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首页> 外文期刊>Journal of Materials Engineering and Performance >The Effect of Post-weld Heat Treatment on the Corrosion Behavior of Different Weld Zones of Titanium Ti-6Al-4V Alloy by Friction Stir Welding
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The Effect of Post-weld Heat Treatment on the Corrosion Behavior of Different Weld Zones of Titanium Ti-6Al-4V Alloy by Friction Stir Welding

机译：焊接热处理对钛TI-6AL-4V合金不同焊接区摩擦搅拌焊接的影响

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摘要

This study aims to investigate the effect of post-weld heat treatment on the corrosion behavior of different weld zones of titanium Ti-6Al-4V alloy by friction stir welding. Thus, the friction stir welding was used to join 3-mm-thick sheets of Ti-6Al-4V titanium alloy. Then, the welded sample from the optimal conditions underwent normalized heat treatment at 950 degrees C for 1 h in an argon inert gas environment. Next, the microstructures of different weld zones were examined using field emission scanning electron microscopy (FESEM), elemental analysis via EDS, phase analysis by XRD, and corrosion behavior through potentiostat equipment in HCl 5% solution. The results obtained from post-weld heat treatment also indicated that these operations significantly enhance the potential and converge the corrosion rate of different weld zones. Specifically, if the corrosion rate of the transition zone before heat operations is around 3.5 times that of the friction stir zone and 10 times that of the base metal, this difference will be less than 2.5 times that of the friction and 4 times that of the base metal following post-weld heat treatment. The post-weld heat treatment has reduced the difference in corrosion rate across various weld zones, but it has not made any changes in the corrosion rate of welds obtained at different traverse speeds.
机译：本研究旨在研究焊后热处理对搅拌摩擦焊Ti-6Al-4V合金不同焊接区腐蚀行为的影响。因此，搅拌摩擦焊被用于连接3 mm厚的Ti-6Al-4V钛合金薄板。然后，在氩气惰性气体环境中，在950℃下对最佳条件下的焊接样品进行1小时的正火热处理。接下来，使用场发射扫描电子显微镜（FESEM）、EDS元素分析、XRD相分析以及恒电位仪在HCl 5%溶液中的腐蚀行为，对不同焊接区的微观结构进行了检查。焊后热处理的结果还表明，这些操作显著提高了不同焊接区域的电位，并使腐蚀速率趋于一致。具体而言，如果加热操作前过渡区的腐蚀速率约为搅拌摩擦区的3.5倍和母材的10倍，则该差异将小于焊接后热处理后摩擦区的2.5倍和母材的4倍。焊后热处理减少了不同焊接区域的腐蚀速率差异，但在不同横向速度下获得的焊缝的腐蚀速率没有任何变化。

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