一个基于Ni的超合金的基于微结构的统一构成模型及其在磁盘造过程中的应用
Ning-Fu Zeng1,2, Yong-Cheng Lin1,2,3, Shu-Xin Li4
1School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|June 13, 2025
概括
这项研究引入了基于Ni的超合金的统一构成模型,准确地预测了热变形期间的微观结构演变. 该模型增强了造过程模拟和优化,具有高预测精度.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算建模 计算建模
背景情况:
- 基于Ni的超合金的热变形对于性能至关重要,但模型复杂.
- 现有的模型往往难以将微观结构进化与宏观行为相结合.
研究的目的:
- 开发一种新的基于Ni的超级合金的统一构成模型.
- 在热变形过程中系统地将微观结构演变与宏观应力应变反应结合起来.
- 为了增强模拟和优化造过程.
主要方法:
- 纳入微观结构变量 (损伤,再结晶, δ 阶段,粒径,位移密度).
- 包括宏观应力状态参数 (主要应力,液态应力,米塞斯应力).
- 通过自定义子程序与有限元法 (FEM) 的集成.
主要成果:
- 风湿曲线的模型预测误差小于3%.
- 对于再结晶分数和平均颗粒大小的相对误差低于8%.
- 在关键的磁盘造区域中表现出异常的预测准确性.
结论:
- 统一的构成模型准确地捕捉了微观结构的演变和应力-应变行为.
- 与FEM集成的框架可靠地模拟和优化造过程.
- 该模型为了解和控制超级合金中的高温变形提供了一个强大的工具.
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