THE MARTENSITIC TRANSFORMATION IN AN IRON : 16.5 PERCENT CHROMIUM : 4.5 PERCENT NICKEL ALLOY,

Abstract

Transmission Electron microscopy was used to study the phases and microstructural c8anges produced by various heat treatments in an Fe : Cr : Ni alloy. Two types of ma9tensite were identified in this system. Needles of b.c.c. alpha - martensite are formed in slowly cooled or quenched specimens. A small number of plates of epislon - martensite are produced by deformation at room temperature. Tempering at temperatures up to 600 C produces a dispersion of the carbide M23C6 in the b.c.c. matrix. Some fa3tors controlling the martensite and austenite in the microstructure are discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1963
Accession Number
AD0423736

Entities

People

  • Martin J. Blackburn

Organizations

  • Boeing

Tags

DTIC Thesaurus Topics

  • Alloys
  • Electron Microscopy
  • Heat Treatment
  • Iron
  • Martensite
  • Microscopy
  • Nickel Alloys
  • Tempering
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics