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Abstract <p>The article considers the effectiveness of combined surface treatment of 30KhGSA and 30KhGSN2A steels by shot peening (SP) and high-temperature pulsed plasma treatment (HTPP). An optimal combination SP + HTPP + SP is identified: it achieves a 15–20-fold increase in the cyclic fatigue life of ground specimens, and a twofold increase for initially shot-peened specimens. It is also shown that HTPP treatment (in selected modes in a helium environment) reduces the fatigue life of specimens by a factor of 2‒4 or more, regardless of previous machining. The results were confirmed by fatigue tests of steel specimens with a smooth surface and with a stress concentrator.</p>

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Influence of Combined Shot Peening and High-Temperature Pulsed Plasma Treatment on the Fatigue Life of Structural Steels

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • G. N. Kravchenko,
  • Yu. V. Petukhov,
  • K. G. Kravchenko

摘要

Abstract

The article considers the effectiveness of combined surface treatment of 30KhGSA and 30KhGSN2A steels by shot peening (SP) and high-temperature pulsed plasma treatment (HTPP). An optimal combination SP + HTPP + SP is identified: it achieves a 15–20-fold increase in the cyclic fatigue life of ground specimens, and a twofold increase for initially shot-peened specimens. It is also shown that HTPP treatment (in selected modes in a helium environment) reduces the fatigue life of specimens by a factor of 2‒4 or more, regardless of previous machining. The results were confirmed by fatigue tests of steel specimens with a smooth surface and with a stress concentrator.