Paper number 526


Akira Fukushima, Chikara Fujiwara, Yukio Kawachi, and Kouichi Yasuhira

Research Institute of Advanced Material Gas-Generator
1-13-4 Kitaohtsuka, Toshima-ku, Tokyo, 170-0004, Japan

Summary Isothermal fatigue properties of unidirectional SCS-6 /SP700 (Ti-4.5Al-3V-2Fe-2Mo(wt%)) metal matrix composites (MMCs) were evaluated. The objective in this study is to examine the fatigue properties of SCS-6/SP700, the temperature dependence on its fatigue life and the effect of the fiber exposure at the side edge of the specimen on its fatigue life. Load-controlled high cycle fatigue tests were conducted at RT (293 K), 543 K and 673 K in order to evaluate the isothermal fatigue properties. All data at the different temperature in this study are in relatively narrow range. There is no remarkable effect of fiber exposure on the fatigue life. While microstructures of specimens with and without fiber exposure indicate the difference in fracture mode.
Keywords Titanium matrix composites, SP700, titanium alloy, SCS-6, silicon carbide, high cycle fatigue, fractography, crack initiation.

Theme : Metal Matrix Composites ; Characterisation and Modelling

[ HOME ]  [ BACK ]