Metallurgical and Materials Transactions B

, Volume 3, Issue 11, pp 2905–2909 | Cite as

Hydrogen in β transformed Ti-6Al-4V

  • G. F. Pittinato
  • W. D. Hanna
Physical Chemistry


The internal reactions associated with hydrogen absorbed at ambient temperature by Ti-6A1-4V having a transformedβ microstructure were determined by using X-ray diffraction analysis. Below 650 ppm, the absorbed hydrogen was concentrated primarily in theβ phase causing an increase in the d(200) spacing and considerable X-ray line broadening. The a phase, however, was not significantly affected by the absorbed hydrogen showing no change in the d(1120) and d(1012) spacings and only a finite amount of line broadening. At approximately 650 ppm H, hydride precipitation began at thea-β interface. With increasing hydrogen content, theβ phase d(200) spacing continued to increase, the (200) X-ray line broadening reached a limiting value, and massive hydrides were formed. The data indicates that low concentrations of hydrogen absorbed by a-β titanium alloys can be detected by examining the X-ray line profile of theβ phase.


Hydride Hydrogen Content Metallurgical Transaction Volume Titanium Hydride Hydride Formation 
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Copyright information

© The Metallurgical of Society of AIME 1972

Authors and Affiliations

  • G. F. Pittinato
    • 1
  • W. D. Hanna
    • 2
  1. 1.McDonnell Douglas Astronautics Co.Space Systems CenterHuntington Beach
  2. 2.Aerospace Corp.El Segundo

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