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Al-Zn-Mg合金超低溫高速大變形中超細(xì)晶組織演化行為的研究
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TG146.21

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Microstructural Evolution of Ultrafine-Grained Al-Zn-Mg Alloy during High Speed and Large Plastic Deformation at Cryogenic Temperature
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    摘要:

    利用透射電子顯微鏡研究了Al—Zn-Mg鋁合金在低溫(液氮)高速多向大變形條件下的顯微組織演化,分析了合金在不同變形條件下的變形及組織形貌特征,討論了低溫及幾何動態(tài)再結(jié)晶對顯微組織演化過程的影響。結(jié)果表明:在超低溫、高速、大形變量、約束變形條件下,7075鋁合金能夠不經(jīng)過退火實(shí)現(xiàn)連續(xù)的大變形而不會失效,并且獲得了均勻的超細(xì)晶組織,晶粒尺寸小于200nm;超細(xì)晶組織隨著變形量增加而明顯細(xì)化,相鄰晶粒的取向差增大。

    Abstract:

    Under constrained condition, severe plastic deformation at high speed can be carried out at extreme low temperature without annealing. Homogeneously Ultrafine-Grained (UFG) 7075 aluminum alloy (e.g. Al-Zn-Mg alloy) with size about 200 nm was fabricated. Evolution of microstructure was studied by transmission electron microcopy (TEM). Different deformations were observed. Factors such as low temperature and dynamic recrystallization contributing to microstructural evolution were discussed.

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盧劍 殷京甌 何瑜 丁寶峰. Al-Zn-Mg合金超低溫高速大變形中超細(xì)晶組織演化行為的研究[J].稀有金屬材料與工程,2005,34(5):742~745.[Lu Jian, Yin Jingou, He Yu, Ding Baofeng. Microstructural Evolution of Ultrafine-Grained Al-Zn-Mg Alloy during High Speed and Large Plastic Deformation at Cryogenic Temperature[J]. Rare Metal Materials and Engineering,2005,34(5):742~745.]
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  • 最后修改日期:2003-10-08
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