刘文辉 邱群 周凡 陈宇强.T6时效和T6I4时效对7N01铝合金高温动态力学性能与组织演化的影响[J].稀有金属材料与工程,2018,47(1):311~316.[liuwenhui.Effects of T6 and T6I4 ageing treatments on the dynamic mechanical properties and microstructure evolution of 7N01 aluminum alloy at highStemperature[J].Rare Metal Materials and Engineering,2018,47(1):311~316.]
T6时效和T6I4时效对7N01铝合金高温动态力学性能与组织演化的影响
投稿时间:2015-11-30  修订日期:2016-03-10
中文关键词:  7N01铝合金  时效  动态力学性能  析出相
基金项目:国家自然科学基金(51475162,51405153);湖南省自然科学基金重点项目(14JJ5015)
中文摘要:
      采用分离式霍普金森压杆、金相显微镜、透射电镜研究了T6和T6I4两种时效处理工艺对7N01铝合金高温动态力学性能及组织演化的影响。结果表明:两种时效态的7N01铝合金的动态屈服应力均随应变速率的提高而增大。随着温度的升高,合金动态屈服应力降低,位错密度下降。在150℃和250℃条件下,T6I4态铝合金的动态屈服应力较T6态铝合金高。而350℃条件下,T6I4态铝合金析出相基本回溶,T6态铝合金析出相明显粗化,T6I4态铝合金的动态屈服应力较T6态铝合金低。
Effects of T6 and T6I4 ageing treatments on the dynamic mechanical properties and microstructure evolution of 7N01 aluminum alloy at highStemperature
英文关键词:7N01 aluminum alloy  aging treatment  dynamic mechanical properties  precipitate
英文摘要:
      The effects of T6 and T6I4 aging treatments on dynamic mechanical properties and microstructure evolution of 7N01 aluminum alloy at high temperatures were investigated by using the split Hopkinson pressure bar(SHPB), Optical Microscopy(OM) and Transmission Electron Microscopy(TEM). The results show that the dynamic yield stresses of T6I4 and T6 aging state 7N01 aluminum alloy increase with the increasing strain rate. The dynamic yield stress and dislocation density descend with the increasing temperature. The dynamic yield stress of 7N01-T6I4 aluminum alloy is higher than that of 7N01-T6 aluminum alloy at 150℃ and 250℃. At 350℃, the precipitates in 7N01-T6I4 aluminum alloy is dissolved, while the precipitates in 7N01-T6 aluminum alloy is coarsened. As a result, the dynamic yield stress of 7N01-T6I4 aluminum alloy is lower than that of 7N01-T6 aluminum alloy.
作者单位E-mail
刘文辉 邱群 周凡 陈宇强 湖南科技大学 lwh@hnust.edu.cn 
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