TRANSFORMATIONS IN IRON-NICKEL ALLOYS,

Abstract

Cooling curves of Fe-Ni alloys (1-10%Ni) quenched at rates up to 60 000 degC/s, reveal two transformation mechanisms: the lower-temperature mechanism is shown, by the criterion of shape change, to be martensitic. The measured M(s) temperatures do not agree with the experiments or calculations of previous investigators. In all but the 10% alloy, the higher-temperature transformation (believed to be the 'massive' transformation) occurs about 50 degC above M(s). The critical cooling rate to produce a martensitic product decreases from about 30 000 degC/s in the 1%Ni alloy to 15 000 degC/s in the 7% alloy. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 16, 1963
Accession Number
AD0618121

Entities

People

  • J. Gordon Parr
  • W. D. Swanson

Tags

DTIC Thesaurus Topics

  • Alloys
  • Chemical Compounds
  • Chemistry
  • Cooperation
  • Elements
  • Group 10 Elements
  • Metallurgy
  • Metals
  • Nickel
  • Nickel Alloys
  • Transition Metals

Readers

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