Microstructure and mechanical properties of magnesium alloy AZ31B joint brazed with Al-Mg-Zn filler metal - Details

Author：

Ma, Li (Ma, Li.) (Scholars：李明爱) | He, Dingyong (He, Dingyong.) (Scholars：贺定勇) | Li, Xiaoyan (Li, Xiaoyan.) | Jiang, Jianmin (Jiang, Jianmin.) | Wang, Lizhi (Wang, Lizhi.)

Indexed by：

EI Scopus PKU CSCD

Abstract：

High-frequency　induction　brazing　of　wrought　magnesium　alloy　AZ31B　with　Al-Mg-Zn　filler　metal　was　investigated.　Microscopic　structure,　the　phases　and　the　mechanical　properties　of　brazed　joint　were　studied.　The　microstructure　and　formation　phases　at　the　interface　in　the　brazed　joint　were　investigated　by　scanning　electron　microscopy(SEM),　X-ray　diffraction　instrument(XRD)　and　energy　dispersive　spectrometer　(EDS).　The　strength　of　the　brazed　joint　and　the　microhardness　of　the　formation　phases　were　also　tested.　The　results　show　that,　Al-Mg-Zn　filler　metal　reacting　with　the　base　metal　AZ31B,　and　α-Mg+β-Mg17(Al,　Zn)12　divorced　eutectic　structure　is　formed　in　the　brazed　joint.　Microhardness　of　the　base　metal　AZ31B　is　the　smallest　and　β-Mg17(Al,　Zn)12　phase　of　the　brazed　joint　is　the　hardest.　Both　the　butt　joint　and　the　overlap　joint　exhibit　intergranular　fracture　mode,　the　fracture　comes　from　hard　brittle　phase　β-Mg17(Al,　Zn)12　of　α-Mg+β-Mg17(Al,　Zn)12　divorced　eutectic　structure.

Keyword：

Aluminum alloys Filler metals Magnesium metallography Textures Zinc alloys Fillers Microhardness Scanning electron microscopy Metals Joints (structural components) Spectrometers Aluminum metallography Ternary alloys Brazing Zinc metallography Eutectics Magnesium alloys

Author Community：

[ 1 ] [Ma, Li]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [He, Dingyong]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Li, Xiaoyan]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Jiang, Jianmin]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Wang, Lizhi]Welding Research Institute of Central Research Institute of Building and Construction, China Metallurgical Group Corporation, Beijing 100088, China