外场对激光熔化沉积Al-Mg-Sc-Zr合金组织性能的影响

Abstract

Objective Al -Mg alloy modified by Sc/Zr microalloying is used to realize the generation of highperformance aluminum alloy materials. It has many advantages, such as high specific strength, strong corrosion resistance, low hot crack sensitivity, high thermal stability, and good creep resistance, and is widely used in aerospace, rail transit, chemical engineering, and other fields. The additive manufacturing process can adjust and control the deposition process window.Although it can inhibit the generation of solidification defects to a certain extent and improve the metallurgical structure, it is still unable to achieve the preparation of highstrength, highdensity, and highperformance aluminum alloy bulk deposition samples. Multi physical field assisted metal solidification has always been an important means to achieve traditional casting products to break dendrites, refine grains, and reduce workpiece defects, which has important reference