Development of a Hydrogen-Based Annealing Process for Desulfurization of Single Crystalline, Nickel-Based Superalloy.

Abstract

The presence of minor amounts of sulfur (1-10 ppm) in nickel-based superalloys has been associated with reduced oxidation resistance and premature spallation of protective coatings. A hydrogen annealing process has been developed by NAWCADWAR which effectively reduces the sulfur content of superalloys. The conditions which allow effective desulfurization are delineated. Diffusion of sulfur through the superalloy is found to be the rate controlling step for the process. jg

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Document Details

Document Type
Technical Report
Publication Date
Nov 05, 1994
Accession Number
ADA294664

Entities

People

  • Julia Waldman
  • Michael A. Smith
  • T. H. Mickle
  • W. E. Frazier

Organizations

  • Naval Air Warfare Center Aircraft Divison

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerial Warfare
  • Aircrafts
  • Alloys
  • Annealing
  • Desulfurization
  • Dielectric Gases
  • Diffusion
  • Diffusion Coefficient
  • Elements
  • Engineering
  • Gas Flow
  • Hydrogen
  • Materials
  • Materials Engineering
  • Materials Science
  • Oxidation Resistance
  • Turbines

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Metallurgy
  • Surface Coatings Technology.