Fatigue strength and fatigue crack propagation in injection molded TiAl.
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概要
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This paper describes the fatigue strength and fatigue crack propagation (FCP) at ambient temperature in injection molded titanium aluminide, TiAl. Axial fatigue tests and FCP experiments have been conducted on injection molded materials which were sintered at 1350°C and 1400°C. The fatigue strength and FCP resistance of the injection molded materials were considerably lower than those of the cast material, and the material sintered at 1400°C showed higher fatigue strength and FCP resistance than the material sintered at 1350°C. These results may be attributed to many pores contained in the injection molded materials or in the material sintered at lower temperature, and also due to the difference in microstructure. The SEM examination of fracture surfaces revealed that translamellar cleavage, interlamellar cleavage, and cleavage of equiaxed gamma grains were predominant modes of fatigue failure in the injection molded materials.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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