Failure of a diesel engine injector nozzle by cavitation damage

Asi O.

Engineering Failure Analysis, cilt.13, sa.7, ss.1126-1133, 2006 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Sayı: 7
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.engfailanal.2005.07.021
  • Dergi Adı: Engineering Failure Analysis
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1126-1133
  • Anahtar Kelimeler: Cavitation damage, Failure analysis, Fatigue, Injector nozzle
  • Uşak Üniversitesi Adresli: Hayır

Özet

A failure investigation has been conducted on a diesel engine injector nozzle used in a truck, which is made from 18CrNi8, a case hardening steel. The nozzle has been found cracked after about 400 h in service. An evaluation of the failed injector nozzle was undertaken to assess its integrity that included a visual examination, photo documentation, chemical analysis, micro-hardness measurement, and metallographic examination. The failure zones were examined with the help of a scanning electron microscope equipped with EDX facility. Results indicate that the failure occurred because of cavitation damage in the internal surface of the nozzle followed by fatigue cracking. © 2005 Elsevier Ltd. All rights reserved.