Deformation-induced gamma <->alpha phase transformation in a hot-forged Ti-45Al-10Nb alloy

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	Deformation-induced gamma <->alpha phase transformation in a hot-forged Ti-45Al-10Nb alloy; Deformation-induced gamma <->alpha phase transformation in a hot-forged Ti-45Al-10Nb alloy
	J. G. Wang; L. C. Zhang; G. L. Chen; H. Q. Ye; T. G. Nieh
	1997 ; 1997
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing ; Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093 ; 0921-5093
卷号	240 页码:287-292
摘要	Deformation-induced gamma --> alpha(2) and alpha(2) --> gamma phase transformations in a hot-forged Ti-45Al-10Nb alloy have been investigated by using high-resolution transmission electron microscopy (HREM). The gamma --> alpha(2) transformation is an interface-related process, which involves the emission of the interfacial superdislocations from the misoriented semi-coherent alpha(2)/gamma interface. These superdislocations further react with each other or with the moving dislocations in gamma phase and results in the formation of alpha(2) phase. On the other hand, the deformation-induced alpha(2) --> gamma phase transformation nucleates either at the alpha(2)/gamma interfaces or at the stacking faults on the basal plane of alpha(2) phase. The growth of gamma plate is accomplished by the moving of a/6 < <10(1)over bar 0> > Shockley partials on alternate basal plane (0001)(alpha 2). The interfaces as well as the crystallographic orientation relationship between the as-cast or deformation-induced alpha(2) and gamma phase have been analyzed. The mechanisms for the deformation-induced gamma --> alpha(2) and alpha(2)-gamma phase transformations were also discussed. (C) 1997 Elsevier Science S.A.; Deformation-induced gamma --> alpha(2) and alpha(2) --> gamma phase transformations in a hot-forged Ti-45Al-10Nb alloy have been investigated by using high-resolution transmission electron microscopy (HREM). The gamma --> alpha(2) transformation is an interface-related process, which involves the emission of the interfacial superdislocations from the misoriented semi-coherent alpha(2)/gamma interface. These superdislocations further react with each other or with the moving dislocations in gamma phase and results in the formation of alpha(2) phase. On the other hand, the deformation-induced alpha(2) --> gamma phase transformation nucleates either at the alpha(2)/gamma interfaces or at the stacking faults on the basal plane of alpha(2) phase. The growth of gamma plate is accomplished by the moving of a/6 < <10(1)over bar 0> > Shockley partials on alternate basal plane (0001)(alpha 2). The interfaces as well as the crystallographic orientation relationship between the as-cast or deformation-induced alpha(2) and gamma phase have been analyzed. The mechanisms for the deformation-induced gamma --> alpha(2) and alpha(2)-gamma phase transformations were also discussed. (C) 1997 Elsevier Science S.A.
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. univ calif lawrence livermore natl lab, livermore, ca 94551 usa.;wang, jg (reprint author), univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china ; 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. univ calif lawrence livermore natl lab, livermore, ca 94551 usa.;wang, jg (reprint author), univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china
关键词	Intermetallic Compound Intermetallic Compound Titanium Aluminide Titanium Aluminide Deformation-induced Phase Deformation-induced Phase Transformation Transformation Hrem Hrem Microstructure Microstructure Transmission Electron-microscopy Transmission Electron-microscopy Gamma-titanium Aluminides Gamma-titanium Aluminides Interfacial Interfacial Boundaries Boundaries Intermetallic Alloys Intermetallic Alloys
URL	查看原文 ; 查看原文
WOS记录号	WOS:000071868000041 ; WOS:000071868000041
引用统计	被引频次：12[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/321006/38123
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. Deformation-induced gamma <->alpha phase transformation in a hot-forged Ti-45Al-10Nb alloy, Deformation-induced gamma <->alpha phase transformation in a hot-forged Ti-45Al-10Nb alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1997, 1997,240, 240:287-292, 287-292.
APA	J. G. Wang,L. C. Zhang,G. L. Chen,H. Q. Ye,&T. G. Nieh.(1997).Deformation-induced gamma <->alpha phase transformation in a hot-forged Ti-45Al-10Nb alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,240,287-292.
MLA	J. G. Wang,et al."Deformation-induced gamma <->alpha phase transformation in a hot-forged Ti-45Al-10Nb alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 240(1997):287-292.