In this work, a novel ultrahigh-strength Al-10Zn-3.5Mg-1.5Cu alloy was fabricated by powder metallurgy followed by hot extrusion. Investigations on microstructural evolution and mechanical properties of the fabricated samples were carried out. The results show that the grain size of sintered samples matches with the powder particles after ball milling. The relative densities of sintered and hot extruded samples reach 99.1% and 100%, respectively. Owing to the comprehensive mechanism of grain refinement, aging and dispersion strengthening, the ultimate tensile strength, yield strength and elongation of the Al-10Zn-3.5Mg-1.5Cu alloy after hot extrusion and subsequent heat treatment achieve 810 MPa, 770 MPa and 8%, respectively.

在这项工作中，通过粉末冶金然后热挤压制造了一种新型的超高强度Al-10Zn-3.5Mg-1.5Cu合金。对制备的样品的微观结构演变和力学性能进行了研究。结果表明，球磨后烧结样品的晶粒尺寸与粉末颗粒相匹配。烧结和热挤压样品的相对密度分别达到99.1％和100％。由于晶粒细化，时效和弥散强化的综合机理，热挤压和后续热处理后的Al-10Zn-3.5Mg-1.5Cu合金的极限拉伸强度，屈服强度和伸长率达到810 MPa，770 MPa和8 ％， 分别。