ΔKth estimation of aluminum die-casting alloy by means of √area method

Abstract

In order to evaluate quantitatively the effects of casting defects on the fatigue properties of aluminum die-casting alloy, a ΔKth for aluminum die-casting alloy containing large casting defects was proposed by means of √area method. Fatigue tests were carried out by using a rotating bending fatigue testing machine for the specimen having four artificial drilled holes whose √area were ranged from 300 to 2000μm. According to the fatigue limits of the hourglass type specimen and of the smooth specimens having four artificial drilled holes, equation for ΔKth estimation for aluminum die-casting alloy was proposed by means of √area method.