Results 1 to 10 of about 10,643 (143)
Effect of Heat Treatment on Microstructure and Hardness of Grade 91 Steel [PDF]
Metals, 2015 Grade 91 steel (modified 9Cr-1Mo steel) is considered a prospective material for the Next Generation Nuclear Power Plant for application in reactor pressure vessels at temperatures of up to 650 °C.
Triratna Shrestha +4 more
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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.
europepmc +4 more sources
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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Creep rupture behavior of welded Grade 91 steel [PDF]
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2016 Abstract Creep rupture behavior of fusion welded Grade 91 steel was studied in the temperature range of 600 – 700 °C and at stresses of 50–200 MPa. The creep data were analyzed in terms of the Monkman-Grant relation and Larson-Miller parameter. The creep damage tolerance factor was used to identify the origin of creep damage.
Triratna Shrestha, Mehdi Basirat
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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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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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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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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
doaj +1 more source
An Investigation of Creep Resistance in Grade 91 Steel through Computational Thermodynamics
Engineering, 2020 This study was conducted to understand the relationship between various critical temperatures and the stability of the secondary phases inside the heat-affected-zone (HAZ) of welded Grade 91 (Gr.91) steel parts.
Andrew Smith +4 more
doaj +1 more source