Study of the effect of grain size on the dynamic mechanical properties of microalloyed steels
Data(s) |
25/01/2009
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Resumo |
In the present paper the effect of grain refinement on the dynamic response of ultra fine-grained (UFG) structures for C–Mn and HSLA steels is investigated. A physically based flow stress model (Khan-Huang-Liang, KHL) was used to predict the mechanical response of steel structures over a wide range of strain rates and grain sizes. However, the comparison was restricted to the bcc ferrite structures. In previous work [K. Muszka, P.D. Hodgson, J. Majta, A physical based modeling approach for the dynamic behavior of ultra fine-grained structures, J. Mater. Process. Technol. 177 (2006) 456–460] it was shown that the KHL model has better accuracy for structures with a higher level of refinement (below 1 μm) compared to other flow stress models (e.g. Zerrili-Armstrong model). In the present paper, simulation results using the KHL model were compared with experiments. To provide a wide range of the experimental data, a complex thermomechanical processing was applied. The mechanical behavior of the steels was examined utilizing quasi-static tension and dynamic compression tests. The application of the different deformation histories enabled to obtain complex microstructure evolution that was reflected in the level of ferrite refinement.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier SA |
Relação |
http://dro.deakin.edu.au/eserv/DU:30022580/muszka-studyoftheeffectofgrain-2009.pdf http://dx.doi.org/10.1016/j.msea.2008.09.069 |
Palavras-Chave | #grain refinement #flow stress model #dynamic behavior #FEM #microalloyed steels |
Tipo |
Journal Article |