Formation of a triangular striated structure in the twin intersection area in gamma-TiAl during room-temperature deformation

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	Formation of a triangular striated structure in the twin intersection area in gamma-TiAl during room-temperature deformation
	L. C. Zhang; G. L. Chen; J. G. Wang; H. Q. Ye
	1999
发表期刊	Intermetallics
ISSN	0966-9795
卷号	7 期号:11 页码:1241-1245
摘要	A triangular striated region, which is related to the type-I twin intersection in gamma-TiAl during room-temperature deformation, has been investigated by high-resolution transmission electron microscopy (HREM). The triangular structure around the intersection area is supposed to be a result of the heavy lattice distortion in the case of the type-I twin intersection. Under a local stress concentration, some nanotwins were observed to nucleate at the ledges on the incoherent twin boundary of the incident twin tip. Some dislocation dissociations at the ledges may be responsible for nucleation of these nanotwins. These nanotwins within the triangular striated region propagate with a homogeneous 1/6 [11 (2) over bar] twinning dislocation glide mechanism. The propagation of nanotwins can accommodate the lattice distortion of the triangular striated region without any crack at the nanotwin boundaries. (C) 1999 Elsevier Science Ltd. All rights reserved.
部门归属	univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china. acad sinica, inst met res, atom imaging solids lab, shenyang 110015, peoples r china.;zhang, lc (reprint author), univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china
关键词	Titanium Aluminides Defects Defects Based On Tial Dislocation Planar Faults Twinning Geometry And Arrangement Deformed Ti-45al-10nb Alloy Alpha(2)/gamma Interfacial Structure Electron-microscopy 2-phase Microstructure Transformation Tem
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WOS记录号	WOS:000082951600006
引用统计	被引频次：7[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/321006/37576
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. C. Zhang,G. L. Chen,J. G. Wang,et al. Formation of a triangular striated structure in the twin intersection area in gamma-TiAl during room-temperature deformation[J]. Intermetallics,1999,7(11):1241-1245.
APA	L. C. Zhang,G. L. Chen,J. G. Wang,&H. Q. Ye.(1999).Formation of a triangular striated structure in the twin intersection area in gamma-TiAl during room-temperature deformation.Intermetallics,7(11),1241-1245.
MLA	L. C. Zhang,et al."Formation of a triangular striated structure in the twin intersection area in gamma-TiAl during room-temperature deformation".Intermetallics 7.11(1999):1241-1245.