Effect of Chromium Content on the Oxidation Behavior of Ni-Cr Model Alloys in Superheated Steam

Fethi Hamdani, Hiroshi Abe, Benoit Ter-Ovanessian, Bernard Normand, Yutaka Watanabe

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The present study investigated the oxidation behavior of Ni-xCr model alloys (14 ≤ x ≤ 30 wt pct) in steam at 973 K (700 °C), with particular emphasis on the influence of chromium content. Mirror polishing was employed to reduce the hardened layer, thereby avoiding the synergetic effect with dislocations in the subsurface. To elucidate the oxidation behavior, weight gain measurements and the meticulous characterization of the oxide scale were performed. The optimal Cr content (24 wt pct) corresponded to an oxidation rate slower than the parabolic rate due to the growth of a protective Cr oxide layer. Increasing the Cr content above the optimal amount led to the degradation of oxidation resistance.

Original languageEnglish
Pages (from-to)2285-2293
Number of pages9
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume46
Issue number5
DOIs
Publication statusPublished - 2015 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Effect of Chromium Content on the Oxidation Behavior of Ni-Cr Model Alloys in Superheated Steam'. Together they form a unique fingerprint.

  • Cite this