Influence of material and mechanical properties on thermal fatigue life of aluminum castings

摘要

There is an ever increasing need for weight reduction and high performance of engine (clean smoke and improving fuel economy). To achieve this, recently aluminum castings are used for engine parts such as cylinder heads that construct combustion chamber and are required thermal resistance. This paper describes thermal fatigue tests of aluminum castings that are made under various conditions of cooling rate during solidification, heat treatment, and chemical compositions. It further investigates the influence of material (such as cooling rate, chemical composition and heat treatment) and mechanical properties (such as σ{sub}B, δ, E) on thermal fatigue life of aluminum castings.