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

Authors

• Yakov B. Unigovski
• Dmitry Fishman
• Liat Fishman
• Liron Shichman
• Ofir Moshe
• Roni Shneck
• Emmanuel Gutman

Publication Date

2021

Abstract

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.

DOI

10.55713/jmmm.v31i3.1128

First Page

53

Last Page

62

Recommended Citation

B. Unigovski, Yakov; Fishman, Dmitry; Fishman, Liat; Shichman, Liron; Moshe, Ofir; Shneck, Roni; and Gutman, Emmanuel (2021) "The effect of artificial defects on the fatigue characteristics of AISI 4340 steel," Journal of Metals, Materials and Minerals: Vol. 31: No. 3, Article 7.
DOI: 10.55713/jmmm.v31i3.1128
Available at: https://digital.car.chula.ac.th/jmmm/vol31/iss3/7