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Digital Image Correlation Study of Plastic Deformation and Fracture in Fully Martensitic Steels

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Abstract

Plastic deformation and fracture of two grades of fully martensitic steel are investigated with a miniature tensile stage, a custom image acquisition algorithm and digital image correlation. The image acquisition algorithm controls the camera framing rate according to user defined load, displacement and timing thresholds. This provides a greater number of images captured during periods of rapid load change over small displacements. True stress–true strain curves reveal substantial differences in material ductility and failure behavior. Fracture surfaces are examined using scanning electron microscopy and energy dispersive spectroscopy to provide insight into differences in the tensile behaviors observed for these steels.

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Acknowledgements

The authors wish to thank J. Shotts for invaluable help with DASYLab programming, W Tong for many illuminating discussions on DIC analysis, and Y. Myasnikova for expert assistance with the SEM and EDS analyses.

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Authors and Affiliations

  1. General Motors Corporation, MC 480-111-S60, 30200 Mound Rd., Warren, MI, 48090-9010, USA

    V. Savic, L. G. Hector Jr & J. R. Fekete

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  1. V. Savic
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  2. L. G. Hector Jr
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  3. J. R. Fekete
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Correspondence to V. Savic.

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Savic, V., Hector Jr, L.G. & Fekete, J.R. Digital Image Correlation Study of Plastic Deformation and Fracture in Fully Martensitic Steels. Exp Mech 50, 99–110 (2010). https://doi.org/10.1007/s11340-008-9185-6

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  • DOI: https://doi.org/10.1007/s11340-008-9185-6

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