The effect of hybrid surface modification; Combination of fine particle bombardment treatment and nitriding, on fatigue properties of steel

Shoichi Kikuchi, Jun Komotori, Yutaka Kameyama, Kengo Fukazawa

Research output: Contribution to journalConference article

Abstract

In order to clarify the effects of the hybrid surface modification process; a combination of Fine Particle Bombardment (FPB) treatment and nitriding, on the fatigue properties of AISI 4135 steel (stress concentration factor: α=2.36), high cycle fatigue tests were carried out with a rotational bending machine at room temperature. Observations of fracture surfaces and measurements of hardness and residual stress distributions were carried out to investigate the fracture mechanism and fatigue strength. It was revealed that treating process sequence did affect residual stress distributions. Compressive residual stress generated at the surface of FPB treated specimen after nitriding was higher than that of the one FPB treated before nitriding. It was clarified that the higher the specimen hardness was, the higher compressive residual stress was generated at the surface. Therefore, FPB treatment after nitriding increased the fatigue strength of steel.

Original languageEnglish
Pages (from-to)215-218
Number of pages4
JournalKey Engineering Materials
Volume353-358
Issue numberPART 1
DOIs
Publication statusPublished - 2007 Jan 1
EventAsian Pacific Conference for Fracture and Strength (APCFS'06) - Sanya, Hainan Island, China
Duration: 2006 Nov 222006 Nov 25

Keywords

  • Compound layer
  • Fatigue
  • Fish-eye
  • Hardness
  • Nitriding
  • Peening
  • Residual stress
  • Surface treatment

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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