粉末冶金技术2025，Vol.43Issue(5)：568-576,9.DOI:10.19591/j.cnki.cn11-1974/tf.2024050003
固溶时间对AlFeNiCoCr高熵合金颗粒增强7075铝基复合材料的显微组织与力学性能影响
Effect of solution time on microstructure and properties of AlFeNiCoCr high entropy alloy particle reinforced 7075 aluminum matrix composites
摘要
Abstract
AlFeNiCoCr high entropy alloy powders were prepared by the atomization method,and the AlFeNiCoCr high entropy alloy particle reinforced 7075 aluminum matrix composites((AlFeNiCoCr)p/7075Al)were prepared by cold isostatic pressing combined with equal-channel angular pressing.The(AlFeNiCoCr)p/7075Al composites were subjected to solution treatment at 490 ℃ for different times.The influence of solution time on the microstructure and mechanical properties of the(AlFeNiCoCr)p/7075Al composites was investigated.The results show that the solution treatment intensifies the movement of atoms.A transition layer with high strength interface bonding is formed between the high-entropy alloy reinforcement particles and the Al matrix by element infiltration.A good bonding interface can effectively transfer loads,thereby significantly improving the comprehensive performance of the composites.When the solution treatment lasts for 1.5 h,the mechanical properties of the composites are the best.The tensile strength,elongation,and hardness are 507.14 MPa,11.43％,and HV 158.27,respectively;compared with the 7075A1 alloy matrix,the tensile strength and hardness are improved significantly.When the solution treatment lasts for 3.0 h,due to the long duration of the solution treatment,the low-melting-point Al and Ni elements are separated from the transition layer.The proportion of the solute elements in the original transition layer becomes unbalanced.The Cr element combines with Al and Mg in the matrix to form the Al18Mg3Cr2 phase.After the solution treatment for 3.0 h,the holes appear in the composites,the 7075A1 alloy particles became coarse,the transition layers start to disappear,the interface bonding between the reinforcement and the matrix deteriorates,and the composite performance seriously declines.关键词
7075铝合金/铝基复合材料/AlFeNiCoCr高熵合金/固溶时间Key words
7075 aluminum alloys/aluminum matrix composites/AlFeNiCoCr high entropy alloys/solution time分类
矿业与冶金引用本文复制引用
万金华,冯文,贺毅强,董琦,彭亚珍,顾航,王英杰,冯立超,王童,薛浩..固溶时间对AlFeNiCoCr高熵合金颗粒增强7075铝基复合材料的显微组织与力学性能影响[J].粉末冶金技术,2025,43(5):568-576,9.基金项目
江苏省自然科学基金资助项目(BK20201467) （BK20201467）
江苏省"333高层次人才培养工程"科研资助项目(BRA2020260) （BRA2020260）
江苏省研究生科研与实践创新计划项目(KYCX2023-05) （KYCX2023-05）
江苏省高等学校自然科学研究项目(18KJB430008) （18KJB430008）
连云港市科技项目(CG2227) （CG2227）
