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 articlepeer-review

18 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 - 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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