The Dynamic Properties: Powder Forged and Surface Densified

The fatigue properties of powder metal materials manufactured under different processing routes was investigated. Materials that were press and sintered, and surface densified or powder forged (P/F) were subjected to rolling contact fatigue (RCF) and single tooth bending (STB) fatigue testing. It was found that surface densified and P/F materials showed no difference in RCF properties. In terms of STB fatigue, a P/F material was superior to a surface densified material with a densification depth of 0.13 mm (0.005 in.).