Mechanism of Enhanced Toughness in Martensitic Alloys.

Abstract

The objective of this program was to establish the role of heat treatment parameters on the fracture toughness of ultrahigh strength steels. Microstructural examination, plane strain fracture toughness, Charpy and tensile tests were conducted on alloys 4340 and silicon modified 4340. Heat treatments included both direct as well as step quench schedules. Austenitizing temperatures ranged from 870 C to 1200 C, and step quenching temperatures ranged from 250 C to 100 C.

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Document Details

Document Type
Technical Report
Publication Date
Feb 14, 1978
Accession Number
ADA052536

Entities

People

  • W. E. Wood

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Auger Electron Spectroscopy
  • Auger Electrons
  • Chemistry
  • Electron Microscopy
  • Electron Spectroscopy
  • Electrons
  • Emission
  • Failure Mode And Effect Analysis
  • Fungi
  • Grinding Wheels
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Mechanics
  • Spectroscopy
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Metallurgy