Products from AlSi10Mg manufactured by selective laser melting (SLM) have porosity defects, and most of the pores in the molten base metal cannot escape during welding. This study performed AlSi10Mg oscillating laser filler welding by optimising the assembly gap to reduce the melting of the base metal. The pore distribution characteristics, microstructure and mechanical properties of welded joints were analysed. The results show that the porosity for a type I 0 mm gap is 11.16%. When a 12° V-groove is adopted, the dilution rate of the base material decreases and the porosity is 6.53%. When a type I 1 mm gap is adopted, the porosity was further reduced to 1.37%, the tensile strength of the specimen was increased to 277 MPa.
FrazierWE. Metal additive manufacturing: a review. J Mater Eng Perform2014; 23: 1917–1928.
2.
WuJWangXWangW, et al.Microstructure and strength of selective laser melted AlSi10Mg. Acta Mater2016; 117: 311–320.
3.
BallAKBasakA. Numerical investigation of the thermal distortion in multi-laser powder bed fusion (ML-PBF) additive manufacturing of inconel 625. Chin J Mech Eng: Addit Manuf Front2023; 2: 100103.
4.
MaLNiJZhangY, et al.Study on the TIG process of AlSi10Mg by SLM additive manufacturing. Hot Working Technol2020; 49: 63–66.
5.
CasalinoGCampanelliSLLudovicoAD. Laser-arc hybrid welding of wrought to selective laser molten stainless steel. Int J Adv Manuf Technol2013; 68: 209–216.
6.
YuHLiFYangJ, et al.Investigation on laser welding of selective laser melted Ti–6Al–4V parts: weldability, microstructure and mechanical properties. Mater Sci Eng A2018; 712: 20–27.
7.
NahmanyMRosenthalIBenishtiI, et al.Electron beam welding of AlSi10Mg workpieces produced by selected laser melting additive manufacturing technology. Addit Manuf2015; 8: 63–70.
8.
NahmanyMSternAAghionE, et al.Structural properties of EB-welded AlSi10Mg thin-walled pressure vessels produced by AM-SLM technology. J Mater Eng Perform2017; 26: 4813–4821.
9.
NahmanyMHadadYAghionE, et al.Microstructural assessment and mechanical properties of electron beam welding of AlSi10Mg specimens fabricated by selective laser melting. J Mater Proc Technol2019; 270: 228–240.
10.
ZhangCBaoYZhuH, et al.A comparison between laser and TIG welding of selective laser melted AlSi10Mg. Opt Laser Technol2019; 120: 105696.
11.
WangCHeDCuiL, et al.Improved tensile strength of welded AlSi10Mg alloys by using laser metal deposition. Sci Technol Weld Join2023; 28: 946–954.
12.
WuSLiZQiE, et al.Impact of Nb on microstructure and properties of oscillating laser-CMT hybrid welding joints of A7204P-T4 aluminium alloy sheets. Sci Technol Weld Join2021; 26: 273–278.
13.
TanZZhangZLiuF, et al.Effect of beam oscillation frequency on porosity in laser welding of aluminum alloy lap-butt joints. Sci Technol Weld Join2024; 29: 124–133.
14.
WangLGaoMZhangC, et al.Effect of beam oscillating pattern on weld characterization of laser welding of AA6061-T6 aluminum alloy. Mater Des2016; 108: 707–717.
15.
WangZOliveiraJPZengZ, et al.Laser beam oscillating welding of 5A06 aluminum alloys: microstructure, porosity and mechanical properties. Opt Laser Technol2019; 111: 58–65.
16.
XuKXLeiZHuangRS, et al.Effects of oscillation parameters on weld formation and porosity of titanium alloy narrow-gap laser wire filling welding. Chin J Lasers2021; 48: 0602111.
17.
ChaurasiaPKBarikBKDasA, et al.Evaluating porosity formation in gas metal arc directed energy deposition of an aluminium alloy. Sci Technol Weld Join2025; 30: 14–24.
18.
WangTDaiSLiaoH, et al.Pores and the formation mechanisms of SLMed AlSi10Mg. Rapid Prototyp J2020; 26: 1657–1664.
19.
YinZXipingSLiyanC, et al.Fatigue lifetime of laser-MIG hybrid welded joint of 7075-T6 aluminum alloy by in-situ observation. Rare Metal Mater Eng2017; 46: 2411–2416.
20.
YangKVRometschPJarvisT, et al.Porosity formation mechanisms and fatigue response in Al–Si–Mg alloys made by selective laser melting. Mater Sci Eng A2018; 712: 166–174.
21.
LiHQiPZhouJ, et al.Effect of different welding materials on microstructure and properties of 6008-T7 aluminum alloy welded joints. Welded Pipe2022; 45: 32–40.
