Moisture-Induced Environmental Embrittlement of Ordered Intermetallic Alloys at Ambient Temperatures

Liu, C. T.

doi:10.1007/978-94-011-2534-5_21

Moisture-Induced Environmental Embrittlement of Ordered Intermetallic Alloys at Ambient Temperatures

Conference · Sun Jun 23 00:00:00 EDT 1991 · Ordered Intermetallics — Physical Metallurgy and Mechanical Behaviour

DOI:https://doi.org/10.1007/978-94-011-2534-5_21· OSTI ID:5279596

Liu, C. T. ^[1]

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Recent studies have demonstrated that moisture-induced environmental embrittlement is a major cause of low ductility and brittle fracture in ordered intermetallics with high crystal symmetries (e.g. L1₂ and B2). The embrittlement involves the reaction of reactive elements in intermetallics with moisture in air and the generation of atomic hydrogen at crack tips. The loss in ductility at ambient temperatures is generally accompanied by a change in fracture mode from ductile appearance to brittle grain-boundary fracture in many L1₂ intermetallics, and to brittle cleavage in body-centered cubic (bcc)-ordered intermetallics. In a number of cases, the embrittlement was alleviated by alloy design through control of microstructure and alloy composition.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

DOE Contract Number:: AC05-84OR21400

OSTI ID:: 5279596

Report Number(s):: CONF-9106275--1; ON: DE91018852; ISBN: 978-94-010-5119-4

Journal Information:: Ordered Intermetallics — Physical Metallurgy and Mechanical Behaviour, Journal Name: Ordered Intermetallics — Physical Metallurgy and Mechanical Behaviour

Publisher:: Springer

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
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Moisture-Induced Environmental Embrittlement of Ordered Intermetallic Alloys at Ambient Temperatures

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References (30)

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