Bevis Hutchinson

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Keywords: Heat affected zone Toughness Bainite Inter-variant plane distribution EBSD a b s t r a c t Microstructures and Charpy impact properties have been examined in two microalloyed steels following heat treatments to simulate weld heat affected zone (HAZ) structures over a range of heat input conditions, characterised by the cooling time from 800 to 500(More)
An unexpected peak in attenuation has been observed at ∼800°C when heating low carbon steels in a laser-ultrasonic instrument. An explanation is given in terms of enhanced crystalline anisotropy with increasing temperature in the bcc ferrite range combined with subsequent transformation to austenite at still higher temperatures. An analysis based on(More)
Most metal production involves changes in microstructure by recrystallisation and grain growth but these events cannot normally be recorded in real time. Laser ultrasonics (LUS) provides an exceptional possibility. Wave velocity is affected by recrystallisation due to changes in texture, while grain size affects directly attenuation of the signal. This(More)
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