Implications of Alloy Structure with Respect to Mechanical Properties.

Abstract

The primary objective of this project has been to relate the toughness of metals, including effects of hydrogen, to physical properties at the atomic level. The approach is based on computer-simulation techniques that describe a crack-containing crystal comprised of the order to a thousand atoms. During this reporting period, research was carried out in the following areas: (1) construction of a physically realistic model for the atomic arrangement around a crack tip, as well as the development of 'flexible boundaries'; (2) selection of an Fe-H interatomic potential together with its application to the simulation of hydrogen assisted crack propagation; and (3) analysis of the effects of lattice periodicity on fracture, including effects due to the presence of hydrogen.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 31, 1977
Accession Number
ADA044614

Entities

People

  • A. J. Markworth
  • G. T. Hahn
  • L. R. Kahn
  • P. C. Gehlen

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computer Simulations
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Crystal Structure
  • Current Source Inverters
  • Energy
  • Heat Of Activation
  • Hydrogen
  • Materials
  • Mechanical Properties
  • Military Research
  • Physical Properties
  • Simulations
  • Surface Energy
  • Three Dimensional

Readers

  • Materials Science (Mechanical Engineering).
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Systems Analysis and Design