THE FLOW AND FRACTURE OF A TI3AL-NB ALLOY

被引：37

作者：

LUKASAK, DA ^{[1
]}

KOSS, DA ^{[1
]}

机构：

[1] PENN STATE UNIV,MET SCI & ENGN PROGRAM,UNIVERSITY PK,PA 16802

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1990年 / 21卷 / 01期

关键词：

D O I：

10.1007/BF02656431

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The deformation and fracture behavior of the titanium aluminide alloy Ti-24Al-11Nb (atomic percent) have been investigated over the temperature range of 27 °C to 500 °C. The alloy, which was examined in the "basket-weave" microstructural condition, deforms in a nonuniform manner and is characterized by plastically anisotropic flow on the scale of the prior beta grain size. As a consequence, locally severe strain incompatibilities develop near prior beta grain boundaries and contribute to microcrack initiation, which appears to be caused by a slip intersection process. The beta phase influences microcrack initiation as well as subsequent crack propagatio in both direct and indirect manners. © 1990 The Metallurgical of Society of AIME.

引用

页码：135 / 143

页数：9