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纳米金属Ni的塑性变形机制

贾冲 张喜燕

贾冲, 张喜燕. 纳米金属Ni的塑性变形机制[J]. 西南交通大学学报, 2008, 21(4): 544-548.
引用本文: 贾冲, 张喜燕. 纳米金属Ni的塑性变形机制[J]. 西南交通大学学报, 2008, 21(4): 544-548.
JIA Chong, ZHANG Xiyan. Plastic Deformation Mechanism of Nanocrystalline Nickel[J]. Journal of Southwest Jiaotong University, 2008, 21(4): 544-548.
Citation: JIA Chong, ZHANG Xiyan. Plastic Deformation Mechanism of Nanocrystalline Nickel[J]. Journal of Southwest Jiaotong University, 2008, 21(4): 544-548.

纳米金属Ni的塑性变形机制

基金项目: 

国家自然科学基金(50461001)

广西自然科学基金技术,攻关项目(0575-18,0639003)

详细信息
    作者简介:

    贾冲(1980- ),男,博士研究生,研究方向为事纳米金属材料研究,电话:13880415742,E-mail:kehen888@163.com

Plastic Deformation Mechanism of Nanocrystalline Nickel

  • 摘要: 为了深入探讨纳米金属的力学性能特别是塑性变形机制,对纳米金属Ni进行了不同程度的冷轧变形.通过X射线衍射分析和透射电镜观察对纳米金属Ni的微观结构和变形机制进行了研究,并对不同变形量下的晶格常数进行了计算.研究表明,随变形量增大,纳米晶体的晶粒尺寸逐渐增大,从最初的16.6 nm增大到28.7 nm,这种增长是由于部分方向(区域)晶粒长大的结果;变形量较小(小于30%)时,位错的活动与晶粒旋转是的变形主要方式,变形量较大(超过30%)时,晶界发射不全位错与孪晶的交互作用协调变形;纳米Ni的平均晶格常数为0.353 3 nm,略高于粗晶Ni的晶格常数.

     

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出版历程
  • 收稿日期:  2007-05-05
  • 刊出日期:  2008-08-25

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