材料工程2024，Vol.52Issue(2)：155-163,9.DOI:10.11868/j.issn.1001-4381.2022.000381
固溶处理对激光选区熔化AlSi10Mg合金显微组织、拉伸性能和残余应力的影响
Effect of solid solution treatment on microstructure,tensile properties and residual stress of selective laser melted AlSi10Mg alloy
唐鹏钧 1闫泰起 2陈冰清 2郭绍庆 2李沛勇1
作者信息
- 1. 中国航发北京航空材料研究院,北京 100095||北京市先进铝合金材料及应用工程技术研究中心,北京 100095
- 2. 中国航发北京航空材料研究院,北京 100095
- 折叠
摘要
Abstract
The influence of solid solution treatment on microstructure,tensile properties and residual stress of AlSi10Mg alloy prepared by selective laser melting was investigated by optical microscope,field emission scanning electron microscope,transmission electron microscope,tensile tests and Raman spectrometer.The results indicate that the as-built alloy has a fine microstructure and high strength,but there is obvious anisotropy and significant residual tensile stress.Both the ultimate tensile strength and the yield strength can be improved significantly by direct artificial aging treatment for as-built alloy.However,the morphologies of molten pools and eutectic silicon of aged alloy are as basically same as that of as-built alloy.The solid solution treatment can remarkably improve the anisotropy of microstructure and tensile property,and completely eliminate the residual tensile stress.Meanwhile,it also leads to structural coarsening,resulting in the ultimate tensile strength and yield strength are only about 50%of as-built alloy.For the solid solution treated alloy,there is no obvious change of microstructure,anisotropy and residual stress after artificial aging treatment.The ultimate tensile strength and yield strength reach 330 MPa and 270 MPa respectively,with the elongation after fracture about 10%-11%.The improvement of strength after artificial aging treatment is attributed to the precipitation of GP zone.关键词
激光选区熔化/AlSi10Mg合金/固溶处理/显微组织/拉伸性能/残余应力Key words
selective laser melting/AlSi10Mg alloy/solid solution treatment/microstructure/tensile property/residual stress分类
矿业与冶金引用本文复制引用
唐鹏钧,闫泰起,陈冰清,郭绍庆,李沛勇..固溶处理对激光选区熔化AlSi10Mg合金显微组织、拉伸性能和残余应力的影响[J].材料工程,2024,52(2):155-163,9.
