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Dynamic plastic deformation delocalization in FCC solid solution metals
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DOI：10.1038/s41467-026-69046-3.png)
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En 中文
Metallic materials undergo irreversible deformation under mechanical loading, leading to intense local plastic localization that reduces their mechanical performance. We identify a mechanism of plastic deformation that dynamically promotes the homogenization of plasticity in face-centered cubic solid solution-strengthened metallic alloys. We observe that this mechanism occurs within a narrow range of stacking fault energies and involves competing deformation between nanoscale twinning and slip. This phenomenon is attributed to a new mechanism referred to as dynamic plastic deformation delocalization, which opens a new design space for enhancing the mechanical performance of metallic materials. We demonstrate that the activation of this mechanism has a significant impact on fatigue properties, greatly enhancing fatigue strength when it occurs. This work identifies a mechanism, termed dynamic plastic delocalization, that homogenizes deformation in FCC alloys, breaking the usual trade-off between monotonic strength and cyclic fatigue strength and enabling improved fatigue performance without loss of strength.
Keyword:
Mechanical properties
Metals and alloys
Science
Humanities and Social Sciences
multidisciplinary
期刊
IF:
15.7
论文数:
9.4W
被引数:
91.2W
机构
引用论文
The formation and destruction of stacking fault tetrahedron in fcc metals: A molecular dynamics study.png)
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