發(fā)布時間：2019-01-17 14:23

【摘要】：采用KWN模型構建攪拌摩擦焊接中Al-Mg-Si系鋁合金沉淀相演化計算模型,通過將屈服強度分為晶粒大小、固溶相和析出相三部分貢獻,可以計算平板攪拌摩擦焊后的屈服強度和硬度。進一步研究不同焊后人工時效條件下,焊接平板力學性能變化的機理。結果表明:更長的焊后保溫時間有利于攪拌區(qū)力學性能的回復;較高的保溫溫度有利于攪拌區(qū)力學性能的快速回復,但是當溫度高于200℃時,長時間保溫會使母材軟化,不利于力學性能回復;通過焊后人工時效不能明顯改善熱影響區(qū)的力學性能。
[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，

本文編號：2410146