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oe1(光电查) - 科学论文

2 条数据
?? 中文（中国） ▾

  • Design of laser welding applied to T joints between steel and aluminium

    摘要： Laser conduction welding was used to directly join DH36 steel to AA5083 aluminium alloy in a T joint configuration, each plate with 6 mm of thickness. The effect of the process energy (via power density and interaction time) on the joint integrity and quality in terms of cracking, porosity and intermetallic compound layer formation was investigated. Successful T joints were produced by melting of the aluminium plate, which was inserted into a 4 mm deep groove machined on the steel plate, with the heat generated by the laser irradiation on the steel surface. The IMC layer thickness was less than 5 μm. Although cracking was observed along the IMC layer with higher levels of energies, the joints were still strong due to the mechanical inter-locking effect resulting from the novel design of the component, whereby the IMCs were subjected to compressive state of stress while loading.

    关键词： Aluminium,Dissimilar metal joining,Steel,Joint design,Laser welding,T joint,Intermetallic compounds

    更新于2025-09-19 17:13:59

  • Laser welding of dissimilar copper and aluminum sheets by shaping the laser pulses

    摘要： Dissimilar metal joining of thin copper and aluminum sheets is very important in the battery connections. The main problem while joining this dissimilar combination is formation of brittle intermetallic phases that degrade the electrical and mechanical properties of the joint. For joining copper and aluminum sheet with laser, very high intensity in the range of 107 W/cm2 is required. Intermixture of copper and aluminum is vital for joint ductility. In this paper, the effect of combined oscillation and shaping of the laser pulses on the overlap welding of copper-aluminum is studied. Precise control of intermixing can be achieved by modifying the laser pulse i.e. the percentage of power with respect to the pulse time. Investigation on different pulse shapes with ramp up and ramp down profile is conducted by cross-section and microstructural analysis.

    关键词： Pulse modulation,Dissimilar metal joining,Cu-Al joints,Laser welding,Intermettalic compounds (IMC)

    更新于2025-09-12 10:27:22