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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.4; Jul 7-11, 2003; Leganes, Madrid, Spain >The Effect of Thermal Treatments on the Corrosion Behavior of Friction Stir Welded 7050 and 7075Aluminum Alloys
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The Effect of Thermal Treatments on the Corrosion Behavior of Friction Stir Welded 7050 and 7075Aluminum Alloys

机译：热处理对搅拌摩擦焊接7050和7075铝合金的腐蚀行为的影响

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摘要

The rapid thermal cycle generated during friction stir welding (FSW) produces a gradient of microstructures and precipitate distributions in the weld heat affected zone (HAZ) and the thermo mechanical affected zone (TMAZ). Metallurgical transformations associated with such heating and cooling become complex under these nonequilibrium conditions, producing unstable microstructures, which cause unpredictable changes in properties relative to the parent alloy. Our work has shown that the composition changes caused by the nucleation and coarsening of precipitates during FSW produce a sensitized microstructure in 7050 and 7075 aluminum alloys. This paper describes the deleterious effects on the corrosion behavior of 7050 and 7075 aluminum alloys resulting from FSW and the effects of pre- and post- weld heat treatments on the corrosion properties of the welded material.
机译：搅拌摩擦焊（FSW）期间产生的快速热循环会在焊接热影响区（HAZ）和热机械影响区（TMAZ）中产生微观结构的梯度和沉淀物分布。在这些非平衡条件下，与这种加热和冷却相关的冶金转变变得复杂，产生不稳定的微观结构，这会导致相对于母合金的性能发生不可预测的变化。我们的工作表明，在FSW期间，由析出物的形核和粗化引起的成分变化会在7050和7075铝合金中产生敏化的微观结构。本文描述了FSW对7050和7075铝合金的腐蚀行为的有害影响，以及焊前和焊后热处理对焊接材料腐蚀性能的影响。

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