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Chinese Journal of High Pressure Physics  > 2009  >  23(3): 196-202 .
QIN Kun, YANG Li-Ming, HU Shi-Sheng. Study on Strain Rate Sensitivities of FCC Metals Based on Multi-Scale Analysis[J]. Chinese Journal of High Pressure Physics, 2009, 23(3): 196-202 . doi: 10.11858/gywlxb.2009.03.006
Citation: QIN Kun, YANG Li-Ming, HU Shi-Sheng. Study on Strain Rate Sensitivities of FCC Metals Based on Multi-Scale Analysis[J]. Chinese Journal of High Pressure Physics, 2009, 23(3): 196-202 . doi: 10.11858/gywlxb.2009.03.006
shu

Study on Strain Rate Sensitivities of FCC Metals Based on Multi-Scale Analysis

doi: 10.11858/gywlxb.2009.03.006
  • 1.

    CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China;

  • 2.

    Mechanics and Materials Science Research Centre, Faculty of Engineering Ningbo University, Ningbo 315211, China

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  • Corresponding author: QIN Kun
  • Received Date: 12 May 2008
  • Rev Recd Date: 13 Oct 2008
  • Publish Date: 15 Jun 2009
    Abstract
  • Dislocation theory and molecular dynamics simulation were used to investigate the effect of atom properties on the strain-rate sensitivity of FCC metals. A method to analyze such effect is proposed. The stress dependence on dislocation velocity is identified as the key of such study and is obtained via 2-D MD simulations on the motion of an individual dislocation in FCC metals. Combining the simulation results with Orowan's relationship, it is concluded that strain rate sensitivities of FCC metals are mainly dependent on their atomic mass rather than the interatomic potential. The order of strain rate sensitivities of five FCC metals obtained by multi-scale analysis is consistent with the experimental results available.

     

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    • References(14)
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