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Serration Flow Behavior with Abnormal Strain Rate Sensitivity of Fine-Grained Mg-0.8 Wt Pct Ca Alloy

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Serration flow is first observed in a fine-grained Mg-0.8 wt pct Ca alloy throughout the deformation history. Strain rate sensitivity (SRS) is sensitive with the deformation temperatures. A positive SRS in combination with a type of downward serration is found at low temperatures, which is mostly attributed to the strong dislocation–dislocation interaction. However, at high temperatures, another upward serration is observed and the SRS is changed to negative as a result of the solute pinning dislocation.

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This research is supported by NSFC (51101142 and 50821001), New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0690), and Science Support and Science Foundation for the Excellent Youth Scholars and of Hebei Province (13961002D and Y2012019).

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Authors and Affiliations

  1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, P.R. China

    Qiuming Peng (Professor) & Hui Fu (Researcher)

  2. School of Materials Science and Engineering, Beihang University, Beijing, 10083, P.R. China

    Wenlong Xiao (Associate Professor)

Authors
  1. Qiuming Peng
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  2. Hui Fu
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  3. Wenlong Xiao
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Correspondence to Qiuming Peng.

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Manuscript submitted May 1, 2013.

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Peng, Q., Fu, H. & Xiao, W. Serration Flow Behavior with Abnormal Strain Rate Sensitivity of Fine-Grained Mg-0.8 Wt Pct Ca Alloy. Metall Mater Trans A 44, 4469–4474 (2013). https://doi.org/10.1007/s11661-013-1941-2

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  • DOI: https://doi.org/10.1007/s11661-013-1941-2

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