Long-term thermal degradation of narrow gap orbital welded P91 and P92 steels

Junek, Michal; Svobodová, Marie; Janovec, Jiří; Horváth, Jakub; Ducháček, Petr

doi:10.1016/j.ijpvp.2020.104133

Cited by 4 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The authors claimed that after 3000 h of ageing the impact properties were reduced and brittle fracture was increased. Junek et al [22] evaluated the mechanical properties and microstructures of similar and dissimilar welds of martensitic steels P91 and P92 after long-term laboratory ageing at elevated temperatures. The research of mechanical properties of base metals, i.e., steel P91 and P92, had similar results, i.e., insignificantly changes in mechanical properties.…”

Section: Results Of Numerical Fracture Toughness Simulationmentioning

confidence: 99%

Numerical Research of Fracture Toughness of Aged Ferritic-Martensitic Steel

Janulionis

Dundulis

Grybėnas

2020

Metals

View full text Add to dashboard Cite

Generally, material properties such as the modulus of elasticity, yield strength or fracture toughness are determined by conducting an experiment. Sometimes experimental determination cannot be done due to specific experimental conditions, lack of testing material and so on. Also, experiments are time consuming and costly. Therefore, there arises the need for alternative determination methods. A numerical method for the fracture toughness determination of steel P91 is suggested in this paper. For this purpose, the universal finite element software ABAQUS was used. The numerical simulation of the C(T) specimen tension test was carried out using non-linear simulation for a conditional load PQ determination, and linear simulation for fracture toughness value KQ determination. The suggested method is validated by comparing numerical and experimental tests results. The secondary aim of the paper is the evaluation of the ageing effect on the fracture toughness of steel P91. Thermal ageing of the steel was carried out in an electric furnace at 650 °C up to 11,000 h. As the numerical results had a good coincidence with experimental data at room temperature, the prediction of fracture toughness at elevated temperature, i.e., 550 °C, using numerical method was carried out.

show abstract

Section: Results Of Numerical Fracture Toughness Simulationmentioning

confidence: 99%

Numerical Research of Fracture Toughness of Aged Ferritic-Martensitic Steel

Janulionis

Dundulis

Grybėnas

2020

Metals

View full text Add to dashboard Cite

show abstract

Comprehensive Study on Mechanical and Metallurgical Behavior of P-92 Steel

Pratap Singh,

Nand Agrawal,

Bishwakarma

et al. 2024

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

Effect of Microstructure Evolution on the Mechanical Properties of P92 Steel during Long-Term Thermal Aging

Sakthivel

Vasudevan

2023

Materials Performance and Characterization

View full text Add to dashboard Cite

Tensile properties and Charpy impact toughness of P92 steel in the normalized and tempered (NT) and thermal aged (TA) at 923 K for different durations (10,000, 20,000, 30,000, and 54,300 h) were investigated. The yield stress and ultimate tensile strength of the thermal exposed up to 30,000-h steels were (30–24 %) lower than the NT steel over the investigated tests temperature range (298–923 K). The tensile strengths of thermal exposed for different durations up to 30,000-h steels were comparable. The drastic reduction in tensile strengths about 15–20 % was observed in the 54,300-h exposed steel as compared to the 30,000-h aged steel. The Charpy impact toughness of the P92 steel has decreased significantly in the TA condition (37 J) than in the NT condition (142 J). Formation and coarsening of Laves phase by loss of tungsten in the matrix, lower dislocation density, and coarser lath width in the TA steel have been attributed to the deterioration of the tensile strengths of TA steel. Martensitic lath structure was recovered predominantly in the 54,300-h aged steel. Coarsening rate of Laves phase (3.5963 × 10−28 m3/s) is higher than the M23C6 (6.0877 × 10−30 m3/s) precipitates. The presence of coarser Laves phase and reduction in boundary density in the TA steel has resulted in a drastic reduction in the impact toughness of the steel.

show abstract

Long-term thermal degradation of narrow gap orbital welded P91 and P92 steels

Cited by 4 publications

References 9 publications

Numerical Research of Fracture Toughness of Aged Ferritic-Martensitic Steel

Numerical Research of Fracture Toughness of Aged Ferritic-Martensitic Steel

Comprehensive Study on Mechanical and Metallurgical Behavior of P-92 Steel

Effect of Microstructure Evolution on the Mechanical Properties of P92 Steel during Long-Term Thermal Aging

Contact Info

Product

Resources

About