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超低溫軋制制備孿晶Cu-Zn-Si合金的退火行為研究
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中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院

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TG146.1

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國家自然科學(xué)基金項目


Annealing behaviors of Cu-Zn-Si alloy with nanotwins prepared by cryorolling
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yangxuyue@mail.csu.edu.cn,College of Materials Science and Engineering, Centre South University,College of Materials Science and Engineering, Centre South University

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    摘要:

    利用超低溫(液氮浸泡)下多道次軋制制備納米孿晶Cu-Zn-Si合金，分析軋制溫度對Cu-Zn-Si合金力學(xué)性能和退火行為的影響。結(jié)果表明：合金在超低溫軋制過程中形成大量厚度約為10 nm的超細孿晶，促進其硬度和強度提高；對超低溫軋制的合金退火，更易于誘發(fā)再結(jié)晶、提高再結(jié)晶形核率；利用超低溫軋制產(chǎn)生的納米孿晶界和退火形成的亞微米晶粒，能使合金兼具優(yōu)異的強度和塑性；經(jīng)90%超低溫軋制和280 ℃? h退火處理后，合金的抗拉強度達787 MPa，延伸率為14.3%。

    Abstract:

    The microstructure, mechanical properties and annealing behaviors of Cu-Zn-Si alloy subjected to cryorolling was investigated by transmission electron microscope, tensile tests and microhardness measurement. It was found that cryorolling encouraged twinning and dislocation accumulation in Cu-Zn-Si alloy, leading to the distinct enhancement of tensile strength and microhardness. Furthermore, cryorolling could provide more nucleation sites for static recrystallization than cold rolling does. After annealing, cryorolled samples owned more excellent combination of strength and ductility than cold rolled ones, owing to the nanotwins generated by cryorolling and finer grains. A tensile strength of 787 MPa and an elongation to failure of 14.3% were obtained for Cu-Zn-Si alloy after cryorolling followed by annealing at 280 ℃ for 5 hours.

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秦佳,楊續(xù)躍,葉友雄.超低溫軋制制備孿晶Cu-Zn-Si合金的退火行為研究[J].稀有金屬材料與工程,2016,45(5):1340~1344.[qinjia, Yang Xuyue, Ye Youxiong. Annealing behaviors of Cu-Zn-Si alloy with nanotwins prepared by cryorolling[J]. Rare Metal Materials and Engineering,2016,45(5):1340~1344.]
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  • 收稿日期:2014-05-14
  • 最后修改日期:2014-06-29
  • 錄用日期:2014-07-28
  • 在線發(fā)布日期: 2016-06-02
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