Experiments and simulations show that when an initially defect-free rigid crystal is subjected to deformation at a constant rate, irreversible plastic flow commences at the so-called yield point. The yield point is a weak function of the deformation rate, which is usually expressed as a power law with an extremely small nonuniversal exponent. We reanalyze a representative set of published data on nanometer sized, mostly defect-free Cu, Ni, and Au crystals in light of a recently proposed theory of yielding based on nucleation of stable stress-free regions inside the metastable rigid solid. The single relation derived here, which is not a power law, explains data covering 15 orders of magnitude in timescales.

中文翻译：

---

几乎无缺陷的晶体屈服的成核理论：了解速率相关的屈服点。

实验和模拟表明，当最初无缺陷的刚性晶体以恒定的速率变形时，不可逆的塑性流动始于所谓的屈服点。屈服点是形变率的弱函数，通常用幂律来表示，其幂指数极小。根据最近提出的基于亚稳刚性固体内部稳定无应力区域成核的屈服理论，我们重新分析了一组具有代表性的已发表数据，涉及纳米级，大多为无缺陷的Cu，Ni和Au晶体。这里导出的唯一关系不是幂定律，它解释了涵盖时标的15个数量级的数据。