Study on the alpha(2)/gamma interfacial structures in a two-phase (alpha(2)+gamma) alloy deformed at elevated temperature

IMR OpenIR

	Study on the alpha(2)/gamma interfacial structures in a two-phase (alpha(2)+gamma) alloy deformed at elevated temperature
	J. G. Wang; L. C. Zhang; G. L. Chen; H. Q. Ye
	2000
发表期刊	Journal of Materials Science
ISSN	0022-2461
卷号	35 期号:2 页码:399-409
摘要	The details of structure modification on alpha(2/gamma) interface induced by deformation in a hot-deformed Ti-45Al-10Nb alloy were investigated by conventional and high-resolution transmission electron microscopy. A new type of dislocation ledge containing 1/3[111] partials was identified. The Burgers vectors of these dislocation ledges were determined to be 1/2[110] or 1/2[101]. The formation mechanism of this new type of dislocation ledge is discussed. Also, two types of hot deformation induced alpha(2/gamma) interfaces, coherent interfaces with high density of ledges and misoriented semi-coherent alpha(2/gamma) interfacial boundaries were observed. For the misoriented semi-coherent alpha(2 gamma) interfaces, the density of dislocation ledges in these interfaces increases with the misoriented angle between the (111)(gamma) and (0001)(alpha 2) planes, and 1/3[111] partial dislocations were involved in all the dislocation ledges. The formation mechanism of these deformation-induced alpha(2/gamma) interfaces were discussed related to the role of alpha(2/gamma) interfaces adjusting the deformation as a dislocation sink absorbing the slipping dislocations in the gamma phase. Moreover, misoriented semi-coherent alpha(2/gamma) interface related deformation twinning and structure transformation induced by deformation were analyzed and discussed related to the role of alpha(2/gamma) interfaces as a dislocation source during deformation. (C) 2000 Kluwer Academic Publishers.
部门归属	univ calif lawrence livermore natl lab, livermore, ca 94551 usa. 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.;wang, jg (reprint author), univ calif irvine, dept chem & biochem engn & mat sci, 916 engn tower, irvine, ca 92697 usa
关键词	Transmission Electron-microscopy Gamma-titanium Aluminides Ti-45al-10nb Alloy Intermetallic Alloys Mechanical Twins Boundaries Dislocations Deformation Ti3al Alpha-2
URL	查看原文
WOS记录号	WOS:000084943200021
引用统计	被引频次：1[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/321006/37184
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. G. Wang,L. C. Zhang,G. L. Chen,et al. Study on the alpha(2)/gamma interfacial structures in a two-phase (alpha(2)+gamma) alloy deformed at elevated temperature[J]. Journal of Materials Science,2000,35(2):399-409.
APA	J. G. Wang,L. C. Zhang,G. L. Chen,&H. Q. Ye.(2000).Study on the alpha(2)/gamma interfacial structures in a two-phase (alpha(2)+gamma) alloy deformed at elevated temperature.Journal of Materials Science,35(2),399-409.
MLA	J. G. Wang,et al."Study on the alpha(2)/gamma interfacial structures in a two-phase (alpha(2)+gamma) alloy deformed at elevated temperature".Journal of Materials Science 35.2(2000):399-409.