多向压缩对7085铝合金挤压材组织和力学性能的影响

Effect of Multi-axial Compression on Microstructure and Mechanical Properties of 7085 Aluminum Alloy Extrusions

摘要:

通过对合金进行X射线衍射（XRD）及电子背散射衍射技术（EBSD）分析、拉伸性能测试，研究了多向压缩对合金组织和力学性能的影响。结果表明：多向压缩可以显著细化合金晶粒(由87.7 μm降低到17.9 μm)，晶粒细化机制主要是动态再结晶；提高抗拉强度110 MPa，合金主要通过时效强化和固溶强化

Abstract:

The effect of multi-axial compression on microstructure and mechanical properties of 7085 aluminum alloy extrusions was investigated by X-ray diffraction (XRD), electron back-scattered diffraction (EBSD) and tensile test. The results show that multi-axial compression could refine the grain size (from 87.7 μm to 17.9 μm) with the grain refinement mechanism of dynamic recrystallization, increase the tensile strength by 110 MPa which is primarily attributed to solution strengthening and aging strengthening