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    魏伟, 魏坤霞, I.V.亚力克山卓夫, 王飞, 刘国心, 张微. 铸态Cu-5.7%Cr合金在等径角挤压中铬纤维的原位形成[J]. 机械工程材料, 2009, 33(1): 5-7.
    引用本文: 魏伟, 魏坤霞, I.V.亚力克山卓夫, 王飞, 刘国心, 张微. 铸态Cu-5.7%Cr合金在等径角挤压中铬纤维的原位形成[J]. 机械工程材料, 2009, 33(1): 5-7.
    shu
    WEI Wei, WEI Kun-xia, I.V.Alexandrov, WANG Fei, LIU Guo-xin, ZHANG Wei. In Situ Formation of Cr Filaments during Equal Channel Angular Pressing of Casting Cu-5.7%Cr Alloy[J]. Materials and Mechanical Engineering, 2009, 33(1): 5-7.
    Citation: WEI Wei, WEI Kun-xia, I.V.Alexandrov, WANG Fei, LIU Guo-xin, ZHANG Wei. In Situ Formation of Cr Filaments during Equal Channel Angular Pressing of Casting Cu-5.7%Cr Alloy[J]. Materials and Mechanical Engineering, 2009, 33(1): 5-7.
    shu

    铸态Cu-5.7%Cr合金在等径角挤压中铬纤维的原位形成

    In Situ Formation of Cr Filaments during Equal Channel Angular Pressing of Casting Cu-5.7%Cr Alloy

      摘要
    • 摘要: 利用等径角挤压(ECAP)技术对铸态Cu-5.7%Cr合金进行了变形,对变形过程中原位铬纤维的形成进行了研究;根据纤维的形成过程,分析了Segal和Mcnelly剪切变形模型的适用性.结果表明:在挤压变形过程中,树枝状的铬相发生了旋转和延伸,从而形成细长的原位纤维,随着变形量的增大,纤维方向趋于与x轴平行;考虑摩擦的影响,提出了用修正的Mcnelly剪切变形模型来计算形变原位纤维的倾斜角,计算值与试验结果吻合较好.

       

      Abstract: The evolution and formation of in situ Cr filaments during equal channel angular pressing(ECAP) of Cu-5.7%Cr alloy were investigated.The applicability of Segal model and Mcnelley model of shear deformation were analyzed based on the evolution of Cr filaments.The results indicate that the rotation and spreading of dendritic Cr phase took place during shear deformation proces,resulting in the formation of long and thin in situ filaments.The direction of in situ filaments tended to be parallel to the x axis at large strains.Taking into account the effect of friction between billets and die walls on the material flow,the Mcnelley model of shear deformation for calculating the inclination angle of in situ filaments was modified.The predicted inclination angle of in situ filaments was in agreement with experimental results.

       

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