Substructures of deformation twins and twin intersections in a Ti-45Al-8Nb-2.5Mn alloy heavily deformed at room temperature

IMR OpenIR

	Substructures of deformation twins and twin intersections in a Ti-45Al-8Nb-2.5Mn alloy heavily deformed at room temperature
	L. C. Zhang; G. L. Chen; H. Q. Ye
	2001
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	299 期号:1-2 页码:267-274
摘要	Substructures of deformation twins and twin intersections have been investigated by transmission electron microscopy (TEM) in a heavily-deformed Ti-45Al-10Nb-2.5Mn (at.%) alloy. The deformation twins become severely bent after blocking numerous matrix dislocations. The (111)(DT) plane in the twins exhibits a misorientation angle with the (111)(M) plane in the matrix, and numerous 1/3[111] Frank partial dislocations appear in the twin boundaries. Furthermore, the barrier twins also become bent after being intersected by numerous incident twins. The barrier twin boundaries in two types of twin intersections show different tilting directions due to different orientations of the incident twinning dislocations relative to the barrier twins. Some special nano-scale substructures appear simultaneously at the intersection area in order to relax the large stress concentration of several twin-band intersections. The propagation of several incident twin tips in the same direction could induce the formation of small-angle tilting grain boundaries in the intersection area of the type-I. The opposite propagation of several incident twin tips could induce a triangular striated region near the intersection area. Some nanotwins nucleate and propagate with a homogeneous twinning shear mechanism, and were limited mostly in the triangular striated region. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属	beijing univ sci & technol, 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), max planck inst eisenforsch gmbh, postfach 140444, d-40074 dusseldorf, germany
关键词	Tial Deformation Twin Twin Intersection Heavy Deformation Substructure Titanium Aluminides Ti-45al-10nb Alloy Electron-microscopy 2-phase Transformation Microstructure Tem
URL	查看原文
WOS记录号	WOS:000166559700029
引用统计	被引频次：14[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/321006/36904
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,H. Q. Ye. Substructures of deformation twins and twin intersections in a Ti-45Al-8Nb-2.5Mn alloy heavily deformed at room temperature[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2001,299(1-2):267-274.
APA	L. C. Zhang,G. L. Chen,&H. Q. Ye.(2001).Substructures of deformation twins and twin intersections in a Ti-45Al-8Nb-2.5Mn alloy heavily deformed at room temperature.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,299(1-2),267-274.
MLA	L. C. Zhang,et al."Substructures of deformation twins and twin intersections in a Ti-45Al-8Nb-2.5Mn alloy heavily deformed at room temperature".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 299.1-2(2001):267-274.