摘要
采用拉伸实验、透射电镜和光学金相法 ,研究了固溶处理水淬后较大程度冷变形对2 0 14铝合金时效后组织和性能的影响·结果指出 :采用较大变形程度 (6 5 % )冷轧 ,再进行低温短时间时效 (16 0℃ ,30min) ,可使 2 0 14合金的强度得到显著提高 (σb=5 6 8MPa) ,其延伸率 (δ =11 6 % )仍不低于常规时效处理 (固溶处理 ,水淬 ,16 0℃ ,12h)的延伸率 ;经这样冷变形的 2 0 14合金 ,在稍高温度短时间回复处理 ,将导致时效强化能力显著降低·
The effect of 65% cold rolling after solution treatment and water quenching on the tensile properties and microstructures of commercial grade 2014 aluminum alloy was investigated by means of tensile test, transmission electron microscope and optical microscope. By means of 65%cold rolling after solution treatment and artificial aging at 160?℃ for 30 min, the sheet of 2014 alloy retaining elongation ( δ =11 6%) can obtain higher strength ( σ b=568?MPa) than that obtainable with conventional treatment (solution treatment and water quenching, then 160?℃,12?h), and the capacity of age hardening of this cold deformed 2014 alloy can be decreased markedly by short time recovery at higher temperature before aging.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第6期664-667,共4页
Journal of Northeastern University(Natural Science)
基金
国家重点基础研究发展规划项目 (G19990 6 490 0 9 4)
关键词
2014合金
铝合金
形变热处理
时效
固溶处理
冷轧
强度
延伸率
alloy
aluminum alloy
thermomechanical treatment
aging
precipitates
recovery
subgrains
deformation bands
