修改了Fields-Backofen和Zerilli-Armstrong构成模型,以预测基于的合金中的热变形行为
1Department of Mechanical Engineering, Faculty of Engineering, Fayoum University, Fayoum, 63514, Egypt. abdallah.shokry@fayoum.edu.eg.
Scientific reports
|April 10, 2024
概括
修改后的构成模型增强了对合金热变形行为的预测. 改进的菲尔兹-巴科芬模型显示了对合金流量应力预测的卓越准确性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 金工业是金工业的一个方面.
背景情况:
- 在热变形过程中准确预测材料流动行为对于优化制造工艺至关重要.
- 基于的合金在航空航天和汽车工业中至关重要,需要精确建模其热力学性能.
- 现有的构成模型可能无法完全捕捉合金在热工作条件下的复杂流应力行为.
研究的目的:
- 修改和评估菲尔德斯-巴科芬和泽里利-阿姆斯特朗对基合金的构成模型的预测能力.
- 为了提高在热变形期间的流动行为预测的准确性.
- 用不同合金的实验数据验证修改后的模型.
主要方法:
- 修改现象学Fields-Backofen和基于物理的Zerilli-Armstrong构成模型.
- 对Ti55531合金的热变形进行实验研究.
- 使用统计参数评估模型可预测性:相关系数 (R),平均绝对相对误差 (AARE) 和根平均平方误差 (RMSE).
- 用SP700和TC4合金验证修改后的模型.
主要成果:
- 修改后的菲尔兹-巴科芬模型对Ti55531表现出色,达到R=0.996,AARE=3.34%,RMSE=5.64 MPa.
- 改进的泽里利-阿姆斯特朗模型的改进版本显示了强大的结果,R=0.992,AARE=3.52%,RMSE=9.15 MPa.
- 两种修改模型都表现出高精度和与其他合金数据的良好验证.
结论:
- 修改后的菲尔兹-巴科芬模型在预测合金的热变形流动行为方面取得了显著的改进.
- 增强的泽里利-阿姆斯特朗模型也提供了准确的预测,作为一个可靠的替代方案.
- 这些精细的模型是模拟和优化基材料的热加工过程的宝贵工具.
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