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Fracture Mechanisms of C-Mn(V-Nb-Ti) Microalloyed Steel Under a Decreasing Temperature Cycle


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DOI: https://doi.org/10.15866/ireme.v17i10.23853

Abstract


This study aims to investigate the hot ductility and fracture mechanisms of microalloyed steel commonly used in industrial production, especially when it starts as a rolling stock material. In order to simulate the typical thermomechanical processes experienced by this steel, the samples have been exposed to a solution treatment at 1200 °C followed by a well-defined precipitation treatment cycle before deformation. The experiments on hot deformation have been conducted at a consistent deformation rate of 1.96×10-3 s-1 over a range of temperatures ranging from 700 °C to 1050 °C. Through thorough analysis, a correlation between the extent of damage experienced during the hot deformation process and the specific fracture characteristics observed in specimens deformed under tension has been established. This link between damage and fracture type provides insights into the key factors that influence the overall mechanical behavior of microalloyed steel under these conditions. The findings of this investigation have substantial implications for the industrial production of microalloyed steel and can contribute to a more informed approach in selecting appropriate process parameters and optimizing the material's hot ductility and fracture resistance.
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Keywords


Microalloyed Steel; Hot Tensile; Flow Stress; Fracture Mechanisms

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References


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