Shear deformation in TiAl: Atomic dynamic and static simulations

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	Shear deformation in TiAl: Atomic dynamic and static simulations
	Y. L. Liu; S. Q. Wang; H. Q. Ye
	2007
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	22 期号:6 页码:1685-1693
摘要	The dynamic shear deformation process and the related stacking fault transitions in TiAl have been systematically investigated using both the molecular dynamics and ab initio methods. The details of the dislocation initiation and microstructural evolution are presented, and the concomitant potential energy variation and the radial distribution functions have been analyzed. The results show, interestingly, that some deformation-induced hexagonal close-packed (hcp) structures are metastable, and that a higher velocity field promotes more hcp segments. The phenomena are interpreted based on ab initio calculations of the detailed energy variation at the different fault transition stages, i.e., superlattice intrinsic stacking fault (SISF) -> TWIN, SISF -> hcp, and hcp -> TWIN. The intrinsic factor that governs the deformation process is discussed. The results promote new understanding of the stress-induced interfaces and dislocation behaviors in experimental observations.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. grad univ chinese acad sci, beijing 100049, peoples r china. peking univ, electron microscope lab, beijing 100871, peoples r china.;liu, yl (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;yongliliu@imr.ac.cn
关键词	Gamma-titanium Aluminides Phase-transformation Interfacial Energies Electron-microscopy Alloys Microstructure 1st-principles Dislocation Behavior Fracture
URL	查看原文
WOS记录号	WOS:000247053600030
引用统计	被引频次：6[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/321006/33723
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. L. Liu,S. Q. Wang,H. Q. Ye. Shear deformation in TiAl: Atomic dynamic and static simulations[J]. Journal of Materials Research,2007,22(6):1685-1693.
APA	Y. L. Liu,S. Q. Wang,&H. Q. Ye.(2007).Shear deformation in TiAl: Atomic dynamic and static simulations.Journal of Materials Research,22(6),1685-1693.
MLA	Y. L. Liu,et al."Shear deformation in TiAl: Atomic dynamic and static simulations".Journal of Materials Research 22.6(2007):1685-1693.