COMPATIBILITY OF DEFORMATION IN 2-PHASE TI-AL ALLOYS - DEPENDENCE ON MICROSTRUCTURE AND ORIENTATION RELATIONSHIPS
COMPATIBILITY OF DEFORMATION IN 2-PHASE TI-AL ALLOYS - DEPENDENCE ON MICROSTRUCTURE AND ORIENTATION RELATIONSHIPS
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DOI：
10.1007/bf02670762
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发表时间：
1995-07-01
影响因子：
2.8
通讯作者：
MORRIS, MA
中科院分区：
文献类型：
--
作者：
LUSTER, J;MORRIS, MA
本文研究了Ti-47.5Al-2.5Cr两相合金在两种热处理条件下的显微组织。这些由γ晶粒的片状和等轴分布组成，其中α（2）相分别以长片状或较小球状分布。测量了γ/γ和γ/α（2）晶粒之间的比旋度关系，并将其用于了解它们对相邻晶粒之间变形相容性的影响。为此，已进行了详细的分析活动滑移系统的变形样品的透射电子显微镜（TEM）观察。表征相邻晶粒间最佳滑移传递的几何相容性因子的理论计算已经以这样一种方式使用，即已经可以推断出晶粒之间的取向关系类型在产生允许变形的最大相容性的主动变形系统中所起的作用。
A two-phase alloy of composition Ti-47.5A1-2.5Cr has been studied under two heat-treated conditions in order to obtain different microstructures. These consisted of lamellar and equiaxed distributions of gamma grains in which the alpha(2) phase was distributed as long lamellae or smaller globules, respectively. The specific rotation relationships between gamma/gamma and gamma/alpha(2), grains have been measured, and these have been used to understand their effect on the compatibility of deformation across adjacent grains. For this, detailed analysis of active slip systems has been carried out by transmission electron microscopy (TEM) observations of deformed samples. A theoretical calculation of a geometric compatibility factor characterizing the best slip transfer across adjacent grains has been used in such a way that it has been possible to deduce the role played by the type of orientation relationship between grains in producing active deformation systems that allow the maximum compatibility of deformation.