Investigation of wear performance of R260 and R350HT rails after vibratory peening and ultrasonic nanocrystal surface modification

Karademir I., Neccaroglu V., Karamanlı İ. A., Das T., Efe Y., Unal O.

Materials Science and Technology (United Kingdom), 2025 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1177/02670836251317861
  • Dergi Adı: Materials Science and Technology (United Kingdom)
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: deformation, gradient structure, rail steel, surface nanocrystallization, UNSM, vibratory peening, wear
  • Yozgat Bozok Üniversitesi Adresli: Evet

Özet

In this study, the effects of ultrasonic nanocrystal surface modification (UNSM) and severe vibratory peening (SVP) of R260 and R350HT rail steels were investigated. The surface treatments resulted effective grain size reduction in the surface layers. While surface roughness decreased due to UNSM, SVP generally increased surface roughness. SVP demonstrated a significant effect on the microhardness. While the microhardness of the untreated sample was around 320 HV, the microhardness of R350HT peened for 4 h and 10 h increased to 390 and 470 HV, respectively. The UNSM treated specimens showed significant improvements, especially in surface roughness, which improved the wear performance. SVP treated specimens showed significant improvements in friction and wear performance due to the improvement on microhardness.