Improvement of Fatigue Strength in JIS ADC12 Die-casting by Local Squeezing

Abstract

  The local squeezing method with pin was adopted to prevent internal defects such as gas blowholes and shrinkage porosities in the local area of ADC12 die-castings. This treatment remarkably improved the fatigue strength of the die-castings. The smaller the size and density of defects, the higher is the fatigue strength is.