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Positron Studies of Subsurface Zone in Pure Iron Induced by Sliding

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Abstract

Positron annihilation spectroscopy and microhardness measurements were performed for pure iron samples after dry sliding. Well-defined depth profiles of edge dislocations decorated by vacancies and vacancy clusters were observed in the subsurface zone (SZ) of the samples studied. The vacancy clusters contained more than ten vacancies and their concentration decreased with the depth from the worn surface. Like in other metals studied, the depth profile of the defects detected exhibited the exponential decay with the depth. The total depth of the SZ was correlated with the load applied during sliding but did not exceed 220 μm. The defect profile in the SZ was revealed also in raw iron samples after dry sliding and blasted iron samples. In the case of raw iron, the profile induced by sliding overlaps defect structure which already exists in a raw material.

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Acknowledgments

The author expresses his gratitude to the Ministry of Science and Higher Education (Poland) which supports this work by grant No. N N507 478637.

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Authors and Affiliations

  1. Institute of Physics, Opole University, ul. Oleska 48, 45-052, Opole, Poland

    Jerzy Dryzek

  2. Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342, Kraków, Poland

    Jerzy Dryzek

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  1. Jerzy Dryzek
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Correspondence to Jerzy Dryzek.

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Dryzek, J. Positron Studies of Subsurface Zone in Pure Iron Induced by Sliding. Tribol Lett 42, 9–15 (2011). https://doi.org/10.1007/s11249-010-9742-x

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