Effects of free surface and heterogeneous residual internal stress on stress-driven grain growth in nanocrystalline metals

@inproceedings{Wang2013EffectsOF,
  title={Effects of free surface and heterogeneous residual internal stress on stress-driven grain growth in nanocrystalline metals},
  author={Fei Wang and Jianfei Zhao and Peng Huang and Anouk S. Schneider and Tian Jian Lu and Ke-wei Xu},
  year={2013}
}
By reevaluating the experimental study of Zhang et al. (2005), here we demonstrate that the extent of grain growth, previously proposed to be solely driven by external stress, may have been significantly overestimated. A new physical mechanism, termed as free surface assisted stress-driven grain growth (or self-mechanical annealing), is proposed and discussed in detail. Representing the cooperative effect of free surface and heterogeneous residual internal stress, the proposed mechanism is… CONTINUE READING

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