Steel Alloy Hot Roll Simulations and Through-Thickness Variation Using Dislocation Density-Based Modeling

• Published in: Metallurgical and materials transactions. B, Process metallurgy and materials processing science Vol. 48; no. 5; pp. 2631 - 2648
• Main Authors: Jansen Van Rensburg, G. J., Kok, S., Wilke, D. N.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2017; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Computer simulation; Deformation; Deformation mechanisms; Dislocation density; Finite element method; High strength low alloy steels; Hot rolling; Materials Science; Mathematical analysis; Metallic Materials; Metallurgy; Nanotechnology; Recrystallization; Schedules; Steel alloys; Structural Materials; Surfaces and Interfaces; Thin Films; Metal Slab; Dislocation Density-based Model; Reduction Schedule; Through-thickness Variation; Predict Material Response
• ISSN: 1073-5615; 1543-1916
• DOI: 10.1007/s11663-017-1024-7

Different roll pass reduction schedules have different effects on the through-thickness properties of hot-rolled metal slabs. In order to assess or improve a reduction schedule using the finite element method, a material model is required that captures the relevant deformation mechanisms and physics. The model should also report relevant field quantities to assess variations in material state through the thickness of a simulated rolled metal slab. In this paper, a dislocation density-based material model with recrystallization is presented and calibrated on the material response of a high-strength low-alloy steel. The model has the ability to replicate and predict material response to a fair degree thanks to the physically motivated mechanisms it is built on. An example study is also presented to illustrate the possible effect different reduction schedules could have on the through-thickness material state and the ability to assess these effects based on finite element simulations.