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Volume 25 Issue 6
Jun.  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(6): 663-671
Ying Yan, Li-jia Chen, Guo-qiang Zhang, Dong Han,  and Xiao-wu Li, Variation of the uniaxial tensile behavior of ultrafine-grained pure aluminum after cyclic pre-deformation, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 663-671. https://doi.org/10.1007/s12613-018-1613-8
Cite this article as:
Ying Yan, Li-jia Chen, Guo-qiang Zhang, Dong Han,  and Xiao-wu Li, Variation of the uniaxial tensile behavior of ultrafine-grained pure aluminum after cyclic pre-deformation, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 663-671. https://doi.org/10.1007/s12613-018-1613-8
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研究论文

Variation of the uniaxial tensile behavior of ultrafine-grained pure aluminum after cyclic pre-deformation

  • Department of Materials Physics and Chemistry, School of Materials Science and Engineering, and Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, Northeastern University, Shenyang 110819, China

  • School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China

  • 通讯作者:

    Xiao-wu Li    E-mail: xwli@mail.neu.edu.cn

  • To explore the influence of cyclic pre-deformation on the mechanical behavior of ultrafine-grained (UFG) materials with a high stacking fault energy (SFE), UFG Al processed by equal-channel angular pressing (ECAP) was selected as a target material and its tensile behavior at different pre-cyclic levels D (D=Ni/Nf, where Ni and Nf are the applied cycles and fatigue life at a constant stress amplitude of 50 MPa, respectively) along with the corresponding microstructures and deformation features were systematically studied. The cyclic pre-deformation treatment on the ECAPed UFG Al led to a decrease in flow stress, and a stress quasi-plateau stage was observed after yielding for all of the different-state UFG Al samples. The yield strength σYS, ultimate tensile strength σUTS, and uniform strain ε exhibited a strong dependence on D when D ≤ 20%; however, when D was in the range from 20% to 50%, no obvious change in mechanical properties was observed. The micro-mechanism for the effect of cyclic pre-deformation on the tensile properties of the ECAPed UFG Al was revealed and compared with that of ECAPed UFG Cu through the observations of deformation features and microstructures.
    • Research Article

    Variation of the uniaxial tensile behavior of ultrafine-grained pure aluminum after cyclic pre-deformation

    + Author Affiliations
      Abstract
    • To explore the influence of cyclic pre-deformation on the mechanical behavior of ultrafine-grained (UFG) materials with a high stacking fault energy (SFE), UFG Al processed by equal-channel angular pressing (ECAP) was selected as a target material and its tensile behavior at different pre-cyclic levels D (D=Ni/Nf, where Ni and Nf are the applied cycles and fatigue life at a constant stress amplitude of 50 MPa, respectively) along with the corresponding microstructures and deformation features were systematically studied. The cyclic pre-deformation treatment on the ECAPed UFG Al led to a decrease in flow stress, and a stress quasi-plateau stage was observed after yielding for all of the different-state UFG Al samples. The yield strength σYS, ultimate tensile strength σUTS, and uniform strain ε exhibited a strong dependence on D when D ≤ 20%; however, when D was in the range from 20% to 50%, no obvious change in mechanical properties was observed. The micro-mechanism for the effect of cyclic pre-deformation on the tensile properties of the ECAPed UFG Al was revealed and compared with that of ECAPed UFG Cu through the observations of deformation features and microstructures.
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