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| Inconel 718镍基高温合金热加工动态再结晶建模与计算 |
| Dynamic Recrystallization Modeling and Simulation of Inconel 718 Nickel-based Superalloy |
| Received:August 31, 2020 |
| DOI：10.3969/j.issn.1674-6457.2021.01.007 |
| 中文关键词: Inconel 718 动态再结晶 三维元胞自动机建模 |
| 英文关键词: Inconel 718 dynamic recrystallization (DRX) 3D cellular automaton (3D-CA) model |
| 基金项目:国家自然科学基金(51705316) |
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| 中文摘要: |
| 目的 建立Inconel 718镍基合金动态再结晶组织演变三维介观尺度计算模型。方法 采用Gleeble-1500型热力模拟试验机进行恒温恒应变速率压缩实验，获得Inconel 718高温合金热变形的真应力-应变曲线，并结合光学显微镜分析热变形后的材料的塑性流动规律与组织演化特征，获得材料参数。结果 基于流变和组织行为的分析，建立了考虑动态再结晶特征的组织演变三维元胞自动机模型。结论 该模型可以较准确地描述材料的热变形行为，追踪热变形过程再结晶晶粒的演变，为实际零件的锻造工艺制定提供宏微观计算依据。 |
| 英文摘要: |
| The work aims to study the 3D mesoscale calculation model for dynamic recrystallization microstructure evolution of Inconel 718 nickel-based alloy. Gleeble-1500 thermal/mechanical simulator was adopted to conduct compressive test at constant temperature and strain rate to obtain the true stress-strain curve for thermal deformation of Inconel 718 superalloy. The intrinsic flow characteristics and microstructure evolution behavior of the material after thermal deformation were analyzed in combination with an optical microscope to obtain material parameters. Based on analysis of flowing deformation and organizational behavior, a three-dimensional cellular automaton (3D-CA) model for microstructure evolution of dynamic recrystallization was established. It can accurately describe the hot deformation behavior of the material, track the evolution of recrystallized grains during hot deformation, and provide macro and micro calculation basis for forging process of actual parts. |
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