Micromechanisms of Fracture and Crack Arrest in Two High Strength Steels.

Abstract

An investigation of fracture properties of a quenched and tempered martensitic steel and copper precipitation on strengthened low carbon ferritic steel possessing similar yield strengths was conducted. The objective included evaluation of fracture toughness, and explanation of metallurgical mechanisms causing changes in relative fracture performance. A crack arrest toughness test procedure was developed to obtain full plate thickness, lower bound measurements of dynamic fracture toughness at various test temperatures. Micromechanisms of fracture processes were described using metallurgical analysis techniques. Keywords: crack arrest, crack initiation, cleavage fracture, and structural steel.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1987
Accession Number
ADA181324

Entities

People

  • David W Taylor
  • J. P. Gudas

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Crystal Structure
  • Iron
  • Materials
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Solid Solutions
  • Stress Strain Relations
  • Stress Waves
  • Tensile Properties
  • Test And Evaluation
  • Test Methods
  • Transition Temperature
  • Yield Strength

Fields of Study

  • Engineering

Readers

  • Powder metallurgy of Titanium alloys.
  • Structural Health Monitoring of Composite Structures.