Thermally activated processes of fatigue crack growth in steels

Masaki Tanaka, Atsushi Fujii, Hiroshi Noguchi, Kenji Higashida

Research output: Contribution to journalArticle

Abstract

Fatigue crack growth rates in steels at high and low temperatures have been investigated using Paris curves. The fatigue crack growth rates at high temperatures are quite different from those at low temperatures. Arrhenius plots between fatigue crack growth rate (da/dN) and test temperatures at constant stress intensity factor range (ΔKI) indicate a difference of the rate-controlling process for fatigue crack growth with temperature. Slip deformation at the crack tip governs fatigue crack growth at high temperatures, while hydrogen diffusion is associated with crack growth at low temperatures.

Original languageEnglish
Pages (from-to)95-102
Number of pages8
JournalPhilosophical Magazine Letters
Volume94
Issue number2
DOIs
Publication statusPublished - Feb 1 2014

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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