High-Cycle Fatigue Properties and Damage Mechanism of Q345B Structural Steel

XL Hu, Y J Liu, Kashif Khan, Q Y Wang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The high-cycle fatigue behavior of Q345B structural steel was investigated experimentally. Highfrequency vibration fatigue testing machine and scanning electron microscopy were used to study the high-cycle fatigue S–N curve characteristics and crack initiation mechanism at ambient temperature. The surface temperature of the specimens was monitored. The relation between the fatigue limit and the amount of heat dissipation was also investigated. It was found that the fatigue life changed inversely with the stress amplitude in the high-cycle range. The fatigue limit in high cycle range was obtained from heat dissipation in the specimen and found to have good agreement with the S–N curve. The crack initiation was attributed to the surface defects and the persistent slip bands due to the cycle slip in fatigue loading.
Original languageEnglish
Pages (from-to)67-74
Number of pages8
JournalStrength of Materials
Volume49
Issue number1
DOIs
Publication statusPublished - 4 Apr 2017

Keywords

  • Q345B structural steel
  • high-cycle fatigue
  • heat dissipation
  • fatigue strength
  • fatigue crack initiation mechanism

Fingerprint Dive into the research topics of 'High-Cycle Fatigue Properties and Damage Mechanism of Q345B Structural Steel'. Together they form a unique fingerprint.

  • Cite this