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

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Ordered Intermetallics — Physical Metallurgy and Mechanical Behaviour

Part of the book series: NATO ASI Series ((NSSE,volume 213))

Abstract

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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© 1992 Springer Science+Business Media Dordrecht

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Liu, C.T. (1992). Moisture-Induced Environmental Embrittlement of Ordered Intermetallic Alloys at Ambient Temperatures. In: Liu, C.T., Cahn, R.W., Sauthoff, G. (eds) Ordered Intermetallics — Physical Metallurgy and Mechanical Behaviour. NATO ASI Series, vol 213. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2534-5_21

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  • DOI: https://doi.org/10.1007/978-94-011-2534-5_21

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-5119-4

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