 165(2022):26.