シリンダヘッド用アルミ合金の人工時効による材料改質効果 : 非弾性変形挙動と熱疲労特性に対する影響

概要

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Past efforts for aluminum alloys used for engines were focused on chemical compositions rather than heat treatment conditions of the aluminum alloys. Then, there are a few studies on optimizations of the heat treatment conditions. This paper treats artificial aging effects on two aluminum alloys such as AC 4 C and AC 2 B used for cylinder heads of engines. The aluminum alloys are subjected to additional heat treatments during several time periods after T 6 heat treatments. The effects of the aging time on the mechanical behaviors such as pure tension, cyclic loading, and thermo-mechanical fatigue failure are observed by a series of tests. The microstructural observation is also carried out by TEM to clarify the effects of microstructural change of the aluminum alloys on the mechanical behaviors.
2002-04-25