Microstructure evolution analysis on creep behavior of Grade 91 steel under multiaxial state of stress

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Ren, Facai^1 ; Tang, Xiaoying^1 ; Li, Bo^2

Shanghai Institute of Special Equipment Inspection and Technical Research, Shanghai

200062, China^1

School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai

200237, China^2

关键词: Applied stress;    Creep behaviors;    Grade 91 steel;    Heat resistant;    Micro-structure evolutions;    Multi-axial state of stress;    Scanning electrons;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/2/022013/pdf
DOI  :  10.1088/1755-1315/233/2/022013

来源: IOP

【 摘 要 】

Creep tests of Grade 91 heat-resistant martensitic steel under multiaxial state of stress were conducted at 923K with stress ranging from 125 to 200MPa. The test results showed that the creep time of Grade 91 steel increases with the decreasing of applied stress. The microstructure evolution during creep of Grade 91 heat-resistant martensitic steel was investigated based on the optical microscope and scanning electron microscope analysis.