张辉,唐敏桢,蒋福林.Al-Zn-Mg-Cu合金包覆淬火残余应力 与时效工艺研究[J].湖南大学学报:自然科学版,2019,(12):65~70
Al-Zn-Mg-Cu合金包覆淬火残余应力 与时效工艺研究
Studies on Residual Stress and Aging Process of Cladded Quenched Al-Zn-Mg-Cu Alloys
  
DOI:
中文关键词:  铝合金  包覆淬火  残余应力  人工时效  原位电阻率
英文关键词:aluminum alloys  cladded quenching  residual stress  artificial aging  in-situ electrical resistivity
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作者单位
张辉,唐敏桢,蒋福林 (湖南大学 材料科学与工程学院湖南 长沙 410082) 
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中文摘要:
      结合残余应力测量、原位电阻率表征、硬度测试和透射电子显微镜观察等探究了一种新型包覆淬火工艺及后续时效处理对Al-Zn-Mg-Cu合金板材微观组织和力学性能的影响. 结果表明:包覆淬火工艺可以有效降低Al-Zn-Mg-Cu合金的淬火残余应力及位错密度,原位电阻率结果显示包覆层厚度越厚(0.2~0.6 mm),包覆淬火处理合金的时效析出行为与普通淬火合金越接近;通过原位电阻率和硬度测试获得了包覆淬火合金优化的峰值时效制度,在此时效处理条件下,包覆处理合金能够保持与普通水淬样品近似的析出显微组织及力学性能.
英文摘要:
      The influences of a new cladding quenching process and subsequent aging treatment on the microstructure and mechanical properties of Al-Zn-Mg-Cu alloy plates were investigated based on residual stress measurement,in-situ electrical resistivity characterization,Vickers hardness testing and transmission electron microscope(TEM) observation. The results show that the cladding quenching process can effectively reduce the quenching residual stress and dislocation density of Al-Zn-Mg-Cu alloy. The in-situ electrical resistivity results show that,with the increased cladded thickness(0.2~0.6 mm),the aging precipitation behavior of cladded quenched samples is more similar to that of the uncladded quenched sample. The optimized artificial peak aging processes for the cladded quenched alloys were obtained on the basis of in-situ electrical resistivity and hardness testing results. Under such optimized artificial aging conditions,the cladded quenched samples can maintain the similar nano-precipitate characteristics and mechanical properties to that of uncladded quenched sample.
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