Integrative material and process model for the correlation of phase morphology and flow behavior of spheroidization annealed low-alloyed carbon steels
Final Report Abstract
The project focused on the further development of a material-specific and widely used heat treatment process for steels, with the goal of scientifically increasing its energy and time efficiency in relation to achieving a damage-tolerant formed F+P microstructure. Specifically, it was investigated how the individual parameters of the forming annealing process, such as the chemical composition of the steel, temperature, holding time, and externally applied stress, influence the steel's microstructure and mechanical properties. The project also included precise phase-field modeling of the pearlitic transformation and spheroidization for the alloys, with the resulting microstructures being incorporated into finite element simulations for predicting crack initiation and propagation. A combination of experimental investigations and phase-field simulations provided insights into these interactions and improved the model alloy Fe-1C with varying levels of Cr and Mo. On this basis, a numerical model was successfully developed that reflects the mechanical performance of the steel based on microstructural features, with particular attention given to the degree of forming and early damage due to the morphology of cementite particles and the local stress state. The investigations were conducted within the framework of a collaboration between the IMF, which was responsible for material preparation, heat treatment, and mechanical testing, and the IMWF, which performed microstructural characterization and simulations using phase-field and finite element methods. The data from the experiments and simulations were ultimately used to train a neural network to transfer the findings to a broader range of steel materials.
Publications
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Analyzing the cementite particle size and distribution... in 2021 International Bhurban Conference on Applied Sciences and Technologies (IBCAST). 2021. IEEE
Umar, Muhammad et al.
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Exploring the Structure–Property Relationship in Spheroidized C45EC Steel Using Full Phase Crystal Plasticity Numerical Simulations. steel research international, 93(1).
Umar, Muhammad; Qayyum, Faisal; Farooq, Muhammad Umer; Guk, Sergey; Kirschner, Markus; Korpala, Grzegorz & Prahl, Ulrich
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Qualitative Investigation of Damage Initiation at Meso-Scale in Spheroidized C45EC Steels by Using Crystal Plasticity-Based Numerical Simulations. Journal of Composites Science, 5(8), 222.
Umar, Muhammad; Qayyum, Faisal; Farooq, Muhammad Umer; Guk, Sergey & Prahl, Ulrich
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Analyze particles using FIJI Image-J.
Qayyum, Faisal
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Fast Particle Analysis with FIJI ImageJ: Measure Lamella Thickness, Length, Circularity, and Spacing
Qayyum, Faisal
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Hybrid Data-Driven Deep Learning Framework for Material Mechanical Properties Prediction with the Focus on Dual-Phase Steel Microstructures. Materials, 16(1), 447.
Cheloee, Darabi Ali Cheloee; Rastgordani, Shima; Khoshbin, Mohammadreza; Guski, Vinzenz & Schmauder, Siegfried
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“International Metallurgic trade fair with congresses”- METEC, June 2023, Düsseldorf, Germany. Presentation title: “Exploring the Influence of chromium and molybdenum on pearlitic microstructure formation in 1% carbon steels”
Kawalla, Rudolf et al.
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Analyzing the Effects of Cr and Mo on the Pearlite Formation in Hypereutectoid Steel Using Experiments and Phase Field Numerical Simulations. Materials, 17(14), 3538.
Qayyum, Faisal; Darabi, Ali Cheloee; Guk, Sergey; Guski, Vinzenz; Schmauder, Siegfried & Prahl, Ulrich
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“Materials Science and Engineering Congress”-MSE, Sept. 2024, Darmstadt, Germany. Presentation title: “Investigating the Interplay of Chemistry, Processing, and Microstructure for High-Performance Spheroidized Steels Under Complex Loading Conditions”
Kawalla, Rudolf et al.
