The 9 wt% Cr ferritic-martensitic steels with alloying additions of Mo, V and Nb have
been widely used in the power generation industry for many years. The high
temperature strength and creep resistance of the advanced high chromium steels
come from the microstructure, which typically contains a tempered martensite matrix
with a fine dispersion of secondary particles. However, the dislocation density and
the type, size and distribution of second phase particles in the microstructure are
functions of the applied heat treatments. The mechanical properties of these steels,
in turn, can be very sensitive to the microstructure during high temperature service
life and therefore it is important to understand both the microstructural evolution and
mechanical properties of these steels as a function of service life. [Continues.]
Funding
TSB
History
School
Aeronautical, Automotive, Chemical and Materials Engineering