Optimized Combinatorial Properties of an AlMgSi(Cu) Alloy Achieved by a Mechanical-Thermal Combinatorial Process

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 751-758
• 页数: 8页
• 语种: 英文

摘要

Enhancing combinatorial properties,such as excellent corrosion resistance,high strength and good ductility combined,is an important issue for manufacturing high-quality AlMgSi(Cu) alloys.Here,we show that this can be achieved by optimizing a combinatorial process consisting of pre-ageing,cold-rolling and post-ageing to tailor the hierarchical microstructures of the alloy.Transmission electron microscopy analysis reveals that the enhanced combinatorial properties of corrosion resistance,strength and ductility are owing to modification of grain boundary microstructure in good association with changes of precipitate microstructures and a more homogenous distribution of solute atoms,as compared with the microstructures of the alloy processed by thermal ageing only.