Microstructure and Mechanical Properties of Intercritically Treated Grade 91 Steel. [PDF]
Materials (Basel), 2020 Premature creep failures at the intercritical heat affected zone (ICHAZ) of creep-resistant steel weldments have been frequently reported. However, the creep degradation mechanism of different microstructure constituents in ICHAZ is complicated and needs further clarification.
Wang Y, Zhang W, Lim YC, Wang Y, Feng Z.
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Small punch tensile/fracture test data and 3D specimen surface data on Grade 91 ferritic/martensitic steel from cryogenic to room temperature [PDF]
Data in Brief, 2016 Raw data from small punch tensile/fracture tests at two displacement rates in the temperature range from −196 °C to room temperature on Grade 91 ferritic/martensitic steel are presented. A number of specimens were analyzed after testing by means of X-ray
Matthias Bruchhausen +3 more
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Microstructural characterization and creep response of Gleeble-simulated heat-affected zone of electron beam welded Grade 91 steel [PDF]
Scientific ReportsThe manuscript presents microstructure and creep behavior of Gleeble-simulated heat-affected zones (HAZs) representative of electron beam (EB)-welded Grade 91 steel joints.
J. Vanaja +5 more
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A Phenomenological Model for Creep and Creep-Fatigue Crack Growth Rate Behavior in Ferritic Steels
Metals, 2023 A model to rationalize the effects of test temperature and microstructural variables on the creep crack growth (CCG) and creep-fatigue crack growth (CFCG) rates in ferritic steels is described. The model predicts that as the average spacing between grain
Ashok Saxena
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Metallurgical Risk Factors in Grade 91 Steel [PDF]
Advances in Materials Technology for Power Plants, 2019 Abstract Modified 9Cr-1Mo steel (ASTM Gr.91) is widely used in components of fossil fueled power plants around the world today. This grade of steel has however been shown to exhibit significant variations in creep life and creep ductility, which has led to premature in-service failures.
Jabar, Sharhid +3 more
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Insight into Type IV cracking in Grade 91 steel weldments
Materials & Design, 2020 In this work, an insight into the premature Type IV cracking was undertaken to clarify its mechanisms in Grade 91 steel pipe weldments. High-resolution microscopy observations of the as-welded heat-affected zone (HAZ) reveal that the commonly recognized ...
Yiyu Wang, Rangasayee Kannan, Leijun Li
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Cailiao gongcheng, 2021 The creep rupture strength data of Grade 91 steel specimens with various hardness values were used to study the correlation of hardness with creep rupture strengths and maximum allowable stresses of the steel. The results show that creep rupture tests at
PENG Zhi-fang +4 more
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Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment
Nuclear Engineering and Technology, 2021 This study investigated the creep and creep crack growth (CCG) behavior of the base metal (BM), weld metal (WM), and heat affected zone (HAZ) in a Gr. 91 weldment, which was made by a shield metal arc weld process.
Woo-Gon Kim +4 more
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Mechanical properties of heat resistant steel serviced for 30 months [PDF]
E3S Web of Conferences, 2021 Grade 91 steel pipe was replaced after about 30 months of service. In this paper, the tensile properties, microhardness and chemical composition of the pipeline steel are systematically tested and analyzed.
Ren Facai, Xu Jinsha, Tu Zhiqiu, Si Jun
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Electromagnetic evaluation of the microstructure of Grade 91 tubes/pipes [PDF]
International Journal of Pressure Vessels and Piping, 2015 AbstractThis paper assesses the feasibility of transferring a laboratory-based electromagnetic (EM) sensor technique, which has already proved sensitive to significant (e.g. phase balance) or subtle (e.g. number density of fine precipitates) microstructural changes in steel, to non-destructive evaluation of the microstructure of power generation ...
Liu, Jun +5 more
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