Impact Fracture Characteristics of Sintered Ni Alloy Steels by Metal Injection Molding

Abstract

Sintered Ni alloy steels produced by Metal Injection Molding (MIM) process showed the high density and high static fracture strength than that of the same composition materials produced by the conventional Powder Metallurgy (P/M). However, there are very few reports about the dynamic fracture characteristics of Fe-Ni-C MIM steels at the present time. In this study, the behavior of impact fracture characteristics for the sintered Ni alloy steels produced by MIM process varying Ni content from 2 to 8 mass% were investigated. The impact strength were improved with increasing Ni content, especially the improvement was remarkable in the low testing temperature.