Effect of Heat Treatment on Microstructure and Mechanical Properties of High Strength Aluminum Alloy 7075 in the As-deposited State
High-strength aluminum alloys play an important role in aircraft manufacturing,espe-cially helicopter manufacturing,due to their light weight and excellent mechanical properties.The properties of these alloys can be further enhanced by employing additive manufacturing techniques and heat treatment processes.This study focused on the effect of heat treatment process on the mi-crostructure and mechanical properties of 7075 aluminum alloy with ZrCuAlNi addition.By system-atically investigating the parameters of solution treatment and aging treatment,including time and temperature,the hardness of the heat-treated alloy was significantly increased to 189.1 HV.The tensile properties of the alloy were significantly improved,with the tensile strength (UTS),yield strength (YS) and elongation (EL) reaching 566.75 MPa,519.97 MPa and 6.84％.In this pa-per,the microstructural changes in the heat treatment process and the mechanism of its effect on the improvement of mechanical properties were analyze in detail,which would provide a theoretical basis and practical guidance for the heat treatment process of high-strength aluminum alloys.
helicopterlaser powder bed meltingsigh-strength aluminum alloysolution aging treatmentmicrostructuremechanical properties
万方数据
维普
