Abstract
The effect of high pressure solidification on the fatigue strength of cast aluminum and aluminum alloys was studied.
(1) The fatigue limit of pure aluminum is hardly influenced by high pressure solidification.
(2) High pressure casting of an eutectic Al-Si alloy (JIS AC3A and AC4C)
(3) The fatigue limit of an Al-Cu alloy (AC1A), T-6 treated, is increased by approximately 10% by casting under high pressure.
(4) High pressure casting produces an increase of the fatigue limit of an Al-Mg alloy (AC7A), although the pressure larger than 2, 000kg/cm2 has an inverse effect caused by pronounced segregation.
