STRUCTURAL CHANGES IN HIGH-STRENGTH STEEL ASSOCIATED WITH STRESS CORROSION AND ITS RELATIONSHIP TO DELAYED FAILURE.

Abstract

Microscopic and crystal-structure examinations have been made on AISI 4340 steel heat treated to four strength levels, to provide a basis for investigating changes in these materials during stress-corrosion cracking and hydrogen embrittlement. Preliminary studies on stress-corrosion fracture surface reveal two, and possibly three, morphological characteristics that coincide with specific areas in the fracture. Metal-hydrogen reactions that have been studied suggest different behavior for martensite and ferrite. The net result of the metal-hydrogen reaction was found to be an induced compressive stress in the surface. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 27, 1965
Accession Number
AD0462843

Entities

People

  • A. B. Tripler
  • C. M. Schwartz
  • D. A. Vaughan
  • D. I. Phalen
  • W. K. Boyd

Organizations

  • Battelle Memorial Institute

Tags

DTIC Thesaurus Topics

  • Corrosion
  • Crystal Structure
  • Embrittlement
  • Ferrium
  • Hydrogen
  • Hydrogen Embrittlement
  • Material Degradation Processes
  • Materials
  • Steel
  • Stress Corrosion
  • Stress Corrosion Cracking

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.