轧制变形量对Al-5Zn-3Mg-1Cu合金显微组织和力学性能的影响

发布时间：2018-04-15 12:33

本文选题：铝合金 + 轧制变形　；参考：《华南理工大学学报(自然科学版)》2015年11期

【摘要】：采用室温拉伸试验、Kahn撕裂试验,结合光学显微镜、透射电子显微镜等方法,研究了Al-5Zn-3Mg-1Cu铝合金厚板在热轧过程中随轧制变形量增大其合金组织和力学性能的演变过程.结果表明:热轧变形过程中,变形量从56%增大至91%时,合金的再结晶分数由0.49%增大至43.30%,晶粒尺寸从83μm减小至10μm以下,合金的抗拉强度和屈服强度分别从542.3和520.0 MPa提升到593.4和564.9 MPa,延伸率从8.0%左右提高到11.2%;随轧制变形量的增大,合金撕裂强度和单位面积裂纹形核功呈增大的趋势.
[Abstract]:The room temperature tensile test, Kahn test, combined with optical microscopy, transmission electron microscopy and other methods to study the evolution of Al-5Zn-3Mg-1Cu Aluminum Alloy plate in hot rolling process with the rolling deformation increases its microstructure and mechanical properties. The results show that the hot deformation process, deformation increases from 56% to 91%, recrystallization the fraction of alloy increases from 0.49% to 43.30%, the grain size decreases from 83 m to 10 m, the tensile strength and yield strength respectively from 542.3 and 520 to 593.4 MPa and 564.9 MPa, the elongation rate increased from 8% to 11.2%; with the increase of amount of rolling deformation, tear strength alloy and per unit area crack nucleation energy increases.

【作者单位】：中南大学材料科学与工程学院;
【基金】：国家重点基础研究计划项目(2012CB619501) 国际科技合作专项项目(2013DFG51890)~~
【分类号】：TG146.21;TG339

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