Changes in slip band etching characteristics of INCONEL718 due to high-temperature low-cycle fatigue

Shin ichi Komazaki, Yutaka Watanabe, Tetsuo Shoji

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Etching properties of INCONEL718 with various degrees of fatigue damage have been investigated. The etching properties have been found to be sensitive to low-cycle fatigue damage given to the material. Low-cycle fatigue damage was simulated using load-controlled uniaxial fatigue tests at 600 °C and also at room temperature, and samples with various degrees of fatigue damage were prepared. A chemical etching technique was utilized to detect fatigue damage, and it was found that the etching method preferentially etches persistent slip bands (PSBs) in the fatigue-damaged materials. The density of slip bands increased with increased fatigue life fraction and showed an unique correlation with a usage factor N/Nf In conclusion, an applicability of the etching technique to fatigue damage evaluation has been suggested.

Original languageEnglish
Pages (from-to)1481-1488
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume63 A
Issue number611
DOIs
Publication statusPublished - 1997 Jan 1

ASJC Scopus subject areas

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

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