宁夏大学学报（自然科学版）2025，Vol.46Issue(4)：367-376,10.DOI:10.20176/j.cnki.nxdz.20251204
再生ADC12铝合金的Y-Sr-T6热处理协同改性
Synergistic Modification of Recycled ADC12 Aluminum Alloy Through Y-Sr-T6 Heat Treatment
摘要
Abstract
This study investigates the effects of adding different mass fractions of rare earth elements Yttrium(Y),and Strontium(Sr),in conjunction with the T6 heat treatment process(solution treatment-artificial aging),referred to as Y-Sr-T6,on the micro-structure and mechanical properties of recycled ADC12 aluminum alloy.The results demonstrate that Y-Sr-T6 significantly refines the micro-structure of the alloy and thereby enhances its mechanical performance.When w(Y)=0.2%and w(Sr)=0.03%,the refinement effect of T6 heat treatment on the alloy's micro-structure was most pronounced,with the eutectic silicon phase being transformed from coarse plate-like structures into homogeneous rounded particles,and the needle-like β-Al5FeSi phase transitioning from a fishbone-like shape to a blocky form.The volume fraction of super-large grains(grain size greater than 95 μm)was substantially reduced,decreasing by 94.7%compared to the unmod-ified alloy;the secondary dendrite arm spacing(SDAS)was reduced by 82.1%.The tensile strength and elon-gation of the aluminum alloy were increased to 370.61 MPa and 4.34%,respectively,representing improve-ments of 29.0%and 226.3%compared to the unmodified alloy.This synergistic modification method provides a new approach for enhancing the performance of recycled aluminum alloys and offers potential for increasing the utilization rate of recycled aluminum and reducing carbon emissions in the aluminum industry.关键词
再生ADC12铝合金/Y-Sr-T6热处理协同改性/力学性能/显微组织Key words
recycled ADC12 aluminum alloy/Y-Sr-T6 synergistic modification/mechanical properties/micro-structure分类
矿业与冶金引用本文复制引用
LI Wanqiu,CHEN Siyu,XIA Mingxu..再生ADC12铝合金的Y-Sr-T6热处理协同改性[J].宁夏大学学报（自然科学版）,2025,46(4):367-376,10.基金项目
国家自然科学基金资助项目(U24A2006) （U24A2006）
国家重点研发计划国际合作项目(2022YFE0138000) （2022YFE0138000）
