Metallurgical Origins of Fracture Toughness and Microstructure and Fracture Toughness of an HSLA (High-Strength/Low-Alloy) Steel.

Abstract

The report discusses effects of composition and heat treatment on the fracture behavior of a group of steels based on ASTM A712A. Very low transition temperatures were observed in a number of cases. However, adverse effects of Cu on the K sub Ic value for cleavage and on the sharpness of the ductile/brittle transition are noted. At ambient temperatures, overaged Cu particles are beneficial for ductile fracture resistance. A new experimental method of evaluating the relative contributions of opening and shear to ductile crack growth was developed, along with a superdislocation model of the process. Keywords: Steel, high-strength/low alloy; Microstructural effects; Compositional effects; Fracture statistics; Constitutive Modelling.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 31, 1985
Accession Number
ADA155530

Entities

People

  • A. R. Rosenfield
  • J. G. Schroth
  • J. P. Hirth

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Alloys
  • Data Science
  • Engineering
  • Fracture (Mechanics)
  • Heat Treatment
  • Information Science
  • Integrals
  • J Integrals
  • Low Alloy Steels
  • Materials
  • Mechanics
  • Microstructure
  • Physical Metallurgy
  • Resistance
  • Statistical Analysis
  • Transition Temperature
  • Transitions

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy