摘要
采用硬度测试、力学性能测试以及金相、拉伸断口扫描电镜观察等方法,研究热处理对Al-Zn-Mg-Cu-Ag合金组织和力学性能的影响。结果表明,T8态的Al-Zn-Mg-Cu-Ag合金的力学性能明显强于T6态的。在T6态峰时效状态下拉伸断口形貌主要是沿晶断裂模式,呈现"冰糖状",而T8态的合金拉伸断口表现为沿晶断裂和穿晶断裂的混合模式,说明T8态有利于改善合金的断裂方式。
The effect of aging treatment on microstructure and mechanical properties of Al- Zn-Mg-Cu-Ag alloys were investigated by hardness testing, mechanical properties testing, optical microscope （OM） and scanning electron microscopy （SEM）. The results show that mechanical properties of Al-Zn-Mg-Cu-Ag alloys at T8 are significantly stronger than those at T6. Tensile fracture morphology in peak-aging is characterized by intergranular modes at T6 and mixed intergranular and transgranular modes at T8. It reveals that the fracture mode is liable to be improved at T8.
出处
《轻合金加工技术》
CAS
北大核心
2016年第7期40-43,共4页
Light Alloy Fabrication Technology
