• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 21 Issue 4
Aug.  2008
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Article Contents
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.

Plastic Deformation Mechanism of Nanocrystalline Nickel

  • Received Date: 05 May 2007
  • Publish Date: 25 Aug 2008
  • Nanocrystalline nickel was cold-rolled with different strains to further research the mechanical properties of nano-metals,especially the mechanism of plastic deformation.The microstructure and deformation mechanism of nanocrystalline nickel were investigated by the transmission electron microscope(TEM) and the X-ray diffraction(XRD) analysis.In addition,the lattice constant of nanocrystalline nickel with different strains was calculated.The research results show that the grain size increases from 16.6 to 28.7 nm with the increase of deformation due to the growth of grains in some regions or directions.When the strain is less than 30%,the deformation is dominated by dislocation activity and grain rotation.When the strain exceeds 30%,partial dislocation generated by GBs(grain boundaries) leads to twinning,and the partial dislocation and the twinning harmonize during the deformation.The average lattice constant of nanocrystalline nickel is 0.353 3 nm greater than that of coarse grain nickel.

     

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