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金属学报  2001 

强化固溶对Al-Zn-Mg-Cu合金力学性能和断裂行为的影响

, PP. 29-33

Keywords: 铝合金,强化固溶,力学性能

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Abstract:

研究了强化固溶对提高7075和7055铝合金力学性能的效果.结果表明,逐步升温固溶处理可使最终固溶温度超过多相共晶温度而不产生过烧组织,提高残余可溶结晶相的固溶程度和合金力学性能.强化固溶的7075和7055合金的抗拉强度分别达到660和750MPa,且延伸率保持约10%.一般固溶7055合金的强度仅与强化固溶7075合金的强度相当断口分析显示,两种合金的断裂属晶内韧窝断裂与沿晶断裂的混合断裂.强化固溶后,残余结晶相引起的晶内韧窝断裂减少,沿晶断裂增加

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