Atomic scale insights into super-nano dual-phase amorphous-nanocrystalline iron with synergistic high strength-plasticity

DOI码：10.1016/j.intermet.2025.108902

发表刊物：Intermetallics

关键字：Super-nano dual-phase Molecular dynamics Amorphous-nanocrystalline iron Mechanical properties Plastic deformation

摘要：To reveal the mechanical properties and plastic deformation mechanisms of super-nano dual-phase iron at the atomic scale, molecular dynamics models of amorphous iron (amorphous-Fe), nanocrystalline iron (NC-Fe), super-nano dual-phase amorphous-nanocrystalline iron (SNDP-A/NC-Fe), and super-nano dual-phase nanocrystalline-amorphous iron (SNDP-NC/A-Fe) were established. The results indicate super-nano dual-phase nanostructures have exhibit good strength-plasticity balance. The plasticity of SNDP-A/NC-Fe model exceeds that of amorphous-Fe with higher strength. The strength of SNDP-NC/A-Fe model is higher than that of the NC Fe model with excellent plasticity. The relatively uniform stress distribution leads to the good plasticity of SNDP-A/NC-Fe models owing to the suppression of nanocrystalline on shear band propagation. Additionally, the bodycentered cubic (BCC) → face-centered tetragonal (FCT) phase transition lead to the reduction of strength, while the twinning behavior leads to a reduction in plasticity owing to the propagation of mature shear bands. This study has revealed the mechanical properties and plastic deformation mechanisms of body-centered cubic super-nano dual-phase structural materials at the atomic scale, providing a theoretical foundation for the design and application of low-activation steels with high strength and toughness.

合写作者：Long Luo,Liang Shen,Hao Liu,Jun Ding

第一作者：Lusheng Wang

论文类型：期刊论文

通讯作者：Yu Tian*,Siliang Yan*

论文编号：108902

学科门类：工学

文献类型：J

卷号：185

期号：-

是否译文：否

发表时间：2025-06-29

收录刊物：SCI、EI

附件：

Atomic scale insights into super-nano dual-phase amorphous-nanocrystalline iron with synergistic high strength-plasticity.pdf