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不同形變儲能超高強鋁合金在快速慢速升溫過程中的微結(jié)構(gòu)演變
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江蘇大學(xué),江蘇大學(xué)

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TG146.2+1

基金項目:

江蘇省工業(yè)科技支撐計劃項目（BE2008118）；江蘇大學(xué)優(yōu)秀青年學(xué)術(shù)骨干培育專項基金（1211110001）；江蘇省高校研究生科研創(chuàng)新計劃項目(KYXX_0031，SJLX_0460)；江蘇高校優(yōu)勢學(xué)科建設(shè)工程項目


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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    摘要:

    采用電導(dǎo)率、硬度測試、X射線衍射儀顯微分析(XRD)、電子背散射衍射檢驗(EBSD)，研究了不同初始形變儲能微合金化超高強鋁合金Al-11.54Zn-3.51Mg-2.26Cu-0.24Zr在快速、慢速升溫過程中的微結(jié)構(gòu)演變。結(jié)果表明：升溫過程中合金電導(dǎo)率先增大后減小，硬度先減小后增大。合金位錯在退火溫度達到300 ℃至450 ℃時降低為0，溫度達到470 ℃時，重新產(chǎn)生了位錯。合金在升溫退火至300 ℃晶粒平均尺寸略有降低，退火至470 ℃的合金晶粒尺寸顯著增大。初始形變儲能的提高能夠降低晶粒平均尺寸、低角度晶界比例，提高位錯與晶界強化。

    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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許曉靜,趙建吉.不同形變儲能超高強鋁合金在快速慢速升溫過程中的微結(jié)構(gòu)演變[J].稀有金屬材料與工程,2018,47(6):1793~1799.[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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  • 收稿日期:2016-05-24
  • 最后修改日期:2016-06-29
  • 錄用日期:2016-09-14
  • 在線發(fā)布日期: 2018-09-06
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