Abstract Ablation dynamics focusing exclusively on the thermal field without also considering electron emission and thermal stress is incomplete. The thermo-elasto-plastodynamic model developed in Part I of the paper is applied to estimate non-thermal ablation and the onset of fracture in a polycrystalline gold material in response to ultrafast irradiation of low fluence. Non-thermal ablation in the polycrystalline gold material is a complex dynamical process involving incident fluence, material thermophysical properties, and grain size as the primary parameters. Lattice temperatures are found to be persistently lower than the melting temperature of the target material, thus implying material removal, i.e., ablation, by ways of phase transition and phase explosion is physically improbable. The mechanism that underlies thermally induced damage modes such as yielding, layer disintegration, fragmentation, fracture, and ejection is investigated by exploring the induced thermal stress, elastic-plastic deformation, and strain energy density rate. The concept of power density is applied to estimate ablation depth and the time instance at which yielding and subsequent non-thermal ablation are initiated.

中文翻译：

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多晶金属中超快光学烧蚀的热弹塑性动力学。第二部分：响应和损坏评估

摘要 只关注热场而不考虑电子发射和热应力的烧蚀动力学是不完整的。本文第一部分中开发的热弹塑性动力学模型用于估计多晶金材料响应于低通量超快辐射的非热烧蚀和断裂的发生。多晶金材料的非热烧蚀是一个复杂的动力学过程，涉及入射通量、材料热物理特性和晶粒尺寸作为主要参数。发现晶格温度持续低于目标材料的熔化温度，因此暗示材料去除，即通过相变和相爆炸的方式烧蚀在物理上是不可能的。通过探索诱导热应力、弹塑性变形和应变能密度率，研究了热诱导损伤模式（如屈服、层解体、破碎、断裂和弹出）的机制。功率密度的概念用于估计烧蚀深度以及屈服和随后的非热烧蚀开始的时间实例。