HYDROGEN IN TITANIUM-ALUMINUM ALLOYS

Journal Article · Fri Aug 01 04:00:00 EDT 1958 · Trans. Met. Soc. AIME

OSTI ID:4302494

Berger, L W; Williams, D N; Jaffee, R I

The effects of hydrogen on the properties of binary Ti-Al alloys cortaining 2.5, 5, and 7% aluminum and arnary alloys of the same compositions with added interstitial elements oxygen, nitrogen, and carbon were studied. Aluminum increases the apparent hydrogen solubility of the alpha -phase, resulting in a mankind increase in resistance to impact embrittlement. In the Ti -5Al and Ti-7Al alloys, for example, the addition of 180 and 305 ppm hydrogen, respectively, did not cause embrittlement, while unalloyed titanisum was embrittled by as little as 75 ppm. The role of aluminum in increasing hydrogen solubility of the alpha -phase probably accounts for the excellent hydrogen tolerance of alpha - BETA alloys containing considerable amounts of aluminum. There is some evidence that aluminum retards the rate of hydride precipitation. If so, these alloys may be susceptible to slow-strain embrittlement. (auth)

• Research Organization: Battelle Memorial Inst., Columbus, Ohio
• NSA Number: NSA-12-017260
• OSTI ID: 4302494
• Journal Information: Trans. Met. Soc. AIME, Journal Name: Trans. Met. Soc. AIME Vol. Vol: 212
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM
ALUMINUM ALLOYS
BRITTLENESS
CARBON
DEFECTS
DEFORMATION
HYDRIDES
HYDROGEN
INTERSTITIALS
LATTICES
MINERALOGY, METALLURGY, AND CERAMICS
NITROGEN
OXYGEN
PRECIPITATION
SOLUBILITY
STABILITY
TITANIUM ALLOYS