A Review of Constitutive Models and Thermal Properties for Nickel-based Superalloys Across Machining-Specific Regimes
A Review of Constitutive Models and Thermal Properties for Nickel-based Superalloys Across Machining-Specific Regimes
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特定加工状态下镍基高温合金本构模型和热性能的综述
DOI：
10.1115/1.4056749
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Schoop, Julius
中科院分区：
文献类型：
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作者：
Thornton, E-Lexus;Zannoun, Hamzah;Vomero, Connor;Caudill, Daniel;Schoop, Julius
镍基高温合金因其在高温下的屈服强度、延展性和抗蠕变性能等优异的材料性能而被广泛应用于飞行关键航空发动机部件中。然而，这些理想的高温特性也使得镍合金很难加工。本文提供了各种本构模型的概述和基准，为过程建模界提供了各种校准材料模型之间的客观比较，以提高镍合金加工过程模型预测的准确性。讨论了涉及Johnson-Cook模型及其在有限元模拟中的常数校准的各种研究。研究发现，研究人员对本构模型的标定方法存在显著差异。为此，讨论了各种“基于物理的”模型，作为广泛使用的“现象学”模型（如Johnson-Cook模型）的替代方案，并讨论了更精确的本构模型校准逆方法。本文还提供了一个全面的概述谱系的物理材料性能的一系列镍合金-热性能的变化和热诱导应力的加工温度制度，模拟了各种镍合金。本文还探讨了一系列相关镍合金的化学成分及其应用。总的来说，本文确定了对难加工镍合金进行更全面的分析和工艺特定（例如，原位）热机械性能表征的需求，以提高加工性能和航空发动机部件质量。
Nickel-based superalloys (Ni-alloys) are widely used in flight critical aeroengine components because of their excellent material properties at high temperatures such as yield strength, ductility, and creep resistance. However, these desirable high-temperature properties also make Ni-alloys very difficult to machine. This paper provides an overview and benchmarking of various constitutive models to provide the process modeling community with an objective comparison between various calibrated material models to increase the accuracy of process model predictions for machining of Ni-alloys. Various studies involving the Johnson–Cook model and the calibration of its constants in finite element simulations are discussed. It was found that significant discrepancies exist between researchers’ approaches to calibrating constitutive models. To this end, various “physics-based” models are discussed as an alternative to widely used “phenomenological” models like the Johnson–Cook model, supplemented by a discussion on the more precise inverse method for constitutive model calibration. This paper also provides a comprehensive overview of pedigreed physical material properties for a range of Ni-alloys—the variation of thermal properties and thermally induced stresses over machining temperature regimes are modeled for a variety of Ni-alloys. The chemical compositions and applications for a range of relevant Ni-alloys are also explored. Overall, this paper identifies the need for more comprehensive analysis and process-specific (e.g., in-situ) characterization of thermomechanical properties for difficult-to-machine Ni-alloys to improve machining performance and aeroengine component quality.