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许晓静,赵建吉.不同形变储能超高强铝合金在快速慢速升温过程中的微结构演变[J].稀有金属材料与工程(英文),2018,47(6):1793~1799.[xuxiaojing and zhaojianji.Microstructure evolution of different initial deformation energy storage ultra high strength aluminum alloy by different heating rate[J].Rare Metal Materials and Engineering,2018,47(6):1793~1799.]
Microstructure evolution of different initial deformation energy storage ultra high strength aluminum alloy by different heating rate
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Received:May 24, 2016  Revised:June 29, 2016
DOI:
Key words: High strength aluminum alloy, annealing heating rate, microstructure
Foundation item:江苏省工业科技支撑计划项目(BE2008118);江苏大学优秀青年学术骨干培育专项基金(1211110001);江苏省高校研究生科研创新计划项目(KYXX_0031,SJLX_0460);江苏高校优势学科建设工程项目
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xuxiaojing and zhaojianji  
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Abstract:
      The effects of different initial energy storage on the properties of Al-11.54Zn-3.51Mg-2.26Cu-0.24Zr super high strength aluminum alloy at different heating rates were explored by electrical conductivity,hardness EBSD and XRD analysis. The results show that the conductivity increases and then decreases with the increase of temperature, the hardness decreases and then increases with the increase of temperature.The dislocation density of the alloy is reduced to 0 when the annealing temperature is between 300 ℃ and 450 ℃, and the dislocation is re produced when the annealing temperature reaches 470 ℃. The average size of alloy decreases slightly during heating annealing to 300 ℃ grain, grain size of the alloy annealed to 470 ℃ increased significantly. Improving the initial deformation energy storage, the average grain size and low angle grain boundaries has been significantly reduced, dislocation and grain boundary strengthening has improved.