Adhesive is used in the laser weld bonding Mg to A1 alloys process, in order to improve the property of laser welding joint. The effect of adhesive on the microstrnctures in laser weld bonding AZ31B Mg alloy to 6061Al...Adhesive is used in the laser weld bonding Mg to A1 alloys process, in order to improve the property of laser welding joint. The effect of adhesive on the microstrnctures in laser weld bonding AZ31B Mg alloy to 6061Al alloy are observed by scanning electron microscopy and transmission electron microscope. The results show that the decomposition of the adhesive makes influence on the crystal structure of the Mg fusion zone, which forms the C-Mn precipitates. The morphology of Mg-Al intermetallics is changed, when the adhesive decomposition gas bubble floats out of the fusion zone. Dislocations are formed at the bottom of Al fusion zone with the effect of adhesive decomposition and pulse laser power.展开更多
Zinc coated dual phase 600 steel （DP 600 grade） was investigated, utilisation of which has gradually increased with each passing day in the automotive industry. The adhesive bonding （AB）, resistance spot welding ...Zinc coated dual phase 600 steel （DP 600 grade） was investigated, utilisation of which has gradually increased with each passing day in the automotive industry. The adhesive bonding （AB）, resistance spot welding （RSW）, and adhesive weld bonding （AWB） ioints of the zinc coated DP 600 steel were investigated. Additionally, the zinc coating was removed using HCL acid in order to investigate the effect of the coating. The microstructure, tensile shear strengths, and fracture properties of adhesive bonding （AB）, resistance spot welding （RSW）, and adhesive weld bonding （AWB） joints of the coated and uncoated DP 600 steel were compared. In addition, a mechani cal-electrical-thermal coupled model in a finite element analysis environment was utilised. The thermal profile phe nomenon was calculated by simulating this process. The results of the tensile shear test indicated that the tensile load bearing capacity （TLBC） values of the coated specimens among the three welding methods were higher than those of the uncoated specimens. Additionally, the tensile strength of the AWB joints of the coated and uncoated specimens was higher than that of the AB and RSW joints. It was determined that the fracture behaviours and the deformation caused were different for the three welding methods.展开更多
基金Acknowledgements The authors gratefully acknowledge tile sponsorship from China Postdoctoral Science Foundation （2102M510803 ） and Doctoral Scientific Research Foundation of Liaoning Province （ No. 201 11024）.
文摘Adhesive is used in the laser weld bonding Mg to A1 alloys process, in order to improve the property of laser welding joint. The effect of adhesive on the microstrnctures in laser weld bonding AZ31B Mg alloy to 6061Al alloy are observed by scanning electron microscopy and transmission electron microscope. The results show that the decomposition of the adhesive makes influence on the crystal structure of the Mg fusion zone, which forms the C-Mn precipitates. The morphology of Mg-Al intermetallics is changed, when the adhesive decomposition gas bubble floats out of the fusion zone. Dislocations are formed at the bottom of Al fusion zone with the effect of adhesive decomposition and pulse laser power.
文摘Zinc coated dual phase 600 steel （DP 600 grade） was investigated, utilisation of which has gradually increased with each passing day in the automotive industry. The adhesive bonding （AB）, resistance spot welding （RSW）, and adhesive weld bonding （AWB） ioints of the zinc coated DP 600 steel were investigated. Additionally, the zinc coating was removed using HCL acid in order to investigate the effect of the coating. The microstructure, tensile shear strengths, and fracture properties of adhesive bonding （AB）, resistance spot welding （RSW）, and adhesive weld bonding （AWB） joints of the coated and uncoated DP 600 steel were compared. In addition, a mechani cal-electrical-thermal coupled model in a finite element analysis environment was utilised. The thermal profile phe nomenon was calculated by simulating this process. The results of the tensile shear test indicated that the tensile load bearing capacity （TLBC） values of the coated specimens among the three welding methods were higher than those of the uncoated specimens. Additionally, the tensile strength of the AWB joints of the coated and uncoated specimens was higher than that of the AB and RSW joints. It was determined that the fracture behaviours and the deformation caused were different for the three welding methods.
