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首页> 外文会议>International Symposium on Superalloys >Microstructure modeling of the dynamic recrystallization kinetics during turbine discforging of the nickel based superalloy Allvac 718PlusTM
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Microstructure modeling of the dynamic recrystallization kinetics during turbine discforging of the nickel based superalloy Allvac 718PlusTM

机译：镍基高温合金Allvac 718PlusTM的涡轮机锻造过程中动态再结晶动力学的微观结构建模

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摘要

The outstanding mechanical properties of the nickel basedsuperalloy Allvac 718PlusTM are sensitive to the microstructure,in particular to the grain size, which dependson the processing history. The grain structure ismainly controlled by thermo-mechanical processes like recrystallizationand grain growth. This paper deals withthe simulation of the evolution of the grain structure in alloyAllvac 718PlusTM during disc forging using the FiniteElement (FE) code Deform 2DTM. Additionally the materialflow, pressing forces and temperatures are of interest.The hot deformation behaviour of Allvac 718PlusTMhas been characterized in a temperature range of 900-1050°C and at strain rates of 0.1–10 s-1 by use of cylindricalcompression tests. Particular emphasis is put onthe identification of the parameters of a semi-empiricalmodel for dynamic recrystallization. Furthermore thesimulated results are compared with an industrial trialforging.The results of the simulations shall be the basisfor the development of an optimized forging process withrespect to cost effectiveness, product quality and low energyconsumption.
机译：镍基杰出的机械性能 高温合金Allvac 718PlusTM对微观结构敏感， 尤其是晶粒尺寸，这取决于 关于处理历史。晶粒结构是 主要受重结晶等热机械过程控制 和谷物生长。本文涉及 合金中晶粒结构演变的模拟 使用有限度进行圆盘锻造时的Allvac 718PlusTM 元素（FE）代码变形2DTM。另外材料 流量，压力和温度都很重要。 Allvac 718PlusTM的热变形行为 的特征是在900- 1050°C，以0.1–10 s-1的应变速率使用圆柱体 压缩测试。特别强调 半经验参数的识别 动态重结晶模型。此外 模拟结果与工业试锻进行了比较。 仿真结果应作为基础 用于开发优化的锻造工艺 在成本效益，产品质量和低能耗方面 消耗。

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