The Tempering of Martensite

Abstract

The time-temperature relation for the loss of tetragonality of martensite was determined for a plain carbon steel (.95% C.). The time and temperature are related through a heat of activation relation. This heat of activation is of the order of 34,000 cal./gm. mol. These data indicate that appreciable tempering of the first formed martensite can occur with moderate cooling rates upon quenching if the Mg temperature is significantly above room temperature. Graphs are presented for estimating the amount of tempering, in the steel studied, during any tempering treatment, as well as during quenching.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1945
Accession Number
ADA950514

Entities

People

  • D. C. Buffum
  • J. H. Hollomon
  • L. D. Jaffe

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Angle Of Incidence
  • Cameras
  • Chemical Laboratories
  • Coefficients
  • Diffraction
  • Diffusion
  • Equations
  • Geometry
  • Heat Of Activation
  • Heat Treatment
  • Low Temperature
  • Martensite
  • Materials
  • Measurement
  • Steel
  • Tempering
  • X Rays

Fields of Study

  • Materials science

Readers

  • Combustion and Flow Dynamics.
  • Powder metallurgy of Titanium alloys.