WEAK GRAIN-BOUNDARIES IN NI3AL

被引：27

作者：

LIN, H

POPE, DP

机构：

[1] Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 192卷

基金：

美国国家科学基金会;

关键词：

NICKEL; ALUMINUM; GRAIN BOUNDARIES;

D O I：

10.1016/0921-5093(94)03239-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study correlates the resistance td intergranular crack initiation with grain boundary character in Ni3Al by comparing the distribution of grain boundary characters at crack initiation sites to that in the general population. Micro-cracks were initiated in Ni3Al by tensile deformation of Ni3Al ribbon/brass bar samples in a pressurized chamber, and the boundary characters were determined using the electron backscattering pattern (EBSP) method. It has been found that low-angle and Sigma 3 boundaries are strong, and are resistant to crack initiation; all high-angle boundaries, including low-Sigma (5 < Sigma < 29) boundaries, are similarly prone to crack initiation, and Sigma 15, Sigma 21, and Sigma 29 boundaries are probably some of the weak boundaries in Ni3Al.

引用

页码：394 / 398

页数：5

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