摘要
微量Er和Zr添加是提升6系铝合金力学性能的有效途径,然而微量Er和Zr添加后固溶时效工艺对力学性能的影响机制研究仍不充分。本文研究通过硬度和拉伸性能测试等方法,综合分析固溶-时效过程中添加微量Er和Zr(0、0.1Er+0.1Zr(%)和0.2Er+0.2Zr(%))对6082铝合金力学性能的影响。结果表明,添加Er和Zr对不同固溶温度(530、540、550、560℃)下6082铝合金硬度变化趋势影响较小,较优固溶工艺为540℃×0.5 h。在170℃时效过程中(0~12 h),添加Er和Zr后的Er+Zr/6082铝合金布氏硬度均在8 h时达到峰值,相比于6082铝合金峰时效时间提前2 h。Er和Zr添加降低Mg2Si相的热力学形核能,加快了时效期间Mg2Si相生长和演变过程。
The research shows that trace Er and Zr addition is an effective way to improve the mechanical properties of 6-series aluminum alloys,but the influence mechanism of trace Er and Zr addition on the mechanical properties during solid solution aging is still insufficient.The effect of trace Er and Zr addition(0,0.1Er+0.1Zr(%)and 0.2Er+0.2Zr(%))on the mechanical properties of 6082 Al alloy during solid solution aging was investigated by hardness,tensile tests and electron microscopy methods.The results show that the addition of Er and Zr has little effect on the hardness change of 6082 Al alloy at different solution temperatures(530,540,550 and 560℃),with the best solution process of 540℃ for 0.5 h.During the aging process at 170℃(0-12 h),the Brinell hardness of Er+Zr/6082 Al alloy after the addition of Er and Zr reaches its peak at 8 h,2h earlier than that of 6082 Al alloy.The addition of Er and Zr reduces the thermodynamic nucleation of Mg2Si phase,and accelerates the growth and evolution of Mg_(2)Si phase during aging.
作者
杜明星
冷金凤
李展志
殷玉虎
DU Mingxing;LENG Jinfeng;LI Zhanzhi;YIN Yuhu(School of Materials Science and Engineering,University of Jinan,Jinan 250022,China;Key Laboratory for Light-Weight Materials,Nanjing Tech University,Nanjing 211816,China;D.MAG New Material Technology Co.,Ltd.,Kunshan 215300,Jiangsu,China)
出处
《有色金属科学与工程》
CAS
北大核心
2024年第1期139-146,共8页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(51871111)。
