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arXiv · 2507.05293

Dynamic Plastic Deformation Delocalization in FCC Solid Solution Metals

Dhruv Anjaria·Milan Heczko·Daegun YoU·Mathieu Calvat·Shuchi Sanandiya·Maik Rajkowski·Aditya Srinivasan Tirunilai·Huseyin Sehitoglu·Guillaume Laplanche·J. C. Stinville
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Abstract

Metallic materials undergo irreversible deformation under mechanical loading, leading to intense local plastic localization that reduces their mechanical performance. We identify a new mechanism of plastic deformation localization 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.

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Dhruv Anjaria, Milan Heczko, Daegun YoU, Mathieu Calvat, Shuchi Sanandiya, Maik Rajkowski, Aditya Srinivasan Tirunilai, Huseyin Sehitoglu, Guillaume Laplanche, J. C. Stinville. 2025-07-05. Dynamic Plastic Deformation Delocalization in FCC Solid Solution Metals. https://arxiv.org/abs/2507.05293

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