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. 2020 May 20;13(10):2359. doi: 10.3390/ma13102359

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Change in friction coefficient and volume loss (hardened and tempered samples). (a) Coefficient of friction for material X153CrMoV12. (b) Volume loss for material X153CrMoV12. (c) Coefficient of friction for material X37CrMoV5-1. (d) Volume loss for X37CrMoV5-1. (e) Coefficient of friction for material X45NiCrMo4. (f) Volume loss forX45NiCrMo4.