Observing Liquid Metal Embrittlement Cracks In Couple Systems
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About The Author

Thierry Auger is a research scientist at French National Centre for Scientific Research. His research focues on Material Characterization, Mechanical Properties, Mechanical Behavior of Materials, Microstructure, Metals, and Heat Treatment

                       

Observing Liquid Metal Embrittlement Cracks In Couple Systems

Bring a couple system such as brass, a copper-zinc alloy, in contact with a liquid metal — say, mercury. Mechanically stretch brass with a tensile machine past its yield point (the stress at which the alloy irreversibly plastically yield), and a brittle crack will suddenly initiate and propagate at a fast speed of the order of ten centimeters per second. This rupture, triggered by the liquid metal, occurs in an otherwise ductile alloy. Such process, which can lead to catastrophic...

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