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本文对两种工业用时效硬化铝合金6063和6082进行了不同时效处理.其中6063合金的Mg和Si含量较低,弥散相体积分数极低;而6082合金的Mg和Si含量较高,弥散相体积分数也较高.本文对两种合金在不同时效状态下的组织及拉伸断裂行为进行了研究.结果表明,工业用时效硬化Al-Mg-Si合金在不同时效状态下均呈现以韧窝型为主的拉伸断口.大尺寸夹杂相对合金的拉伸断裂行为的影响最为显著.高弥散相含量的6082合金完全消除了沿晶开裂现象,而低弥散相含量的6063合金仍具有少部分沿晶断口.表现出弥散相对合金拉伸断裂行为的有利作用.
In this paper, two kinds of industrial age-hardened aluminum alloys 6063 and 6082 were treated with different aging treatments, of which, the content of Mg and Si in the 6063 alloy was low and the volume fraction of the dispersed phase was extremely low. However, the content of Mg and Si in the 6082 alloy was high, The volume fraction is also higher.This paper studies the microstructure and tensile fracture behavior of the two alloys under different aging conditions.The results show that the aging aging Al-Mg-Si alloys in all aging states show dimples Type.The tensile fracture behavior of the large size inclusions is the most significant.The 6082 alloy with high dispersed phase completely eliminates the intergranular cracking and the 6063 alloy with low dispersed phase still has a small part The intergranular fracture shows the beneficial effect of dispersion relative to the tensile fracture behavior of the alloy.