A repair process for fatigue damage using plasma nitriding

ALSARAN A., Kaymaz I., Celik A., YETIM F., Karakan M.

SURFACE & COATINGS TECHNOLOGY, cilt.186, sa.3, ss.333-338, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 186 Sayı: 3
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.surfcoat.2003.12.017
  • Dergi Adı: SURFACE & COATINGS TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.333-338
  • Anahtar Kelimeler: plasma nitriding, fatigue damage, repair, LOW-ALLOY STEEL, STRUCTURAL CHARACTERIZATION, AISI-5140 STEEL, BEHAVIOR
  • Atatürk Üniversitesi Adresli: Evet

Özet

The effect of plasma nitriding on the fatigue life of AISI 4140 steel having a certain fatigue loading has been investigated. Untreated and nitrided specimens were subjected to fatigue loading up to a certain level, and then nitrided for 0.5 h and subjected to fatigue testing again. It was observed that the process applied to untreated specimens improves the fatigue life of the specimens that were plasma nitrided for 0.5 h due to the subsurface crack nucleation. However, for already nitrided specimens, a significant improvement in the fatigue life has not been observed by applying the proposed process because the compound layer on the surface prevents the diffusion during the second nitriding. (C) 2004 Elsevier B.V All rights reserved.