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Microstructure evolution of different initial deformation energy storage ultra high strength aluminum alloy by different heating rate
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Jiangsu University,Jiangsu University

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TG146.2+1

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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.

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[xuxiaojing, 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.]
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History
  • Received:May 24,2016
  • Revised:June 29,2016
  • Adopted:September 14,2016
  • Online: September 06,2018
  • Published: