Influence of Nonmartensitic Transformation Products on Mechanical Properties of Tempered Martensite

Abstract

The influence of nonmartensitic transformation products on the mechanical properties of tempered martensite is presented for samples of an SAE 4340 steel, partially isothermally transformed to specific high-temperature transformation products and quenched and tempered to hardness values of from 25 to 40 Rockwell C. The effects of upper bainite in amounts of 1, 5, 10, 20, and 50 percent, of 5 percent ferrite, and of 5 percent pearlite on the tensile, impact, and fatigue properties are evaluated.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1952
Accession Number
ADA377090

Entities

People

  • J. W. Hodge
  • W. T. Lankford

Organizations

  • National Aeronautics and Space Administration

Tags

DTIC Thesaurus Topics

  • Fatigue Tests (Mechanics)
  • Great Lakes
  • Hardness
  • Heat Treatment
  • High Temperature
  • Illinois
  • Impact Strength
  • Martensite
  • Mechanical Properties
  • Microstructure
  • Reduction Of Area
  • Steel
  • Tensile Properties
  • Tensile Strength
  • Toughness
  • United States
  • Yield Strength

Readers

  • Powder metallurgy of Titanium alloys.