Flow behaviour and constitutive modelling of Grade 91 steel base and weld at elevated temperatures

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Flow behaviour of Grade 91 steel base and weld was accurately described by the Voce model at multiple temperatures.
At 550°C, the Voce model's predictions of yield strength and ultimate tensile strength closely matched experimental findings.
Tensile tests were conducted using specimens from the base material and welds post heat treatment at 760°C for 3 hours.
The study highlights that temperature influences void size in weld metals significantly, emphasizing temperature effects.

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Experimental analysis illustrates flow behaviour and tensile properties of Grade 91 steel and weld metal, indicating the Voce model's accuracy.

Singh et al. (2025) studied this question.

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Experimental analysis illustrates flow behaviour and tensile properties of Grade 91 steel and weld metal, indicating the Voce model's accuracy.