Microstructure and Mechanical Properties of Galvanized Steel/AA6061 Joints by Laser Fusion Brazing Welding

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英文篇名：Microstructure and Mechanical Properties of Galvanized Steel/AA6061 Joints by Laser Fusion Brazing Welding 作者：Junxia ; L ; Wuxiong ; Yang ; Shikai ; Wu ; Xudong ; Zhao ; Rongshi ; Xiao 英文作者：Junxia L;Wuxiong Yang;Shikai Wu;Xudong Zhao;Rongshi Xiao;Institute of Laser Engineering,Beijing University of Technology; 英文关键词：Galvanized steel;;Aluminium alloy;;Laser welding;;Interface;;Microstructural characterization;;Mechanical property 中文刊名：JSXY 英文刊名：金属学报(英文版) 机构：Institute of Laser Engineering,Beijing University of Technology; 出版日期：2014-08-15 出版单位：Acta Metallurgica Sinica(English Letters) 年：2014 期：v.27 基金：financially supported by the National Natural Science Foundation of China (No.50875005);; Beijing Natural Science Foundation (No.3102005) 语种：英文; 页：JSXY201404017 页数：7 CN：04 ISSN：21-1361/TG 分类号：116-122

摘要

Laser fusion brazing welding was proposed.Galvanized steel/AA6061 lapped joint was obtained by laser fusion brazing welding technique using the laser-induced aluminium molten pool spreading and wetting the solid steel surface.Wide joint interface was formed using the rectangular laser beam coupled with the synchronous powder feeding.The result showed that the tiny structure with the composition of a-Al and Al–Si eutectic was formed in the weld close to the Al side.And close to the steel side,a layer of compact Fe–Al–Si intermetallics,including the Al-rich FeAl3,Fe2Al5 phases and Al–Fe–Si s1 phase,was generated with the thickness of about 10–20 lm.Transverse tensile shows the brittlefractured characteristic along to the seam/steel interface with the maximum yield strength of 152.5 MPa due to the existence of hardening phases s1 and Al–Fe intermetallics.
        Laser fusion brazing welding was proposed.Galvanized steel/AA6061 lapped joint was obtained by laser fusion brazing welding technique using the laser-induced aluminium molten pool spreading and wetting the solid steel surface.Wide joint interface was formed using the rectangular laser beam coupled with the synchronous powder feeding.The result showed that the tiny structure with the composition of a-Al and Al–Si eutectic was formed in the weld close to the Al side.And close to the steel side,a layer of compact Fe–Al–Si intermetallics,including the Al-rich FeAl3,Fe2Al5 phases and Al–Fe–Si s1 phase,was generated with the thickness of about 10–20 lm.Transverse tensile shows the brittlefractured characteristic along to the seam/steel interface with the maximum yield strength of 152.5 MPa due to the existence of hardening phases s1 and Al–Fe intermetallics.

引文

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