Microstructure evolution and fracture mechanism of a novel 9Cr tempered martensite ferritic steel during short-term creep

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 707; pp. 466 - 477
• Main Authors: Xiao, Bo, Xu, Lianyong, Zhao, Lei, Jing, Hongyang, Han, Yongdian, Tang, Zhengxin
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 07.11.2017; Elsevier BV
• Subjects: Chemical precipitation; Chromium steels; Creep rate; Creep strength; Creep tests; Deformation mechanisms; Dimpling; Ductile fracture; Dynamic recrystallization; Evolution; Ferritic stainless steels; Fracture mechanics; Fracture mechanism; G115 steel; Grain boundaries; Laves phase; Martensitic stainless steel; Martensitic stainless steels; Microstructure; Microstructure evolution; Necking; Niobium; Precipitates; Tempered martensite; G115 steel; Fracture mechanism; Precipitates; Microstructure evolution

In this work, the microstructure evolution and fracture mechanism of a novel 9% chromium tempered martensite ferritic steel G115 were investigated over the temperature range of 625–675°C using uniaxial creep tests. The creep curves consist of a primary transient stage followed by an apparent seconda...