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<p>The influence of surface alloying during the formation of a&#xa0;surface nanocrystalline structure by severe plastic deformation on the contact fatigue of ShKh15 steel in an oil and corrosive-abrasive medium was studied. The alloying of the surface nanostructure increases the contact fatigue resistance, while the degree of influence depends on the ratio of “useful”, “neutral”, and “harmful” alloying elements as segregations on the grain boundaries. Specimens alloyed with carbon, silicon, and nickel have the highest contact fatigue resistance: their contact fatigue life in oil increases in 1.9&#xa0;times compared with thermal-treated ones, and in corrosive-aggressive medium increases in 4.7&#xa0;times.</p>

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Influence of surface nanostructure alloying on ShKh15 steel contact fatigue

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • O. V. Maksymiv,
  • V. I. Kyryliv,
  • T. M. Kravchyshyn,
  • B. P. Chaikovskyi,
  • I. H. Yaroshovych

摘要

The influence of surface alloying during the formation of a surface nanocrystalline structure by severe plastic deformation on the contact fatigue of ShKh15 steel in an oil and corrosive-abrasive medium was studied. The alloying of the surface nanostructure increases the contact fatigue resistance, while the degree of influence depends on the ratio of “useful”, “neutral”, and “harmful” alloying elements as segregations on the grain boundaries. Specimens alloyed with carbon, silicon, and nickel have the highest contact fatigue resistance: their contact fatigue life in oil increases in 1.9 times compared with thermal-treated ones, and in corrosive-aggressive medium increases in 4.7 times.