Measurement and discussion of low-temperature hot corrosion damage accumulation upon nickel-based superalloy rene 104

N. Birbilis, R. G. Buchheit

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

This study presents quantitative information regarding the extent and morphology of hot corrosion damage evolved upon the surface of nickel-based superalloy Rene 104. Exposure times under an accelerated corrosion regime at 704 °C range from 0.5 to 100 hours. Unlike oxidation, hot corrosion is observed to proceed at an alarmingly rapid rate. The evolution of high-temperature damage can be distinguished into two regimes. The first describes damage occurring at low exposure times, corresponding to what is ascribed as a phenomenon of transient oxidation, leading to a pitted surface. Following a distinguishable incubation period, hot corrosion damage proceeds such that damage depths are typically several hundreds of microns, with a generalized attack mode dominating the corrosion observed. Characteristics of the damage evolution are quantified via optical profilometry, while microscopy and XPS are used to support mechanistic interpretations.

Original languageEnglish
Pages (from-to)3224-3232
Number of pages9
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume39
Issue number13
DOIs
StatePublished - 2008

Bibliographical note

Funding Information:
The technical assistance of Mary K. Cavanaugh with the profilometry and its analysis is gratefully acknowledged. This project was supported under the Propulsion 21 scheme in conjunction with GE and NASA. NSF-DMR Grant No. 0114098 is acknowledged for the XPS equipment.

ASJC Scopus subject areas

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

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