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采用拉伸试验、X射线衍射分析(XRD)、电子背散射衍射分析(EBSD)、晶间腐蚀试验和剥落腐蚀试验等方法,研究了压缩大变形(20%压缩、45%压缩)对7085铝合金固溶-时效组织性能的影响。结果表明:压缩大变形能提高合金的拉伸强度(从440.9 MPa分别提升到481.2 MPa和514.5 MPa),显著细化晶粒尺寸(平均晶粒尺寸从31.580μm分别降低到7.414μm和6.469μm),压缩大变形还能提高合金的抗晶间腐蚀性能和抗剥落腐蚀性能,定量分析显示,压缩大变形处理显著提高了位错强化和小角度强化的总强化。
The effects of compressive deformation (20% compression and 45% compression) on the microstructure and mechanical properties of 7085 aluminum alloy were investigated by means of tensile test, XRD, EBSD, intergranular corrosion test and exfoliation corrosion test. Effect of Solution and Aging Microstructure on Alloys. The results show that the large deformation can increase the tensile strength of the alloy (from 440.9 MPa to 481.2 MPa and 514.5 MPa, respectively) and remarkably refine the grain size (the average grain size decreases from 31.580μm to 7.414μm and 6.469μm, respectively) , Large deformation can improve the alloy’s intergranular corrosion resistance and anti-spalling corrosion performance. Quantitative analysis shows that the large deformation deformation treatment significantly enhances the total strengthening of dislocation strengthening and small angle strengthening.