THERMOMECHANICAL TREATMENTS APPLIED TO ULTRAHIGHSTRENGTH BAINITES.

Abstract

The mechanical properties of H11 and AISI 4350 steels were determined for a series of bainites formed from both deformed and undeformed austenities. These bainites were also subjected to subsequent straining and tempering treatments. Similar thermomechanical treatments involving martensite as the essential transformation product were included for comparison purposes. H11 and 4350 bainites and martensites exhibit a large response to strain-tempering treatments. For both steels, small deformations (up to 3%) produce large strengthening effects. Yields strengths close to 400,000 psi have been obtained by the application of strain-tempering treatments (50% deformation) to both H11 martensite and bainite. Increasing the carbon content in 43XX steels enhances the strengthening response to strain-tempering. The increments in strength developed by deformation processes both before and after transformation to either bainite or martensite are found to be approximately additive when the individual processes are combined. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 15, 1963
Accession Number
AD0424403

Entities

People

  • S. A. Kulin

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Additives (Chemicals)
  • Martensite
  • Mechanical Properties
  • Steel
  • Tempering

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Metallurgy