The mechanical properties of α-phase low-carbon Fe-Mn alloys

Segregation engineering enables nanoscale martensite to austenite phase transformation at grain boundaries: A pathway to ductile martensite

“…A kinetic analysis of the segregation rate of Mn at 450°C was consistent with bulk diffusion of these elements in ferrite and resulting segregation. Further similar results on Mn segregation to grain boundaries has been reported in other studies [59][60][61][62][63][64][65][66][67]. Differences among the various results are due to the different alloys and the corresponding chemical potentials for Mn and also due to site competition effects.…”

Precipitation hardening of biodegradable Fe–Mn–Pd alloys

“…In the SHT state the Fe-10Mn-1Pd alloy consists of a single phase (a 0 -martensite), exhibiting the same typical lath-shape martensite microstructure as reported for binary Fe-10Mn alloys [12,32,33]. This confirms that Pd does not affect the SHT microstructure.…”

Grain boundary segregation engineering and austenite reversion turn embrittlement into toughness: Example of a 9 wt.% medium Mn steel

“…It has been observed that the addition of Mn shifts the ductile to brittle transition temperature (DBTT) towards higher temperatures [7]. It was assumed that the higher Mn content enhanced the effect of harmful impurities [6,8]. Different solutions were suggested to lower the DBTT in medium Mn steels, e.g.…”

“…Among the possible explanations for the embrittlement in medium Mn alloys, the segregation of both P and N [2] or N alone [5] have been suggested to reduce grain boundary cohesion. Bolton et al [6] speculated that the Mn/Si ratio controls the susceptibility to temper embrittlement. In their study, however, the role of N and C remained unclear.…”