Endurance Tests of Magnesium Casting Alloy Dow H Containing Various Drades of Transverse and Longitudinal Microshrinkage

摘要

A magnesium casting alloy, containing various degrees of transverse and longitudinal microshrinkage, was evaluated in fatigue for the correla-tion of the fatigue strength with the degree of dispersed discontinuity. It was established that the fatigue strength of Dow H magnesium casting alloy decreased as the quantity of radiographic defect indications increased, and that longitudinal microsbrinkage was less detrimental to fatigue strength than transverse microshrinkage.