Researcher:
Uslu, Mehmet Can

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Master Student

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Mehmet Can

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Uslu

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Uslu, Mehmet Can

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2010 - 20133

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Researcher Of Publications: search.filters.isAuthorOfPublication.ae3fc040-e526-459e-af8a-430bdf68b1d9

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    Modeling the role of external stresses on the austenite-to-bainite phase transformation in 51CrV4 steel
    (Institute of Physics (IOP) Publishing, 2011) Lambers, H-G; Tschumak, S.; Maier, H. J.; N/A; Department of Mechanical Engineering; Uslu, Mehmet Can; Canadinç, Demircan; Master Student; Faculty Member; Department of Mechanical Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; 23433
    A new model is proposed to successfully predict the initiation and evolution of the austenite-to-bainite phase transformation, capturing specifically the time-dependent transformation kinetics. In particular, the isothermal bainitic transformation in 51CrV4 steel is experimentally observed for various constant stress conditions, and significant improvement is obtained in comparison with the existing models. Specifically, both the transformation kinetics and the resultant transformation strains can be simultaneously predicted using the same variant growth approach. Simulation results are in good agreement with the experiments, evidencing the success of the proposed model in describing the transformation phenomena in terms of kinetics and transformation plasticity. Furthermore, the proposed formulation provides a basis for incorporating variant-variant interactions and cementite formation in the residual austenite matrix.
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    Modeling the role of hydrogen interstitial concentration on internal stress fields in iron matrix
    (Springer, 2010) Department of Mechanical Engineering; Department of Mechanical Engineering; Uslu, Mehmet Can; Canadinç, Demircan; Master Student; Faculty Member; Department of Mechanical Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; 23433
    A numerical model was proposed to predict the hydrogen interstitial concentration in iron matrix both in the immediate surrounding of and far from an edge dislocation. The current formulation successfully incorporates the relaxation effect and, thus, correctly predicts the stress state around the dislocations.
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    PublicationOpen Access
    A comparative analysis of austenite-to-martensite and austenite-to-bainite phase transformation kinetics in steels
    (Taylor _ Francis, 2013) Holzweissig, M.J.; Lambers, H.-G.; Maier, H.J.; Department of Mechanical Engineering; Uslu, Mehmet Can; Canadinç, Demircan; Faculty Member; Department of Mechanical Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; 23433
    This paper presents a comparison of the macroscopic transformation strain evolution as a function of the bainite and martensite phase fractions in steels. Specifically, the evolution of anisotropic strain with phase fraction follows a linear trend for the martensitic transformation due to continuous stress-induced variant selection. In the case of bainitic transformation, the anisotropic strain evolves non-linearly owing to diffusion, minimizing the distortion around the bainitic sheaves and further promoting stress-induced variant selection at the early stages of the bainitic phase transformation. However, this effectiveness is reduced when the bainitic sheaves start constricting the growth of each other.