Fatigue properties of thermally sprayed steel with Co-based self-fluxing alloy

J. Komotori, N. Qu, M. Shimizu, K. Shirai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Rotational-bending fatigue tests were performed on Co-based alloy thermally sprayed specimen with special focus on the effect of mixed NiCr weight ratio on coating microstructure and on fatigue properties. Effects of post heat treatment (fusing treatment) on coating microstructure and on fatigue strength after 107 cycles were also discussed. The results obtained are as follows: (1) There is considerable scatter in observed fatigue life for specimens sprayed with Co-based self-fluxing alloy. This is because each specimen has its own fatigue strength associated with different porosities and microstructures of coatings. (2) Fusing treatment temperature strongly affects the characteristics of sprayed coating in terms of microstructure and porosity. The fatigue strength of a sprayed specimen without fusing treatment was much lower than that of a steel substrate. An improvement of fatigue strength has been obtained by well controlled fusing treatment.

Original languageEnglish
Pages (from-to)2687-2692
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume62
Issue number604
DOIs
Publication statusPublished - 1996 Jan 1
Externally publishedYes

ASJC Scopus subject areas

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

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