Effect of surface treatment and crystal orientation on hot corrosion of a Ni-based single-crystal superalloy

X. Montero*, A. Ishida, T. M. Meißner, H. Murakami, M. C. Galetz

*この研究の対応する著者

研究成果: Article査読

25 被引用数 (Scopus)

抄録

The effect of surface preparation and crystal orientation was investigated for a TMS-138 single crystal superalloy under Type I and Type II hot corrosion conditions. The superalloy was cut along the {100} and {110} planes on which grit blasting, mechanical polishing and electro-polishing surface finishes were conducted. At 900 °C grit blasting or electropolishing distorted the surface and altered the γ-γ’ structure of the alloy provoking higher corrosion rates than on mechanically polished surfaces. The electropolished surface revealed that crystal planes with higher atomic number density have an increased corrosion resistance. The anisotropy effects were not observed with Type II exposures.

本文言語English
論文番号108472
ジャーナルCorrosion Science
166
DOI
出版ステータスPublished - 2020 4月 15

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 材料科学(全般)

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