Effect of fine-grained microstructure induced by induction-heating fine particle peening treatment on fatigue properties of structural steel (0.45%C)

Kazue Murai, Ryota Toyama, Jun Komotori, Kengo Fukazawa, Yoshitaka Misaka, Kazuhiro Kawasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To improve the fatigue properties of structural steel, a novel surface modification process which combines high-frequency induction heating (IH) with fine particle peening (FPP) was developed. IH-FPP treatment was performed on the surface of structural steel specimens (0.45%C) at temperatures from 600 to 750 °C, with peening times of 60 and 120 s. To determine the characteristics of the treated surfaces, the microstructure was observed using an optical microscope and a scanning electron microscope. Vickers hardness and residual stress distributions were also measured. The characteristics of fine-grained microstructures were examined by electron backscatter diffraction. Furthermore, in order to investigate the effect of the grain refinement achieved by IH-FPP treatment, rotational bending fatigue tests were performed on treated specimens. Results showed that IH-FPP treatment created fine-grained microstructures beneath the surfaces of steel samples. The average ferrite grain size was 4.06 μm for a treatment temperature of 700 °C, and finally 0.76 μm for 600 °C. This was due to dynamic recrystallization in the processed region. IH-FPP treated specimens exhibited a higher fatigue strength than untreated specimens. As almost no compressive residual stress was measured in the treated or untreated specimens, the increase in fatigue strength resulting from IH-FPP treatment was due solely to grain refinement.

Original languageEnglish
Title of host publication11th International Fatigue Congress
PublisherTrans Tech Publications
Pages1482-1487
Number of pages6
ISBN (Print)9783038350088
DOIs
Publication statusPublished - 2014 Jan 1
Event11th International Fatigue Congress, FATIGUE 2014 - Melbourne, VIC, Australia
Duration: 2014 Mar 22014 Mar 7

Publication series

NameAdvanced Materials Research
Volume891-892
ISSN (Print)1022-6680

Other

Other11th International Fatigue Congress, FATIGUE 2014
CountryAustralia
CityMelbourne, VIC
Period14/3/214/3/7

    Fingerprint

Keywords

  • Fatigue strength
  • Fine particle peening
  • Fine-grained microstructures
  • Induction heating
  • Surface modification

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Murai, K., Toyama, R., Komotori, J., Fukazawa, K., Misaka, Y., & Kawasaki, K. (2014). Effect of fine-grained microstructure induced by induction-heating fine particle peening treatment on fatigue properties of structural steel (0.45%C). In 11th International Fatigue Congress (pp. 1482-1487). (Advanced Materials Research; Vol. 891-892). Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/AMR.891-892.1482