【摘要】 通过室温力学性能检测、扫描电镜和透射电镜观察,研究了不同时效制度对Al-Cu-Mg-Ag合金组织和性能的影响。结果表明,在145～185℃进行人工时效时,同一时效温度下,随时效时间的延长,抗拉强度在165℃出现峰值,随时效温度的升高峰值左移,即达到峰值的时效时间缩短。合金在165℃时效时,其峰值时效时间为6 h,纵向和横向性能较为接近,其纵向强度σ_b为472 MPa,σ₀₂为455 MPa,对应的伸长率为12．68%。更多还原

【Abstract】 The effects of aging process on the microstructure and properties of Al-Cu-Mg-Ag alloy were studied by using the methods of microstructure observation（TEM and SEM）combined with the mechanical property test.The results show that the tensile strength reaches the maximum value at 165℃with artificial aging temperatures ranging from 145℃to 185℃;the maximum strength at different temperatures is shifted from right to left with arising temperature, namely aging time to the maximum strength becomes short.The maximum strength of Al-Cu-Mg-Ag alloy lies in the peak-aging 165℃x 6 h,and it’s transverse strength is close to longitudinal strength,σ_b,σ_0.2andδis 472MPa,455MPa and 12.68%,respectirely.更多还原