Effect of Hydrogen on Internal Friction of Several Ti Alloys.

Abstract

A resonant bar apparatus employing a three-component piezoelectric composite oscillator system was used to make internal friction and modulus measurements in several titanium alloys in the range of 80 to 400K. Emphasis was placed on the alpha plus beta alloy, Ti-6Al-4V, but the study also included pure Ti, Ti-Al alloys (1, 3 and 10 at.%), Ti-6Al-6V-2Sn, Ti-8Al-1Mo-1V and Ti-17.5Mo alloys. The effect of hydrogen impurities on internal friction was investigated, and a Snoek-type relaxation peak was observed in beta-containing alloys. In the case of Ti-6Al-4V, the peak was found at 144K in the kilohertz frequency range with a relaxation strength of 0.0035/at.% hydrogen. The peak was absent in pure Ti, Ti-Al alloys or quenched Ti-6Al-4V alloy, indicating the need of bcc lattice. The peak was also observed using 10MHz pulse-echo internal friction measurements at 195K.

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1975
Accession Number
ADA015546

Entities

People

  • Kanji Ono
  • Norman L. Guiles

Tags

DTIC Thesaurus Topics

  • Alloys
  • California
  • Composite Materials
  • Cooperation
  • Frequency
  • Friction
  • Hydrogen
  • Impurities
  • Internal Friction
  • Materials
  • Measurement
  • Oscillators
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.