INTERNAL FRICTION MEASUREMENTS FOR THE ANALYSIS OF HYDROGEN IN STEEL PARTS,

Abstract

Damping versus temperature curves were determined, by means of a torsion pendulum internal friction apparatus, for hydrogen charged cold drawn 4340 steel wire. A relaxation peak, identified as the Hydrogen Cold-Work Peak, was found in the curves between -90C and -70C. A plot of this relaxation peak height versus charging time shows a linear relationship over only a limited range. The low hydrogen concentration levels that can cause hydrogen embrittlement were found to be below the limits of accurate detection by internal friction methods. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1968
Accession Number
AD0672217

Entities

People

  • S. H. A. Begemann

Organizations

  • Boeing Commercial Airplanes

Tags

DTIC Thesaurus Topics

  • Detection
  • Embrittlement
  • Friction
  • Hydrogen
  • Hydrogen Embrittlement
  • Internal Friction
  • Measurement
  • Pendulums

Fields of Study

  • Materials science

Readers

  • Control Systems Engineering.
  • Materials Science and Engineering.
  • Plasma Physics.