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預(yù)回復(fù)對(duì)Al-11.5Zn-3.5Mg-2.3Cu-0.24Zr擠壓材固溶-T652組織與性能的影響
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江蘇大學(xué)機(jī)械工程學(xué)院

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TG174.4

基金項(xiàng)目:

江蘇省工業(yè)科技支撐計(jì)劃項(xiàng)目（BE2008118）；江蘇大學(xué)優(yōu)秀青年學(xué)術(shù)骨干培育專項(xiàng)基金（1211110001）資助；江蘇省高校研究生科研創(chuàng)新計(jì)劃項(xiàng)目(CXLX110563)；江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程項(xiàng)目


Effect of pre-recovery on microstructure and properties of Al-11.5Zn-3.5Mg-2.3Cu-0.24Zr-0.0025Sr aluminum alloy extrusion sub
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School of Mechanical Engineering,Jiangsu University

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    摘要:

    采用硬度與電導(dǎo)率測(cè)試、拉伸試驗(yàn)、晶間腐蝕和剝落腐蝕試驗(yàn)、XRD、掃描電鏡（SEM）、電子背散射衍射檢驗(yàn)(EBSD)等方法，研究了預(yù)回復(fù)退火對(duì)Al-11.5Zn-3.5Mg-2.3Cu-0.24Zr鋁合金擠壓材固溶-T652處理組織與性能的影響。結(jié)果表明：與未經(jīng)預(yù)回復(fù)退火相比，預(yù)回復(fù)退火可有效抑制合金的再結(jié)晶，細(xì)化晶粒尺寸，降低平均晶界角度，顯著提高低角度晶界百分比；預(yù)回復(fù)退火能夠保持同等抗拉強(qiáng)度的情況下，提高該合金的屈服強(qiáng)度和抗腐蝕性能；位錯(cuò)強(qiáng)化和低角度晶界強(qiáng)化是合金的屈服強(qiáng)度提高的主要因素。

    Abstract:

    Effect of pre-recovery solid solution-T652 treatment and solid solution-T652 treatment on microstructure and properties of Al-11.5Zn-3.5Mg-2.3Cu-0.24Zr-0.0025Sr aluminum alloy extrusion were studied by means of micro-hardness tester and electrical conductivity test, tensile test, intergranular and exfoliation corrosion experiment, scanning electron microscope (SEM) and electron back-scattered diffraction (EBSD). The results show that pre-recovery-annealing treatment can restrain recrystallization effectively, refine the grain size, and reduce the average angle of grain boundaries, increase the percentage of low angle grain boundaries significantly. Pre-annealing can improve the yield strength and the corrosion resistance performance, and maintain the same tensile strength. The increase of the yield strength is attributed to dislocation strengthening and low angel grain boundaries strengthening.

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許曉靜.預(yù)回復(fù)對(duì)Al-11.5Zn-3.5Mg-2.3Cu-0.24Zr擠壓材固溶-T652組織與性能的影響[J].稀有金屬材料與工程,2017,46(3):796~801.[xuxiaojing. Effect of pre-recovery on microstructure and properties of Al-11.5Zn-3.5Mg-2.3Cu-0.24Zr-0.0025Sr aluminum alloy extrusion sub[J]. Rare Metal Materials and Engineering,2017,46(3):796~801.]
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  • 收稿日期:2014-12-06
  • 最后修改日期:2015-02-05
  • 錄用日期:2015-03-25
  • 在線發(fā)布日期: 2017-05-18
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