一个基于泰勒序列和部分导数的新构成模型,用于预测基于的超级合金的高温流动行为
Heping Deng1, Xiaolong Wang1, Jingyun Yang2
1Chongqing Key Laboratory of Advanced Mold Intelligent Manufacturing, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
Materials (Basel, Switzerland)
|July 27, 2024
概括
一个新的构成模型准确地预测了基于的超级合金的高温行为,超过了传统模型. 这一进步有助于优化航空航天制造工艺和材料科学研究.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 航空航天工程 航空航天工程
背景情况:
- 基于的超级合金由于其高温强度,对航空航天至关重要.
- 传统的构成模型难以准确预测超合金在高温下的行为.
- 精确的建模对于优化制造流程和确保组件可靠性至关重要.
研究的目的:
- 开发和验证一种新的构成模型,用于预测基于的超级合金的高温流动行为.
- 将新模型的预测精度与已建立的Arrhenius和Hensel-Spittel (HS) 模型进行比较.
- 为超合金加工中有限元模拟提供分析基础.
主要方法:
- 对基于的超级合金进行了热压缩测试,其温度范围为 (850-1200°C) 和拉伸率为 (0.01-10秒-1).
- 使用泰勒数列扩展和部分导数开发了一个新的构成模型.
- 使用相关系数 (R),根平均平方误差 (RMSE),二次误差和 (SSE) 和绝对误差和 (SAE) 评估模型性能.
主要成果:
- 这种新型模型显示出更高的预测准确度,R=0.9948,RMSE=22.5,SSE=16,356,SAE=5561 MPa.
- 发现对数应力-温度关系大致是线性的,通过二度多项式很好地描述.
- 对数式应力-对数式应变速率关系被一个三度多项式精确地捕获.
结论:
- 拟议的构成模型显著提高了预测基超级合金的高温流动行为.
- 该模型的准确性为有限元分析提供了坚实的基础,改善了工艺控制和制造效率.
- 这项研究促进了航空航天领域超级合金高温成型过程的优化,并为未来的材料建模提供了参考.
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