Thermo-mechanical fatigue (TMF) tests were conducted on the 15 and 28 vol.% SiCW/6061Al composites under temperature cycling between 150 and 300 °C and mechanical strain ranges of 0.004-0.012. The effects of temperature-load phase and volume fraction of SiC whiskers on the TMF behavior were examined. The results showed that cyclic softening occurred in both composites during out-of-phase (OP) and in-phase (IP) TMF. In both composites, tensile mean stress was generated during OP-TMF, whereas compressive mean stress was generated during IP-TMF. The 15% SiCW composite demonstrated a longer life than the 28% SiCW composite in the case of OP-TMF, however, in the case of IP-TMF the fatigue life curves of the two composites passed across each other, i.e. at small strain range level the life of the 15% SiCW composite was longer than that of 28% SiCW composite, while at large strain range level, the life of the former composite became shorter than that of the latter composite.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering