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
唐漫 1刘志义 1柏松 1李苏望1
作者信息
- 1. 中南大学 材料科学与工程学院,湖南 长沙 410083
- 折叠
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.
Abstract
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 of Ω phase and improve coarsening resistance of Ω phase 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Key words
Al-Cu-Mg-Ag alloy/mechanical properties/grain refinement/heat exposure/microalloying/Cr引用本文复制引用
出版年
2024
NETL
NSTL
万方数据