Fatigue properties of inconel 718 in long life region at elevated temperature

N. Yan, N. Kawagoishi, Q. Chen, Q. Y. Wang, H. Nisitani, E. Kondo

Research output: Contribution to journalConference article

14 Citations (Scopus)

Abstract

The fatigue properties of Inconel 718 in long life region up to 108 cycles were investigated under rotating bending at room temperature and 500°C. The early propagation of a crack was suppressed by oxide induced crack closure. Consequently, fatigue strength was higher at 500°C than at room temperature. Surface fracture occurred at high stress levels and internal fracture occurred in long life region beyond 107 cycles at 500°C. Correspondingly, S-N curve at 500°C presented in a step-wise shape, compared to the conventional one-step shape at room temperature. Intergranular cracking was observed at the origins of internal fracture at 500°C.

Original languageEnglish
Pages (from-to)321-326
Number of pages6
JournalKey Engineering Materials
Volume243-244
DOIs
Publication statusPublished - Jan 1 2003
Externally publishedYes
EventProceedings of the International Conference on Experimental and Computational Mechanics in Engineering - Dunhuang, China
Duration: Aug 24 2002Aug 27 2002

All Science Journal Classification (ASJC) codes

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

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