【摘要】 研究了时效处理对轧制Al-5Fe基合金组织和断口形貌的影响。结果表明:轧制Al-5Fe基合金经过固溶时效处理后,在基体中能析出Mg2Si球状相及块状的Al-Si-Mn-Fe相和Al-Si-Mn-Fe-Mg相,随着时效时间的增加,β相在晶界上不断地析出,吸收了它附近的溶质和空位原子,形成了无析出带,使合金性能降低。断口分析表明,时效后合金的断裂方式均为韧窝断裂和沿晶断裂的混合型,断口中心的硬质粒子是断裂的发源。更多还原

【Abstract】 Effect of aging treatment on microstructure and fracture morphology of rolled Al-5Fe based alloy was investigated. The results show that after solution and aging treatment,the spherical Mg2Si phase and lumpy Al-Si-Mn-Fe phase and Al-Si-Mn-Fe-Mg phase is precipitated in the matrix of the rolled Al-5Fe based alloy. The β phase precipitated continuously at grain boundary with the increase of aging time and the solute atoms and vacancies are absorbed in the vicinity of the β phase,so a none-precipitating zone is thus formed, which reduced the alloy properties. The fracture mode of the combination of dimple fracture and intergranular fracture is observed in the fracture analysis of the alloy after aging treatment. The brittle particles at the fracture center of tensile sample are the fracture origin.更多还原