ENHANCED FATIGUE-CRACK GROWTH RESISTANCE AT ELEVATED-TEMPERATURE IN TIC/TI-6AL-4V COMPOSITE - MICROCRACK-INDUCED CRACK CLOSURE

被引：18
|
作者：
LIU, G
ZHU, D
SHANG, JK
机构：
[1] Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, 61801, IL
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1995年 / 26卷 / 01期
关键词：
D O I：
10.1007/BF02669801
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fatigue crack growth behavior of TiC/Ti-alloy composite was examined at 450 degrees C and compared to the room-temperature behavior. Contrary to the temperature-dependent fatigue crack growth behavior of the monolithic alloy, fatigue crack growth resistance of the composite was improved at the elevated temperature. At 450 degrees C, the fatigue threshold of the composite was found to be 50 pet higher than at room temperature. Such an improved fatigue crack growth resistance is shown to result from extensive microcracking of reinforcing particles, which promotes fatigue crack closure at the elevated temperature.
引用
收藏
页码：159 / 166
页数：8
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