Research on Martensitic Transformations in Iron Alloys.

Abstract

Ordering of nearly stoichiometric Fe-25 at.% Pt alloys causes a progressive change in the martensitic transformation from a nonthermoelastic to a thermoelastic type. Accompanying this are several pronounced property changes such as the development of martensite tetragonality and the shape memory effect, reduction of transformation hysteresis, morphology changes and a different mode of reverse transformation, a reduction in the martensite shape strain and driving force at the martensite start temperature, and the onset of invar behavior. These various effects are interrelated. In order to obtain a thermoelastic transformation in Fe-Pt alloys, the martensite start temperature must be lower than a certain value.

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Document Details

Document Type
Technical Report
Publication Date
Nov 07, 1977
Accession Number
ADA047940

Entities

People

  • C. M. Wayman

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Austenite
  • Carbon
  • Cell Structure
  • Cells
  • Crystal Twinning
  • Diffraction
  • Dislocations
  • Electron Diffraction
  • Electron Microscopes
  • Electron Microscopy
  • Iron
  • Iron Alloys
  • Martensite
  • Materials
  • Microscopy
  • Precipitation

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.