Aspects of Stress Corrosion

Abstract

The objective of this research was to develop a new approach to stress corrosion and the attendant cracking that accompanies it. The rate of formation of a surface notch in a single crystal material has been theoretically evaluated using first order perturbation theory and shown to depend upon the eighth power of the macroscopic stress for both surface diffusion, volume diffusion and dissolution mechanisms. An experimental study of S.C.C. of austenitic stainless steels in hot halide environments has revealed the presence of martensite on the fracture surfaces whereas it does not form in the bulk at that temperature. This suggests that martensite assists in the kinetics of crack propagation in these environments. The change of work function of copper single crystals by both elastic and plastic compressive strain has been determined. The plastic strain effect is not consistent with theory.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1974
Accession Number
ADA003740

Entities

People

  • William A. Tiller

Organizations

  • Stanford University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Chromium Alloys
  • Corrosion
  • Crack Propagation
  • Crack Tips
  • Crystals
  • Diffusion
  • Environment
  • Hydrogen Embrittlement
  • Materials
  • Perturbation Theory
  • Rate Of Formation
  • Single Crystals
  • Stainless Steel
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Work Functions

Readers

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