601 SiC 粒子強化 Al 基複合材料の疲労強度に及ぼす T7 熱処理の影響

概要

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The influence of the T7 heat treatment exerted on AC4CH metal matrix composite (MMC) reinforced with 20vol.% SiCParticle was considered from various angles. The obtained results is as follow. (1) As for MMC, the improvement in on the strength with as fast fatigue strength as the improvement in about 60% was found by T7 heat treatment. This showed that T7 heat treatment of MMC did big improvement to the fatigue characteristic. (2) There was no big variation in the S-N diagram of both of material, and inclination was almost the same. This can be considered to be the result of toughness value maintenance having been useful with the fault prescription processing which is the characteristic of T7 heat treatment (3) The measurement result of SEM was arranged using the extremum probability method. Consequently, the crack of a SiC particle suited the downward tendency of T7 material rather than F material. As for this, the T7 material is considered because high compression remains stress occurred also 1.4 times to a SiC particle rather than F material.
一般社団法人日本機械学会の論文
2002-08-23