Abstract An understanding of rate dependency over a wide range of time scales is vitally important in approximating the transient response of critical components operating in extreme environments. Many examples of viscoplastic model formulations can be found in the literature, wherein all rate dependency is assumed to occur after yielding. Such models neglect any viscous effects during elastic deformation. In the present work, a unified viscoelastic – viscoplastic material model is developed for the Nickel superalloy RR1000. Particular emphasis is placed on model parameter determination, which is accomplished using standard cyclic plasticity and stress relaxation experimental data.

中文翻译：

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用于高温合金应用的粘弹性 - 粘塑性材料模型

摘要 了解大范围时间尺度上的速率依赖性对于近似极端环境中运行的关键组件的瞬态响应至关重要。在文献中可以找到许多粘塑性模型公式的例子，其中假设所有速率相关性都发生在屈服之后。这种模型忽略了弹性变形过程中的任何粘性效应。在目前的工作中，为镍高温合金 RR1000 开发了统一的粘弹性 - 粘塑性材料模型。特别强调模型参数确定，这是使用标准循环塑性和应力松弛实验数据完成的。