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Al-(Zr)-(Pr)-(Cr)合金析出和再結(jié)晶行為研究
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粉末冶金研究院

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中圖分類號(hào):

TG146.4

基金項(xiàng)目:

國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃（973計(jì)劃）;中國(guó)博士后科學(xué)基金


A study of precipitation and recrystallization in Al-(Zr)-(Pr)-(Cr) alloys
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Affiliation:

State Key Laboratory of Powder Metallurgy, Central South University

Fund Project:

National Natural Science Foundation of China (50905143，51175424); Graduate Starting Seed Fund of Northwestern Polytechnical University (Z2012064)

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    摘要:

    采用透射電鏡和高分辨透射電鏡研究了Al-Zr-Pr-Cr合金中析出彌散相的結(jié)構(gòu)和穩(wěn)定性。采用硬度和金相觀察對(duì)比了彌散相在500℃的析出硬化作用及其穩(wěn)定性，以及對(duì)合金再結(jié)晶的抑制作用。研究結(jié)果表明：由于熱處理析出了大量共格的、L12結(jié)構(gòu)的15~20nm含Pr的 (Al, Cr)3Zr彌散相，因此Al-0.16Zr-0.26Pr-0.18Cr合金具有顯著地析出硬化效果、熱穩(wěn)定性和抑制再結(jié)晶效果。其高溫析出硬化及抑制鋁基體再結(jié)晶作用優(yōu)于Al3Zr和含Pr的Al3Zr彌散相。

    Abstract:

    Structure and thermal stability of nano-sized dispersoids in Al-(Zr)-(Pr)-(Cr) alloys have been revealed by conventional and high-resolution transmission electron microscopy. Al-0.16Zr-0.26Pr-0.18Cr alloy (wt.%) illustrates significant precipitation strengthening, thermal stability and inhibit-recrystallization ability by forming a relatively high density of coherent and well-dispersed Pr-containing (Al, Cr)3Zr dispersoids (15 - 20 nm) with L12 structure. The dispersoid is coherent even exposed at 500℃ for 400 h. Pr-containing (Al, Cr)3Zr dispersoid is finer and coarsening-resistant around 500 癈, as compared with L12-structured Al3Zr and Pr-containing Al3Zr dispersoid.

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方華嬋. Al-(Zr)-(Pr)-(Cr)合金析出和再結(jié)晶行為研究[J].稀有金屬材料與工程,2016,45(3):599~605.[fang hua chan. A study of precipitation and recrystallization in Al-(Zr)-(Pr)-(Cr) alloys[J]. Rare Metal Materials and Engineering,2016,45(3):599~605.]
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  • 收稿日期:2014-01-30
  • 最后修改日期:2014-07-09
  • 錄用日期:2014-08-12
  • 在線發(fā)布日期: 2016-07-06
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