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Effects of Strain Rate on Mechanical Properties and Fracture Mechanisms in a Dual Phase Steel

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Dynamic Behavior of Materials, Volume 1

Abstract

Strain rate sensitivity of sheet steels affects their formability and crashworthiness. This contribution reports strain rate sensitivity and effects of strain rate on fracture micro-mechanisms in a commercial dual phase sheet steel (DP590). Uniaxial tensile tests were performed at strain rates of 10−4/s, 1/s and 3200/s to characterize effects of strain rate on ultimate tensile strength and ductility. Fracture surfaces of the tested specimens were quantitatively characterized using stereological techniques to understand the fracture micro-mechanisms. Obtained data indicates that the basic fracture micro-mechanism remains the same with respect to strain rate but strain partitioning in ferrite and martensite is a strong function of strain rate.

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Acknowledgements

This work was funded through an unrestricted research grant from ArcelorMittal Global R&D East Chicago to the Georgia Tech Foundation. The financial support is gratefully acknowledged.

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    Authors and Affiliations

    1. Georgia Institute of Technology, North Avenue, Atlanta, GA, 30332, USA

      Sukanya M. Sharma, Kishlay Mishra, Arun M. Gokhale & Naresh N. Thadhani

    2. University of Alabama, Tuscaloosa, AL, 35487, USA

      Omar Rodriguez & Paul Allison

    3. University of Mississippi, Oxford, MS, 38677, USA

      Wilburn R. Whittington

    4. Global R&D, ArcelorMittal, East Chicago, IN, 46312, USA

      Shrikant P. Bhat

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    1. Sukanya M. Sharma
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    2. Kishlay Mishra
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    Correspondence to Sukanya M. Sharma .

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    Editors and Affiliations

    1. New Mexico Institute of Mining and Technology, Socorro, New Mexico, USA

      Jamie Kimberley

    2. Drexel University, Philadelphia, Pennsylvania, USA

      Leslie Lamberson

    3. National Institute of Standards and Technology, Gaithersburg, Maryland, USA

      Steven Mates

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    Sharma, S.M. et al. (2018). Effects of Strain Rate on Mechanical Properties and Fracture Mechanisms in a Dual Phase Steel. In: Kimberley, J., Lamberson, L., Mates, S. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-62956-8_34

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    • DOI: https://doi.org/10.1007/978-3-319-62956-8_34

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    • Publisher Name: Springer, Cham

    • Print ISBN: 978-3-319-62955-1

    • Online ISBN: 978-3-319-62956-8

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