铬含量对Al-Cu-Mg-Ag合金微观组织和热暴露性能的影响  

Effect of Cr Content on Microstructure and Heat Exposure of Al⁃Cu⁃Mg⁃Ag Alloy

作　　者：唐漫 刘志义[1] 柏松[1] 李苏望 TANG Man;LIU Zhiyi;BAI Song;LI Suwang(School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2024年第3期166-169,175,共5页Mining and Metallurgical Engineering

摘　　要：研究了Cr含量对Al-Cu-Mg-Ag合金微观组织和热暴露性能的影响。结果表明,随着Cr含量增加,合金室温强度呈先上升后下降的变化趋势,含0.2%Cr的合金表现出优异的室温力学性能。透射定量计算结果表明,向合金中添加0.2%Cr,促进了热暴露后合金中Ω相的析出,提高了Ω相的抗粗化性能。Cr添加量超过0.3%后,合金晶界处析出(Al,Cr,Mn,Ti)富集相,导致晶粒粗大。The effect of Cr content on microstructure and heat exposure of Al-Cu-Mg-Ag alloys was investigated.It is found that strength of the alloys at room temperature decreases after an initial increase as Cr content increases,and the 0.2%Cr alloy exhibits excellent room-temperature mechanical properties.Transmission quantitative calculation results suggest that an addition of 0.2%Cr can promote precipitation ofΩphase and improve coarsening resistance ofΩphase in the alloy after heat exposure.With the addition of Cr exceeding 0.3%,the(Al,Cr,Mn,Ti)-enriched phases precipitate at the grain boundaries of the alloy,leading to coarser grains.

关 键 词：AL-CU-MG-AG合金 力学性能 晶粒细化 热暴露 微合金化 铬 

分 类 号：TB302[一般工业技术—材料科学与工程]