Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1581291 | Materials Science and Engineering: A | 2009 | 9 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
K. Muszka, P.D. Hodgson, J. Majta,