The effect of artificial defects on the fatigue characteristics of AISI 4340 steel

Yaakov B. Unigovski, Dmitry Fishman, Liat Fishman, Liron Shichman, Ofir Moshe, Roni Z. Shneck, Emmanuel M. Gutman

Research output: Contribution to journalArticlepeer-review


This study examined the fatigue life (Nf) and fatigue limit (FL) of AISI 4340 steel in relation to surface roughness, artificial defects and shot peening. Artificial surface defects on fatigue specimens were obtained by electrical discharge machining (EDM) or by pre-corrosion in 3.5% NaCl and perchloric acid solutions, followed by a fatigue test. The presence of artificial defects of various sizes, taken into account by the √area parameter, led to a significant decrease in fatigue characteristics, while shot peening contributed to their noticeable improvement. Defects resulting from electrochemical corrosion had a much greater negative effect on fatigue life than defects introduced by EDM.

Original languageEnglish
Pages (from-to)53-62
Number of pages10
JournalJournal of Metals, Materials and Minerals
Issue number3
StatePublished - 1 Jan 2021


  • Artificial defects
  • High cyclic fatigue
  • Low alloy steel
  • Shot peening
  • Surface roughness

ASJC Scopus subject areas

  • Ceramics and Composites
  • Metals and Alloys
  • Polymers and Plastics
  • General Materials Science
  • Biomaterials
  • Materials Science (miscellaneous)


Dive into the research topics of 'The effect of artificial defects on the fatigue characteristics of AISI 4340 steel'. Together they form a unique fingerprint.

Cite this