Ionitrification Kinetics of Two Commercial Steels

Abstract

The penetration of nitrogen into two commercial steels (Nitralloy 135M and AISI 4140) was studied under glow-discharge conditions. Comparisons are made with those steels conventionally nitrided. With the use of identical conditions of temperature and time, the depth of penetration was observed to be consistently higher for ion-nitrided samples than for gas-nitrided samples. Further, the thickness of the white layer (Fe4N) is substantially less for ion-nitrided specimens than for those specimens commercially nitrided. The dual role of hydrogen ions in cleansing the work surface and in inhibiting the growth of the surface-layer nitrides was established.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1970
Accession Number
AD0709582

Entities

People

  • William D. Soccorsy
  • William T. Ebihara

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Electrodes
  • Engineering
  • Environment
  • Glow Discharges
  • Hardness
  • Hydrogen
  • Ions
  • Materials
  • Measurement
  • Nitrides
  • Nitriding
  • Nitrogen
  • Nitrogen Compounds
  • Protons
  • Square Roots
  • Surface Finishing
  • Thickness

Fields of Study

  • Materials science

Readers

  • Aquatic Ecology
  • Materials Science and Engineering.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).