Martensite formation in Fe–9Cr alloys exposed to low carbon activity gas

Nguyen, Thuan Dinh; Zhang, Jianqiang; Young, David J.

doi:10.1016/j.scriptamat.2013.03.023

Martensite formation in Fe–9Cr alloys exposed to low carbon activity gas

Model Fe–9Cr alloys were exposed to Ar–20CO 2 at 799 and 818 °C, then quenched in argon. Binary Fe–9Cr formed Cr-rich carbides at 799 °C and a mixture of carbide, ferrite and martensite after reaction at 818 °C. Addition of 2 wt.% Mn to Fe–9Cr led to 100% martensite formation after carburization …