Effect of creep stress on the microstructure of 9-12% Cr steel for rotor materials.
High-chromium heat-resistant steel has been widely used as the key material to improve the condition of steam pressure and temperature in the modern high-efficiency power plants. Despite the use of the steel above 550°C for several decades, its major failure is owing to the creep fracture. In this study, the effect of creep stress on the microstructure in 9-12% Cr steel has been investigated microscopically, and it is clarified that the creep stress enhances precipitation of Laves phase and influences the lath width and dislocation density in lath interior.
School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401-331, China.
Jiling
J
Dong
Yinsheng
Y
He
Minsoo
M
Kim
Keesam
K
Shin