INVESTIGATION OF ROOM-TEMPERATURE AND ELEVATED-TEMPERATURE FATIGUE CRACK-GROWTH IN TI-48AL

被引:52
作者
SOBOYEJO, WO [1 ]
DEFFEYES, JE [1 ]
ASWATH, PB [1 ]
机构
[1] BROWN UNIV,DIV ENGN,PROVIDENCE,RI 02912
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 138卷 / 01期
基金
美国国家科学基金会;
关键词
D O I
10.1016/0921-5093(91)90679-H
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The results of a recent investigation of fatigue crack growth in the gamma-based Ti-48at.%Al alloy are presented. These include room- and elevated-temperature fatigue crack growth and crack closure data obtained at two stress ratios and temperatures. The possible role of oxide-induced closure at elevated temperatures is explored by use of a previously reported theoretical model, scanning Auger microscopy, and X-ray diffraction techniques. The results of deformation studies of the crack-tip region are also presented, and the micromechanisms of fatigue crack growth are elucidated.
引用
收藏
页码:95 / 101
页数:7
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