摘要
采用固溶淬火-预时效-温变形-最终时效的形变热处理工艺处理了AA7085铝合金,重点研究了形变热处理过程中温变形程度对AA7085铝合金组织和性能的影响。通过使用金相显微镜、扫描电镜分析了微观组织,并对不同变形条件下的材料进行了力学性能测试。结果表明:在形变热处理过程中,随着温变形程度的增加,材料变形带增多,材料的抗拉强度和屈服强度增加,而伸长率逐渐降低。变形带和晶界上不连续析出的η'-Mg Zn2强化相导致材料强度增加,而逐渐增多的交叉变形带使材料塑性降低。
The AA7085 aluminum alloy was treated by the thermal-mechanical treatment process of solid solution quenching-pre-aging-warm deformation-final aging. The influences of warm deformation degree on the microstructure and properties of AA7085 aluminum alloy were studied in the process of thermal-mechanical treatment. The microstructure was analyzed by using metallographic microscope and scanning electron microscope, and the mechanical properties of the materials were tested under different deformation conditions. The results show that in thermal-mechanical treatment process,with the increase of the warm deformation degree, the deformation band of the material increases, the tensile strength and yield strength of the material increase, but the elongation decreases. The deformation band and discontinuous strengthening phase precipitation of η'-Mg Zn2 in the grain boundary lead to increase the strength of the material, while gradually increased cross deformation band reduces plasticity of material.
出处
《热加工工艺》
CSCD
北大核心
2018年第2期220-223,共4页
Hot Working Technology
基金
陕西理工大学博士启动基金项目(SLGQD15-10)
关键词
AA7085铝合金
形变热处理
组织
性能
AA7085 aluminum alloy
thermal-mechanical treatment
microstructure
property