摘要
研究了时效时间对一种新研制的Al-Cu-Li系合金组织性能的影响。研究发现:在不同时效状态下,该合金析出了δ′,T1,θ′,θ″,σ等第二相,时效过程中析出T1相始终保持稳定的数量和尺寸,θ″相随着时效的进行不断减少并且最终消失。力学性能随着析出相的种类和数量的不同而改变,T1相对合金起到了很好的强化效果,δ′相和θ′相的复合强化有效地改善了合金的力学性能,σ相对该合金的强化作用优于θ′相。
Basal investigation of a new type Al-Cu-Li alloy was carried out. The peak-aging of the new type Al-Cu-Li alloy was determined through tensile tests and the Transmission Electron Microscopy （TEM） was used to investigate the microstructure of the experimental alloy. Precipitates δ′,T1,σ,θ′,θ″were found in the alloy. The mechanical properties changing with different kinds and amount of precipitates were analyzed. The work showed that the compound effect of precipitation δ′ and θ′ attribute to the matrix strengthening and that the strengthening effect of precipitation a was more effective than precipitation θ′Precipitation θ″ kept decreasing with aging process and disappeared at last. The qualitative relationship of mechanical properties and microstructure was established.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第12期41-45,共5页
Journal of Materials Engineering
关键词
铝锂合金
力学性能
显微组织
Al-Cu-Li alloy
mechanical property
microstructure
