Hydride formation in two-phase (Ti[sub 3]Al + TiAl) titanium aluminides by cathodic charging

Journal Article · Tue Jun 15 04:00:00 EDT 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90579-H· OSTI ID:6583593

Takasaki, Akito; Ojima, Kozo; Taneda, Youji ^[1]

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1. National Defense Academy, Yokosuka (Japan)

Titanium aluminides have attractive properties at elevated temperatures. Recently, considerable effort has been directed toward determining the hydrogen susceptibility of Ti[sub 3]Al ([alpha][sub 2]) and TiAl ([gamma]) intermetallic compounds. It is known that the [alpha]-titanium, which is the low temperature phase of pure titanium, has a very low solubility for hydrogen and precipitates a hydride when the solubility limit is reached. From this aspect, the [alpha][sub 2] phase, whose titanium content is much more than that of the [gamma] phase, is considered to precipitate a hydride easily. This means that hydrogen embrittlement in [alpha][sub 2] based alloys occurs more easily than in [gamma] based alloys. There have been a number of recent reports on hydride in [alpha][sub 2] or [gamma] based alloys, but less in two-phase ([alpha][sub 2] + [gamma]) alloys. This report presents a preliminary result of the effect of hydrogen charging on the microstructures in two-phase ([alpha][sub 2] + [gamma]) titanium aluminides by cathodic charging.

• OSTI ID: 6583593
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 28:12; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CRACKS
CRYSTAL STRUCTURE
DATA
ELEMENTS
EMBRITTLEMENT
EXPERIMENTAL DATA
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN EMBRITTLEMENT
INFORMATION
INTERMETALLIC COMPOUNDS
MICROSTRUCTURE
NONMETALS
NUMERICAL DATA
PRECIPITATION
SEPARATION PROCESSES
SOLUBILITY
TITANIUM ALLOYS