ENVIRONMENTAL CRACKING IN AISI 4340 STEEL.

Abstract

Knowledge of the subcritical flaw growth characteristics of the material under the expected service conditions is an important part of any fracture control plan. The prime causes of subcritical flaw growth are fatigue, adverse environment, or both. Fatigue loading will cause crack growth in all metals while adverse environments may or may not. In some steels a moist air environment is of severe enough nature to cause substantial subcritical flaw growth. For the materials engineer working in the area of fracture control, all flaw growth due to environment has become known as stress corrosion cracking although the mechanism in many cases is probably not one of corrosion. Therefore, in this paper the term environmental cracking will be used when referring to cracking caused by adverse environments. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1968
Accession Number
AD0669255

Entities

People

  • W. A. Van Der Sluys

Organizations

  • University of Illinois Urbana–Champaign

Tags

DTIC Thesaurus Topics

  • Advanced Materials
  • Biomedical And Dental Materials
  • Corrosion
  • Cracks
  • Engineers
  • Environment
  • Material Degradation Processes
  • Materials
  • Materials Engineering
  • Materials Science
  • Stress Corrosion
  • Stress Corrosion Cracking

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.
  • Systems Analysis and Design