高钛6061铝合金的热变形行为（英文）

发布时间：2018-04-27 06:28

本文选题：铝合金 + 热变形　；参考：《Transactions of Nonferrous Metals Society of China》2016年02期

【摘要】：利用应力应变曲线、热加工图,结合电子透射电子显微镜和背散射衍射技术研究在变形温度为350~510°C、应变速率为0.001~10 s-1时高钛6061铝合金的热变形行为。结果表明,该合金的热压缩变形流变峰值应力随变形温度的升高和应变速率的降低而降低;在实验参数范围内平均热变形激活能为185 k J/mol;建立了流变应力模型;该合金热变形时主要的软化机制为动态回复;根据材料动态模型获得了高钛6061铝合金的热加工图,最佳的热加工窗口温度为400~440°C,应变速率为0.001~0.1 s~(-1)。
[Abstract]:The thermal deformation behavior of high titanium 6061 aluminum alloy was studied by means of stress-strain curve, hot working diagram, electron transmission electron microscope and backscatter diffraction technique at the deformation temperature of 350 掳C and strain rate of 0.001 ~ 10 s ~ (-1). The results show that the rheological peak stress of the alloy decreases with the increase of deformation temperature and the decrease of strain rate, the average activation energy of hot deformation is 185 kJ / mol in the range of experimental parameters, and the rheological stress model is established. The main softening mechanism of the alloy during hot deformation is dynamic recovery, according to the material dynamic model, the hot working diagram of high titanium 6061 aluminum alloy is obtained. The optimum temperature of hot working window is 400 ~ 440 掳C, and the strain rate is 0.001 ~ 0. 1 ~ 0. 1? s ~ (-1).
【作者单位】：燕山大学先进锻压成形技术与科学教育部重点实验室;
【分类号】：TG142.21

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