Hydrogen effect on the deformation and fracture behaviors of a Ni3Al+B alloy

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)90633-P· OSTI ID:5579092

Wan, X J; Zhu, J H; Jing, K L ^[1]

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1. Shanghai University of Technology, (China)

The mechanism of hydrogen embrittlement in a Ni3Al alloy containing boron was investigated experimentally by observing hydrogen-charged and hydrogen-free specimens in a scanning electron microscope. It is found that both grain boundary decohesion and high stress concentrations contribute to hydrogen-assisted intergranular cracking of this alloy. Hydrogen counteracts the beneficial effect of boron, while high stress concentrations induce crack nucleation and propagation along the hydrogen-weakened grain boundaries. 15 refs.

• OSTI ID: 5579092
• 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
GRAIN BOUNDARIES
HYDROGEN EMBRITTLEMENT
INTERGRANULAR CORROSION
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MICROSTRUCTURE
NICKEL ALLOYS
SEMIMETALS
TENSILE PROPERTIES