Effect of carbon on the grain boundary segregation of phosphorus in α-iron
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Cited by (104)
Grain boundary segregation and toughness of friction-stir-welded high-phosphorus weathering steel
2022, Materials Science and Engineering: ACitation Excerpt :Contrary to the above discussion, the grain boundary segregation of P in the SZ formed below A1 was larger than that in the SZ formed above A3, as shown in Figs. 5 and 6. This is presumed to stem from the site competition effect between P and C [18,19] because C segregated at the grain boundary would have prevented P segregation in the coarse grains in the SZ formed above A3. Moreover, the fast diffusion of P assisted by the lattice defects in dynamically recrystallized grains in the SZ formed below A1 is another possible reason.
First-principles study on the P-induced embrittlement and de-embrittling effect of B and C in ferritic steels
2021, Acta MaterialiaCitation Excerpt :In particular, it has been found experimentally that B and C can mitigate the P-induced embrittlement [8,12–15]. The ‘de-embrittling’ effect was attributed to two possible reasons [12], the inherent effect of the strengthening alloying elements [12–14] or the decreased P segregation caused by them [15]. The intrinsic beneficial effect of B and C on GB cohesion has been well established [4,10] while the second mechanism seems to be supported by several studies based on Auger electron spectroscopy (AES) [8,14–16].
Evolution of boron segregation during tempering in B doped 9%Cr ferritic steel
2021, Materials CharacterizationRelationship between solidification sequence and toughness of carbon steel weld metal
2020, Materials CharacterizationCitation Excerpt :Notably, impurity elements, such as sulfur and phosphorous, segregate at the prior austenite grain boundary in the weld metal and cause intergranular embrittlement and a significant deterioration of the toughness [1–3]. This segregation is a superposition of segregation during solidification [4–7] and intergranular segregation during cooling after solidification [8–10]. Moreover, the impurity elements tend to segregate because of a low partition coefficient during solidification [11–14].
Competitive grain boundary segregation of phosphorus and carbon governs delamination crack in a ferritic steel
2018, Materials CharacterizationCitation Excerpt :steel (Fig. 7b), large amounts of phosphorus atoms are segregated at the GBs. Previous study revealed that as the temperature increases, the segregation trend of phosphorus increases and that of carbon decreases because phosphorus has a lower segregation energy (50 kJ/mol) compared to carbon (80 kJ/mol), as explained by the site competition model [31]. Therefore, maintaining high temperature for a long time can induce a higher phosphorus segregation at the GBs.
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Graduate Student, Graduate School of Engineering, Tohoku University; Now at R and D Center (Metals and Ceramic Lab.), Toshiba Co., Kawasaki, Japan