Modeling the influence of bainite transformation on the flow behavior of steel using a macroscale finite element analysis

IF 9.4 1区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Plasticity Pub Date : 2024-11-28 DOI:10.1016/j.ijplas.2024.104189

Towhid Faraji, Missam Irani, Grzegorz Korpala, Christoph Ostwald, Ansgar Hatscher, Ulrich Prahl

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引用次数: 0

Abstract

This study comprehensively investigates the kinetics of bainitic ferrite transformation in steel alloys by integrating experimental results, finite element analysis, and thermodynamic modeling. Using a dilatometer and Gleeble tests, empirical data were acquired to calibrate the Bhadeshia and Hensel-Spittel models, forming the basis for subsequent finite element simulations. Owing to the high importance of temperature in bainite transformation, the accuracy of the predicted temperature fields was validated precisely against experimental measurements, confirming the reliability of the methodology. A modified Bhadeshia model was proposed incorporating the influence of the applied shear stress on the activation energy, thereby emphasizing the temperature-dependent

C_{stress}

$C_{stress}$ coefficient. The electron backscatter diffraction results validate the finite element model, and further exploration reveals the implications for fracture patterns and density changes due to bainitic transformation. This study contributes to a nuanced understanding of bainitic ferrite kinetics, offering valuable insights for alloy design and optimization under various thermomechanical conditions, and paving the way for advanced research on phase transformation kinetics and material behavior.

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利用宏观尺度有限元分析建立贝氏体转变对钢材流动行为影响的模型

本研究综合了实验结果、有限元分析和热力学模型，全面研究了钢合金中贝氏体铁素体转变的动力学。通过使用扩张仪和格里布尔试验，获得了校准 Bhadeshia 和 Hensel-Spittel 模型的经验数据，为随后的有限元模拟奠定了基础。由于温度在贝氏体转变中的重要性，预测温度场的准确性与实验测量结果进行了精确验证，从而证实了该方法的可靠性。我们提出了一个改进的巴德夏模型，该模型考虑了外加剪应力对活化能的影响，从而强调了与温度相关的 CstressCstress 系数。电子反向散射衍射结果验证了有限元模型，进一步的探索揭示了贝氏体转变对断裂模式和密度变化的影响。这项研究有助于深入理解贝氏体铁素体动力学，为各种热机械条件下的合金设计和优化提供了宝贵的见解，并为相变动力学和材料行为的高级研究铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Plasticity 工程技术-材料科学：综合

CiteScore

15.30

自引率

26.50%

发文量

256

审稿时长

46 days

期刊介绍： International Journal of Plasticity aims to present original research encompassing all facets of plastic deformation, damage, and fracture behavior in both isotropic and anisotropic solids. This includes exploring the thermodynamics of plasticity and fracture, continuum theory, and macroscopic as well as microscopic phenomena. Topics of interest span the plastic behavior of single crystals and polycrystalline metals, ceramics, rocks, soils, composites, nanocrystalline and microelectronics materials, shape memory alloys, ferroelectric ceramics, thin films, and polymers. Additionally, the journal covers plasticity aspects of failure and fracture mechanics. Contributions involving significant experimental, numerical, or theoretical advancements that enhance the understanding of the plastic behavior of solids are particularly valued. Papers addressing the modeling of finite nonlinear elastic deformation, bearing similarities to the modeling of plastic deformation, are also welcomed.