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應(yīng)變水平對鋯合金動載下塑性變形機制的影響
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表面物理與化學(xué)重點實驗室,表面物理與化學(xué)重點實驗室,中國工程物理研究院材料研究所,中國工程物理研究院材料研究所,中國工程物理研究院材料研究所

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國家自然科學(xué)基金資助(項目號51401187)


Influences of Strain on the Plastic Deformation Mechanism of Zirconium Alloy subjected to dynamic loading
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Science and Technology on Surface Physics and Chemistry Laboratory,Jiangyou,Sichuan,Science and Technology on Surface Physics and Chemistry Laboratory,Jiangyou,Sichuan,Institute of Materials,China Academy of Engineering Physics,Jiangyou,Sichuan,Institute of Materials,China Academy of Engineering Physics,Jiangyou,Sichuan,Institute of Materials,China Academy of Engineering Physics,Jiangyou,Sichuan

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    摘要:

    本文基于試驗設(shè)計研究了應(yīng)變參數(shù)對鋯合金動載下塑性變形機制的影響。通過控制應(yīng)變速率，采用應(yīng)變限位環(huán)的方法實現(xiàn)了鋯合金高應(yīng)變速率下應(yīng)變參數(shù)的單一分離，應(yīng)變速率為2300 s-1時，獲得了四個不同的應(yīng)變水平：0.11、0.21、0.30、0.33。結(jié)果表明：形變帶和轉(zhuǎn)變帶是鋯合金不同應(yīng)變階段塑性變形的重要方式，形變帶內(nèi)部以嚴(yán)重變形的晶粒組成，而轉(zhuǎn)變帶內(nèi)部主要由100～300 nm的細(xì)小等軸晶粒組成。基于鋯合金高應(yīng)變速率不同應(yīng)變下微觀組織表征，預(yù)測了應(yīng)變參數(shù)對鋯合金動載下塑性過程的影響。

    Abstract:

    The influence of strain on the plastic deformation mechanism of zirconium alloy subjected to dynamic loadings was investigated by means of the experimental design in this paper. The strain parameter of zirconium alloy subjected to dynamic loading was only separated by the strain stopping rings and the the controled strain rate, and four strain levels including 0.11, 0.21, 0.30 and 0.33 were obtained at a strain rate of 2300 s-1. The results show that the deformed bands and transformed bands were considered as the dominant plastic deformaton mechanism of zirconium alloy under different strain stages. The deformed bands were mainly composed of the severe deformed grains, and the transformed bands mainly composed of the ultrafine and equiaxed grains with the mean diameter of about 100~300 nm were confirmed. Based on microstructural characterization of zirconium alloy under high strain rate and different strains, the plastic deformation process of zirconium alloy subjected to different strain parameters was speculated.

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郭亞昆,帥茂兵,鄒東利,肖大武,何立峰.應(yīng)變水平對鋯合金動載下塑性變形機制的影響[J].稀有金屬材料與工程,2017,46(6):1584~1589.[Guo Yakun, Shuai Maobing, Zou Dongli, Xiao Dawu, He Lifeng. Influences of Strain on the Plastic Deformation Mechanism of Zirconium Alloy subjected to dynamic loading[J]. Rare Metal Materials and Engineering,2017,46(6):1584~1589.]
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  • 收稿日期:2016-03-24
  • 最后修改日期:2016-08-15
  • 錄用日期:2016-09-18
  • 在線發(fā)布日期: 2017-11-07
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