焊管2026，Vol.49Issue(5)：24-32,9.DOI:10.19291/j.cnki.1001-3938.2026.05.004
基于搅拌摩擦搭接增材的6082-T6铝合金微观组织演变与力学性能分析
Microstructural Evolution and Mechanical Properties of 6082-T6 Aluminum Alloy Processed by Friction Stir Additive Manufacturing
张子杰 1任鹏 1蔡奇峰 1叶继业 2曹庚 1刘延 1张伟程 1张华1
作者信息
- 1. 北京石油化工学院 机械工程学院,北京 102617
- 2. 北京它山石精密机械有限公司,北京 101125
- 折叠
摘要
Abstract
To address the issue of defects prone to occur in 6082-T6 aluminum alloy during traditional melt-based additive manufacturing,a friction stir additive manufacturing method was proposed for the additive manufacturing of multi-layer 6082-T6 aluminum alloy.Then,a systematic investigation was conducted to characterize the microstructure evalution patterns and their correlations with mechanical properties.Using rolled 6082-T6 aluminum alloy as the substrate and an H13 tool steel stirring tool,five-layer well-formed additive parts were obtained under the process parameters of a single-layer additive thickness of 2 mm,a tool rotation speed of 800 r/min,an additive speed of 160 mm/min,and a plunge depth of 0.1 mm.Characterization and mechanical propertiy evaluation were conduct using OM,EBSD,SEM,hardness testing,and tensile testing.Dynamic recrystallization occurred in the additive zone,presenting fine equiaxed grains with an average grain size of 2.71 μm,accompanied by an increase in the fraction of high-angle grain boundaries to 72%and a significant decrease in dislocation density.The additive zone contained Al5FeSi and Mg2Si phases,among which Mg2Si was an important strengthening phase,and its ability to enhance the mechanical properties of the additive zone was superior to that of fine grain strengthening.Along the additive height,the closer to the bottom of the additive zone,the more thermal cycles it experienced,and the greater the degree of dissolution of the Mg2Si strengthening phase.The microhardness and tensile strength of the additive zone increased along the additive height,with the highest values at the top(65.4 HV0.1 and 210 MPa,respectively),and the fracture surface exhibited a typical ductile fracture mode.The findings indicate that the FSAM technology can effectively produce well-formed 6082-T6 aluminum alloy components.Futhermore,the study clarifies the intrinsic relationship between microstructure and mechanical properties,thereby providing theoretical and experimental support for optimizing the FSAM process for this alloy.关键词
搅拌摩擦增材制造/6082-T6铝合金/韧性断裂/细晶强化Key words
friction stir additive manufacturing(FSAM)/6082-T6 aluminum alloy/ductile fracture/grain refinement strengthening分类
矿业与冶金引用本文复制引用
张子杰,任鹏,蔡奇峰,叶继业,曹庚,刘延,张伟程,张华..基于搅拌摩擦搭接增材的6082-T6铝合金微观组织演变与力学性能分析[J].焊管,2026,49(5):24-32,9.
