Phosphorus segregation and intergranular embrittlement in 2.25Cr1Mo steel
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ABSTRACT: Phosphorus segregation at prior austenite grain boundaries (PAGBs) in 2.25Cr1Mo steel with different degrees of embrittlement has been investigated using X-ray spectroscopy in a field emission gun scanning transmission electron microscope (FEGSTEM). The results indicate that P concentration at P AGBs increases with ageing time, which agrees well with the prediction of McLean's equilibrium segregation model.