Effect of Heat Treatment on the Residual Stress and Mechanical Properties of an Additively Manufactured High Strength Aluminum Alloy
摘要
Aluminum (Al) alloys with low density are extensively used in ground transport and aerospace applications to attract fuel energy savings. While the additive manufacturing of Al alloys is not new, precipitation hardened alloys pose severe challenges due to their susceptibility to high residual stress and cracking. This study aims to report on the influence of heat treatment in minimizing the surface residual stress and improving the room temperature tensile response of a precipitation hardened high strength Al alloy (Al2139). The changes to mechanical properties will be presented by invoking the process-microstructure-property relationships.