摘要
对含1.0wt%Li和不含Li的5.6wt%Zn,1.9wt%Mg,1.6wt%Cu,0.3wt%Er合金在110℃,120℃和160℃进行单级时效,并对含Li的铝合金进行110℃ 5h+160℃ 40h两级时效。由于合金中Li对GP区的抑制作用,与不含Li合金相比,含Li合金的单级时效硬化效果差。双级时效时,含Li铝合金具有较好的强化硬化效果,这与形成了η′相和T′相有关。
The 5.6wt%Zn, 1.9wt%Mg, 1.6wt%Cu, 0.3wt%Er containing 1.0wt%Li and of Li-free aluminum alloys are treated by one-step ageing at 110°C, 120°C and 160°C, and alloys containing Li is also treated by two-step ageing at 110°C/5 h + 160°C/40 h. It is the retaining effect of Li on GP zones that the hardening effect of aluminum alloys containing Li is lower during ageing compared with that of aluminum alloys of Li-free. Whereas the two-step ageing can make the aluminum alloys containing Li hardening excellently since precipitates η´ and T´ are formed in alloys.
出处
《航空材料学报》
EI
CAS
CSCD
2003年第2期6-9,共4页
Journal of Aeronautical Materials
基金
国家重点基础研究发展规划资助项目(G1 9990 6490 7)
