铝合金搅拌摩擦焊后人工时效力学性能数值模拟
发布时间：2019-01-17 14:23
【摘要】：采用KWN模型构建搅拌摩擦焊接中Al-Mg-Si系铝合金沉淀相演化计算模型,通过将屈服强度分为晶粒大小、固溶相和析出相三部分贡献,可以计算平板搅拌摩擦焊后的屈服强度和硬度。进一步研究不同焊后人工时效条件下,焊接平板力学性能变化的机理。结果表明:更长的焊后保温时间有利于搅拌区力学性能的回复;较高的保温温度有利于搅拌区力学性能的快速回复,但是当温度高于200℃时,长时间保温会使母材软化,不利于力学性能回复;通过焊后人工时效不能明显改善热影响区的力学性能。
[Abstract]:The evolution model of precipitate phase of Al-Mg-Si series aluminum alloy in friction stir welding was constructed by using KWN model. The yield strength was divided into three parts: grain size, solid solution phase and precipitated phase. The yield strength and hardness after friction stir welding can be calculated. The mechanism of mechanical properties change of welded plate under different artificial aging conditions after welding was studied. The results show that longer holding time after welding is beneficial to the recovery of mechanical properties in the stirring zone. The higher holding temperature is conducive to the quick recovery of mechanical properties in agitation zone, but when the temperature is higher than 200 鈩，
本文编号：2410146
[Abstract]:The evolution model of precipitate phase of Al-Mg-Si series aluminum alloy in friction stir welding was constructed by using KWN model. The yield strength was divided into three parts: grain size, solid solution phase and precipitated phase. The yield strength and hardness after friction stir welding can be calculated. The mechanism of mechanical properties change of welded plate under different artificial aging conditions after welding was studied. The results show that longer holding time after welding is beneficial to the recovery of mechanical properties in the stirring zone. The higher holding temperature is conducive to the quick recovery of mechanical properties in agitation zone, but when the temperature is higher than 200 鈩，
本文编号：2410146
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