材料科学
焊接
微观结构
激光束焊接
极限抗拉强度
多孔性
合金
复合材料
振荡(细胞信号)
激光器
梁(结构)
熔池
拉伸试验
冶金
光学
钨极气体保护焊
电弧焊
生物
遗传学
物理
作者
Shangren Li,Gaoyang Mi,Chunming Wang
标识
DOI:10.1016/j.jmapro.2020.01.018
摘要
Laser beam oscillating welding was used to connect 5083 aluminum alloy sheets. The effect of oscillating parameters on the weld porosity and morphology was investigated. When the oscillating frequency was over 200 Hz and the oscillating diameter was over 2 mm, the weld porosity could be suppressed by laser beam oscillation. The microstructure analysis conducted by electron backscattered diffraction and an electron probe micro-analyzer revealed that the laser beam oscillation could refine grains and promote the uniform distribution of the β(Mg2Al3) phase in the weld fusion zone, thus leading to increasing micro-hardness of the weld zone. The tensile test results demonstrated that the tensile strength and the elongation of the laser oscillating welding joints were much higher than the joints without oscillation, mainly owing to the suppression of porosity.
科研通智能强力驱动
Strongly Powered by AbleSci AI