Abstract

Mathematical models are among the new approaches employed to predict the properties of any material under various conditions. Mathematical models are essential for not only understanding the material properties but also estimating the cost of design, product life, and failure criteria of the product. Therefore, in the current investigation, the hot deformation (HD) behaviour and microstructure alteration of deformed AA7150-5 wt% B₄C composite was studied through a mathematical model. The new AA7150-5 wt% B4C composite was fabricated through an ultrasonic-probe assisted (20 KHz, 1000 W) stir casting process. The hot compression test was performed on a hydraulic press for various deformation temperatures (623–773 K) and strain rates (0.01–1 s^− 1). Based on the outcome, it is inferred that the flow stresses and microstructures of AA7150-5 wt% B₄C composite was significantly altered during the hot compression test under various deformation conditions. The constitutive and dynamically recrystallized grain (DRXed) models were developed as a function of various deformation conditions of deformed AA7150-5 wt% B₄C composite, which was then applied to forecast the flow stress and grain size behaviour for different deformation conditions. The flow stress and DRXed grain size were obtained through the proposed constitutive and DRXed models are correlated with experimental results, with excellent accuracy. The models developed are reliable to predict the AA7150-5 wt% B₄C properties for various conditions.

Graphic abstract

中文翻译：

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预测变形的AA7150-5 wt％B4C复合材料的流动应力和动态再结晶晶粒尺寸的数学模型，该复合材料采用超声探头辅助搅拌铸造工艺制造

摘要

数学模型是用来预测各种条件下任何材料特性的新方法之一。数学模型不仅对于了解材料特性至关重要，而且对于估算产品的设计成本、产品寿命和故障标准也是必不可少的。因此，在目前的研究中，通过数学模型研究了变形 AA7150-5 wt% B ₄ C 复合材料的热变形 (HD) 行为和微观结构变化。新的 AA7150-5 wt% B4C 复合材料是通过超声探针辅助 (20 KHz, 1000 W) 搅拌铸造工艺制造的。热压缩试验在液压机上进行，不同变形温度 (623–773 K) 和应变速率 (0.01–1 s ^{− 1}）。根据结果​​，可以推断出 AA7150-5 wt% B ₄ C 复合材料的流动应力和微观结构在各种变形条件下的热压缩试验期间发生了显着变化。本构和动态再结晶晶粒 (DRXed) 模型被开发为变形 AA7150-5 wt% B ₄ C 复合材料的各种变形条件的函数，然后应用于预测不同变形条件下的流动应力和晶粒尺寸行为。流动应力和 DRXed 晶粒尺寸是通过提出的本构模型获得的，DRXed 模型与实验结果相关，具有出色的精度。开发的模型可以可靠地预测各种条件下的 AA7150-5 wt% B ₄ C 特性。

图形摘要