摘要
研究LD5棒材超塑性变形工艺参数与力学性能的关系。结果表明,LD5铝合金棒材经过495℃×3h固溶、390℃×4.5h过时效+360℃自由镦拔的预处理后,当超塑性变形温度为455℃时,拉伸最佳的变形速率为3.35×10-3mm/s,最高伸长率为475%,相应的流动应力为17MPa。当超塑性变形温度为460℃时压缩最佳的变形速率为2×10-2mm/s,最大伸长率为598%,相应流动应力为21MPa。预处理方法是提高LD5铝合金塑性、降低变形抗力的高效、低成本方法。
The relationship between the technical parameters of LD5 alloy super-plastic deformation and the mechanical performance is investigated. The results show that after pretreatment of solution heat treatment(495℃×3h), over aged disposal(390℃×4.5h), upsetting and drawing(360℃ ), the optimal strain rate of LD5 alloy is 3.35 × 10^-3mm/s, the maximum elongation is 475%, the flow stress is 17MPa at the deformation temperature 455℃. However, at deformation temperature 460℃, the corresponding data of LD5 alloy are 2×10^-2ram/s, 598% and 21MPa, respectively.
出处
《有色金属》
CSCD
北大核心
2006年第3期20-22,共3页
Nonferrous Metals
关键词
金属材料
LD5铝合金
超塑性
预处理
变形
力学性能
metal material
LD5 alloy
super-plastic
pretreatment
deformation
mechanical behavior