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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Shielding Gas on the Properties of AW 5083 Aluminum Alloy Laser Weld Joints
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Effect of Shielding Gas on the Properties of AW 5083 Aluminum Alloy Laser Weld Joints

机译：屏蔽气对AW 5083铝合金激光焊接接头性能的影响

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摘要

The paper deals with the evaluation of the shielding gas influence on the properties of AW 5083 aluminum alloy weld joints produced with disk laser. Butt weld joints were produced under different shielding gas types, namely Ar, He, Ar?+?5?vol.% He, Ar?+?30?vol.% He and without shielding weld pool. Light and electron microscopy, computed tomography, microhardness measurements and tensile testing were used for evaluation of weld joint properties. He-shielded weld joints were the narrowest ones. On the other hand, Ar-shielded weld joints exhibited largest weld width. The choice of shielding gas had significant influence on the porosity level of welds. The lowest porosity was observed in weld joint produced in Ar with the addition of 5?vol.% He shielding atmosphere (only 0.03%), while the highest level of porosity was detected in weld joint produced in pure He (0.24%). Except unshielded aluminum alloy weld joint, the lowest tensile strength was recorded in He-shielded weld joints. On the contrary, the highest average microhardness was measured in He-shielded weld joints.
机译：本文涉及评估屏蔽气体对用磁盘激光产生的AW 5083铝合金焊接接头的性能的评价。对接焊接接头在不同的屏蔽气体类型下产生，即AR，他，AR？+？5？5？VOL。％他，AR？+ 30？30？卷。％他和没有屏蔽焊接池。光和电子显微镜，计算机断层扫描，微硬度测量和拉伸试验用于评估焊接接头性能。他屏蔽的焊接接头是最窄的焊接接头。另一方面，Ar屏蔽焊接接头表现出最大的焊接宽度。屏蔽气体的选择对焊缝的孔隙率水平具有显着影响。在AR中制作的焊接接头中观察到最低孔隙率，加入5？Vol.％HE屏蔽气氛（仅0.03％），而在纯HE（0.24％）中产生的焊接接头中检测到最高水平的孔隙率。除了非屏蔽铝合金焊接接头外，最低的拉伸强度被记录在HE屏蔽的焊接接头中。相反，在他屏蔽的焊接接头中测量了最高的平均微硬度。

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