TY - GEN
T1 - Hydrogen behavior in GTA welded Ti-6Al-4V and beta-21S aerospace applicative titanium alloys
AU - Tal-Gutelmacher, E.
AU - Eliezer, D.
AU - Boellinghaus, T.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Ti-6A1-4V and β-21S (Ti-15Mo-3Al-3Nb-0.3Si, wt%) titanium alloys were exposed to a hydrogen-containing environment, introduced by Gas-Tungsten Arc welding via a mixed Ar + 5% H2 shielding gas. The different characteristics of hydrogen absortion/desorption behavior and trapping in the welded Ti-6Al-4V and β-21S alloys were studied by means of thermal desorption spectroscopy (TDS). Thermal spectra analysis is supported by data from a variety of other experimental techniques, e.g., Leco hydrogen determinator and microstructure investigations. In the specimens welded in hydrogen-containing environment, no cracking was observed. However, the complex process of hydrogen desorption was found to be significantly affected by the microstructure developed in the alloys after welding. The unique microstructural morphology, the presence of potential irreversible trapping sites and phase transitions (oxide dissociation) were considered to be the potential parameters affecting the hydrogen desorption behavior from the alloys.
AB - Ti-6A1-4V and β-21S (Ti-15Mo-3Al-3Nb-0.3Si, wt%) titanium alloys were exposed to a hydrogen-containing environment, introduced by Gas-Tungsten Arc welding via a mixed Ar + 5% H2 shielding gas. The different characteristics of hydrogen absortion/desorption behavior and trapping in the welded Ti-6Al-4V and β-21S alloys were studied by means of thermal desorption spectroscopy (TDS). Thermal spectra analysis is supported by data from a variety of other experimental techniques, e.g., Leco hydrogen determinator and microstructure investigations. In the specimens welded in hydrogen-containing environment, no cracking was observed. However, the complex process of hydrogen desorption was found to be significantly affected by the microstructure developed in the alloys after welding. The unique microstructural morphology, the presence of potential irreversible trapping sites and phase transitions (oxide dissociation) were considered to be the potential parameters affecting the hydrogen desorption behavior from the alloys.
KW - Hydrogen desorption
KW - Hydrogen embrittlement
KW - Ti-6Al-4V
KW - Titanium alloys
KW - β-21S
UR - http://www.scopus.com/inward/record.url?scp=38349143665&partnerID=8YFLogxK
U2 - 10.4028/0-87849-432-4.1413
DO - 10.4028/0-87849-432-4.1413
M3 - Conference contribution
AN - SCOPUS:38349143665
SN - 0878494324
SN - 9780878494323
T3 - Materials Science Forum
SP - 1413
EP - 1420
BT - Progress in Light Metals, Aerospace Materials and Superconductors
PB - Trans Tech Publications Ltd
T2 - 2006 Beijing International Materials Week, 2006 BIMW -International Conference on Aerospace Materials, ICAM 2006
Y2 - 25 June 2006 through 30 June 2006
ER -