固溶处理对7A52/7B52铝合金叠层板力学性能和断裂行为的影响

来源 :第六届海内外中华青年材料科学技术研讨会暨第十五届全国青年材料科学技术研讨会 | 被引量 : 0次 | 上传用户：jack88698

【摘要】

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【作者】

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祝国川

【机构】

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北京有色金属研究总院

【出处】

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第六届海内外中华青年材料科学技术研讨会暨第十五届全国青年材料科学技术研讨会

【发表日期】

：

2015年6期

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　　本文研究了固溶处理对7A52/7B52铝合金叠层板力学性能和断裂行为的影响.采用力学拉伸实验、夏比冲击实验测试了叠层板的力学性能.采用扫描电子显微镜(SEM)和电子背散射衍射(EBSD)研究了平均晶粒尺寸、再结晶晶界比例及断口形貌等微观组织特征和断裂行为的关系.建立了固溶处理与力学性能和断裂行为的联系.结果表明,经过475℃/1h固溶后,7B52合金回溶效果较好,抗拉强度(Rm)为659MPa,延伸率(A)为12％.7B52合金组织中粗大第二相和再结晶晶粒对材料的断裂行为有着显著的影响,合金拉伸变形时穿晶和沿晶断裂交替进行,但以穿晶断裂为主；夏比冲击时主要为沿晶断裂.

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