Role of molybdenum in phosphorus-induced temper embrittlement of 12%Cr martensitic stainless steel

Segregation-induced changes in grain boundary cohesion and embrittlement in binary alloys

“…7 contains alloys that, if solute were present at the grain boundary, would tend to strengthen grain boundary cohesion rather than weaken it. An example of an anti-segregating pair is Fe alloyed with Mo .001), which is used in steels to prevent the segregation of P to grain boundaries due to favorable interactions in the bulk [52,53]. This prediction arises naturally from our model, but we note that it is different from previous analyses of GB cohesion, which generally predict Mo to strengthen Fe grain boundaries [49].…”

Swelling and radiation-induced segregation in austentic alloys

“…Therefore, the addition of Mo and P must alter the relative diffusion rates of iron, chromium, and nickel to reduce the segregation. Both chromium and phosphorous, and molybdenum and phosphorous are known to have attractive potentials [32]. The addition of phosphorus, which enriches at the boundary, may act as a pin for chromium and molybdenum, thus reducing the depletion.…”

Embrittlement susceptibility induced by impurities segregation to grain boundaries in martensitic steels candidates to be used in ADS

“…In the literature chromium enrichment has been reported in martensitic steels in the annealed and tempered condition and also in these materials with ageing heat treatments [2][3][4][5][6][7][8][9][10]. This chromium enrichment was attributed to segregation in some cases and to the presence of chromium carbides in other studies.…”