Direct evidence of hydrogen generation from the reaction of water with FeAl

Journal Article · Sun Dec 15 04:00:00 EST 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(96)00316-8· OSTI ID:413251

Zhu, Y F; Liu, C T; Chen, C H ^[1]

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1. Oak Ridge National Lab., TN (United States)

One of the most important findings in the recent study of deformation and fracture in ordered intermetallics is that many intermetallic alloys with high crystal symmetries (such as L1{sub 2} and B2) are intrinsically quite ductile at ambient temperatures, and that their commonly observed low ductility and brittle fracture are caused mainly by extrinsic factors. Environmental embrittlement has been identified as a major extrinsic factor that embrittles many intermetallic alloys. In this case, the alloys showed brittle fracture and low ductilities when tested in moist air, but they exhibited distinctly high ductilities when tested in high-vacuum or dry-oxygen environments. In order to have a mechanistic understanding of moisture-induced hydrogen embrittlement, it is essential to have a direct measurement of trapped hydrogen atoms with position resolution. In this study, the authors try to develop a laser desorption mass spectrometric method to measure hydrogen atoms in a position-sensitive way. They also compare the amount of trapped hydrogen, with and without exposure to water, for FeAl containing 35.8 at. % Al.

• DOE Contract Number: AC05-96OR22464
• OSTI ID: 413251
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 12 Vol. 35; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
DESORPTION
DUCTILITY
HEAT TREATMENTS
HYDROGEN EMBRITTLEMENT
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MASS SPECTROSCOPY
MELTING
MOISTURE
NEODYMIUM LASERS
ROLLING
SAMPLE PREPARATION