In this study, the possible relationships between strength and plasticity are explored on the basis of the stability and mobility of dislocations. An independent dislocation space (IDS) model is proposed by molecular simulation of pilling-up and annihilation behaviors of screw dislocations in face-centered cubic (fcc) metals. It is revealed that there is an intrinsic driving mechanism for the restrictive strength–plasticity relation, and then the criterion for the synchronous improvement of strength and plasticity (SISP) in dislocation mechanism dominated fcc metals is proposed in terms of the IDS model. Finally, the IDS model has been verified in various practical cases and could help design high-performance metallic materials in future.

中文翻译：

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用于同步提高 fcc 金属强度和塑性的独立位错空间模型


在本研究中，基于位错的稳定性和流动性探讨了强度和塑性之间的可能关系。通过对面心立方 （fcc） 金属中螺钉位错的起球和湮灭行为进行分子模拟，提出了一种独立位错空间 （IDS） 模型。揭示了限制强度-塑性关系存在内在驱动机制，然后根据 IDS 模型提出了位错机构主导的 fcc 金属强度和塑性同步提高 （SISP） 的准则。最后，IDS 模型已在各种实际案例中得到验证，有助于未来设计高性能金属材料。