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Surface and Subsurface Deformation of Wear-Resistant Steels Exposed to Impact Wear

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Abstract

The impact wear resistance of four different wear-resistant steel grades was investigated using different impact bodies. Post-test evaluation of the impact tested samples was performed by different techniques including 3D surface profilometry, microhardness indentation, optical and scanning electron microscopy, and energy dispersive x-ray spectroscopy. The tribological response of the steel plates during the impact is strongly dependent on the properties of the impacting body. The subsurface deformation was found to increase with increasing impact energy and/or impact velocity and decreasing steel hardness. On a microscopic scale, a number of interesting mechanisms were revealed within the deformed impact sites. Besides an overall plastic deformation, localized deformation resulting in narrow adiabatic shear bands with an ultra-fine microstructure was observed. Within these shear bands, showing intense shearing strain, nucleation of microvoids was frequently observed. Growth and linkage of these voids lead in crack formation along the shear bands and eventually flake-like wear fragments are detached when these cracks reach the surface.

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Authors and Affiliations

  1. Department of Materials Science & Engineering, University of Connecticut, 191 Auditorium Rd, Storrs, CT, 06269-3139, USA

    Vahid Rastegar

  2. Department of Chemistry & Biomolecular Science, Clarkson University, 8 Clarkson Ave, Potsdam, NY, 13699, USA

    Anahita Karimi

Authors
  1. Vahid Rastegar
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  2. Anahita Karimi
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Correspondence to Vahid Rastegar.

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Rastegar, V., Karimi, A. Surface and Subsurface Deformation of Wear-Resistant Steels Exposed to Impact Wear. J. of Materi Eng and Perform 23, 927–936 (2014). https://doi.org/10.1007/s11665-013-0842-2

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  • DOI: https://doi.org/10.1007/s11665-013-0842-2

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