The Charpy V-notch test is used to assess a material's toughness, specifically its resistance to brittle fracture at low temperatures. Brittle fracture is a sudden and catastrophic failure mode that can occur in pipelines, especially those operating in cold climates, because steel's ductility (ability to deform without breaking) decreases as temperature decreases. The Charpy test involves striking a standardized specimen of the pipeline steel, which has a V-shaped notch machined into it, with a pendulum. The amount of en....
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