Environmental embrittlement in Ni3Al+B

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(92)90632-O· OSTI ID:5528859

Wan, X J; Zhu, J H; Jing, K L ^[1]

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1. Shanghai University of Technology, (China)

Ni3Al alloys with a low boron content (120 wt ppm) are shown to be susceptible to environmental embrittlement in the presence of water vapor. When the boron content is sufficiently low, hydrogen released from the reaction of water vapor with aluminum atoms can reduce the beneficial plastisizing effect of boron, leading to lower ductility and intergranular cracking. Of the environments studied, gaseous hydrogen is the most harmful for Ni3Al. 19 refs.

• OSTI ID: 5528859
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 26; ISSN SCRME; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
BORON
BORON ADDITIONS
BORON ALLOYS
CHEMICAL REACTIONS
CORROSION
CRYSTAL STRUCTURE
DUCTILITY
ELEMENTS
EMBRITTLEMENT
FLUIDS
FRACTOGRAPHY
GASES
GRAIN BOUNDARIES
HYDROGEN EMBRITTLEMENT
INTERGRANULAR CORROSION
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MICROSTRUCTURE
NICKEL ALLOYS
SEMIMETALS
TENSILE PROPERTIES
VAPORS
WATER VAPOR