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首页> 外文期刊>Proceedings of the institution of mechanical engineers >A study on the effect of cooling on microstructure and mechanical properties of friction stir-welded AA5086 aluminum butt and lap joints
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A study on the effect of cooling on microstructure and mechanical properties of friction stir-welded AA5086 aluminum butt and lap joints

机译：冷却对摩擦搅拌焊接AA5086铝对接和圈接头微观结构和力学性能的研究

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摘要

In this paper, the effect of water cooling on mechanical properties and microstructure of AA5086 aluminum joints during friction stir welding is investigated. For doing so, the mechanical and microstructural behavior of samples welded both in air and in water was analyzed. Tests were performed involving both butt and lap welds and the results were compared. The effect of rotational speed at constant feed rate of 50mm/min and changing rotational speed ranging from 250 to 1250r/min was investigated. The results showed a significant change in the tensile behavior of the butt-welded specimens due to water cooling. In addition, welding was performed at constant spindle speed of 800r/min and various traverse speeds (25mm/min to 80mm/min) to determine the effect of feed rate. The strength increases at first, but then decreases dramatically along with the feed rate which is due to the occurrence of a groove defect. Results showed some generally positive impacts of water cooling which are discussed in terms of tensile results, hardness distributions and microstructure analysis.
机译：本文研究了水冷却对摩擦搅拌焊接期间AA5086铝接缝机械性能和微观结构的影响。为此这样做，分析了空气和水中焊接样品的机械和微观结构行为。进行涉及对接和LAP焊缝的测试，并比较结果。研究了恒定进给速率的旋转速度为50mm / min的效果，并研究了从250至1250r / min的转速变化的转速。结果表明，由于水冷，对接焊接试样的拉伸行为显着变化。另外，焊接以800r / min的恒定主轴速度和各种横向速度（25mm / min至80mm / min）进行，以确定进料速率的效果。强度首先增加，但随后随着凹槽缺陷的发生而显着降低。结果表明，水冷的一些大致积极影响，其在拉伸结果，硬度分布和微观结构分析方面讨论。

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