Effects of γ' Precipitation on the Structure and Properties of 713LC Superalloy via HIP Treatment

Abstract

This study aimed to examine the TEM observation of γ' precipitate morphology on 713LC superalloy via HIP treatment, and evaluate the effects of HIP treatment on the 713LC alloy. The experimental results showed that an obvious distribution of γ' precipitations appeared in the γ matrix for 713LC superalloy after HIP treatment. It also demonstrated that the grain sizes are uniform and the porosity of the structure is improved. The strengthening mechanism of the γ' phase was Ni 3Al precipitates, and it increased the strengthened phase and mechanical properties of 713LC superalloy. Meanwhile, the porosity decreased to 60.3%, hardness increased to 40.5 HRC, and density enhanced to 7.92 × 10 3 kg/m 3. Thus, this study confirmed that tensile strength and elongation of 713LC superalloy can be increased through HIP treatment. © 2012 The Japan Institute of Metals.