Microstructural characteristics of Ti-48Al-2Cr alloy

被引：4
|
作者：
Zhang, J [1 ]
He, L [1 ]
Cui, Y [1 ]
Ye, H [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Atom Imaging Solids Lab, Shenyang 110015, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2001年 / 10卷 / 03期
关键词：
deformation; transmission; electron microscopy; intermetallic; microstructure; TiAl; twin;
D O I：
10.1361/105994901770345105
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructural characteristics of two-phase alpha (2) + gamma titanium aluminide before and after deformation are investigated by transmission electron microscopy (TEM), The orientation relationships associated with the gamma-gamma combinations can be divided into three types: true twin, order domain, and pseudo-twin, Of the three orientation relationships, true twin accounts for more than 50%, which is most likely due to a minimization of interfacial energy related to misfit and interaction energy of interface atoms. During deformation, lamellar boundaries cause different resistance to the propagation of intersecting twin, Experimental observations and theoretical analysis consistently show that the resistance has the following sequence: F-120 degrees < F-180<degrees>< F-60<degrees>< F-<alpha>2/gamma.
引用
收藏
页码：378 / 389
页数：12
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