...Proceedings of the ASME 2024 Pressure Vessels & Piping Conference PVP2024 July 28-August 2, 2024, Bellevue, Washington PVP2024-123443 A MULTI-SCALE MINIMUM TIME-TO-FAILURE RELIABILITY MODEL FOR CREEP, CREEP CRACK INITIATION, AND CREEP CRACK GROWTH OF A 2-1/4-CR-1-MO STEEL AT 565 OC AND A BK-7 GLASS...

... irradiated graphite irradiated material properties stiffness creep coefficient of thermal expansion Abstract This paper presents X-energy’s physics-informed irradiated graphite material model. The model captures the key physical phenomena resulting in elastic strain, thermal strain...

... Abstract Creep and metal loss are typical and concomitant damage mechanisms of pressure equipment operated at high temperature. The phenomena influence and compete with one another: the loss of wall thickness acts as a stress-riser, fostering the inelastic strain accumulation due to creep...

... the elastic rules and methods have remained the same since their original development in the mid to late 1900s. The current rules cover several elastic evaluation criteria based on gross inelastic deformation, progressive inelastic deformation, and creep-fatigue damage as well as some limited buckling rules...

... temperature mechanical behavior. This work evaluated the high temperature creep properties of GMA-DED builds constructed with type 316H, 316L, 316LSi, and 16-8-2 stainless steels at 650 °C, 750 °C and 825 °C. The alloy with longest time to rupture for a given stress varied depending on test temperature. Creep...

... capable of withstanding continued operation at temperatures exceeding 1,500°F (815°C). In this study, microstructural characterization and mechanical testing was conducted on in-service exposed HP40-modified material. Creep damage and changes in precipitate structure were characterized using a variety...

... Abstract Creep rupture experiments were conducted at 650°C under different stress conditions (70MPa, 60MPa, 50MPa) on a T92/HR3C welded joint that had been in service for 10 5 hours. Scanning electron microscopy and optical microscopy were used to observe and quantitatively analyze...

... and ERNiCr-3. From the welding simulation, weld residual stress was predicted, and following post weld heat treatment (PWHT) the normal operating conditions were used for the finite element analysis to predict structural reliability. A hyperbolic sine law was adopted for the creep modeling, and creep life...

... the cracking in these embrittled welds. 347H stainless steel weld creep charpy tests toughness cracking 475 °C (885 °F) embrittlement Proceedings of the ASME 2024 Pressure Vessels & Piping Conference PVP2024 July 28-August 2, 2024, Bellevue, Washington PVP2024-123067 FAILURE ANALYSIS...

...). Tensile test ductility was as low as 7–9% elongation. The creep ductility of these welds was found to be rather low. The elongation to stress rupture varied from 0.5 to 0.9%. The Ω factor varied from 382 to 548. However, creep strength was as good as new 347H stainless steel base metal. Average magnetic...

... taking place at the initial days of ageing remain. To address these a new project was launched to give a better understanding of the seal behavior. metal seal ageing creep Proceedings of the ASME 2024 Pressure Vessels & Piping Conference PVP2024 July 28-August 2, 2024, Bellevue, Washington...

...Proceedings of the ASME 2023 Pressure Vessels & Piping Conference PVP2023 July 16-21, 2023, Atlanta, Georgia PVP2023-107524 SUB-SIZED CREEP SPECIMEN TESTING FOR HIGH THROUGHPUT AND POSTIRRADIATION TESTING Michael D. McMurtrey1, Ninad Mohale1 1Idaho National Laboratory, Idaho Falls, ID, USA ABSTRACT...

... Abstract Creep is a classic inelastic-strain accumulation mechanism of pressure components exposed to high temperature. Due to the long-term exposure, the residual life is usually checked accounting for the steady-state creep, namely the dominant regime in terms of contribution...

... Abstract The rules of ASME B&PV Section VIII Code provide (i) allowable tensile stress at elevated temperatures based on time duration of 100,000 hours; (ii) external pressure charts which do not account for reduction of buckling strength due to creep under short or long-term loads...

...Proceedings of the ASME 2023 Pressure Vessels & Piping Conference PVP2023 July 16-21, 2023, Atlanta, Georgia PVP2023-106834 A MULTI-SCALE CREEP, FATIGUE, AND CREEP-FATIGUE INTERACTION MODEL FOR ESTIMATING RELIABILITY OF STEEL COMPONENTS AT ELEVATED TEMPERATURES Jeffrey T. Fong National Institute...

..., in addition to light water reactor design rules of ASME BPVC Section III Division 1 Subsection NB (hereafter ‘ASME-NB’) has been developed. CC-2843 is recently published code case of ASME Section VIII Division 2 based on the ASME-HB procedures with explicit consideration of creep. The evaluation module...

...Proceedings of the ASME 2023 Pressure Vessels & Piping Conference PVP2023 July 16-21, 2023, Atlanta, Georgia PVP2023-106831 A FAILURE-PROBABILITY- AND DAMAGE-STATE-BASED FATIGUE AND CREEP MODEL FOR ESTIMATING RELIABILITY OF STAINLESS STEEL 316L(N) COMPONENTS IN THERMAL FATIGUE Jeffrey T. Fong...

... is affected to the duct directly, the surface of the duct is exposed to the elevated temperature, and it is called a hot spot. The temperature increase of hot spot does not lead to immediate failure, but it causes structural rupture or bulging of the duct due to creep in the long term. When hot spot occurs...

... Abstract A cracking damage was found in 347SS flange neck operated at about 520 deg. C after long term operation. In previous report presented in PVP2019-9304, it was well explained by creep damage from FEM analysis using isochronous curve based on API 579/ASME FFS-1 MPC Omega method. Following...

... Abstract A cracking damage was found in 347SS flange neck operated at about 520 deg.C after long term operation. In previous report presented in PVP2019-9304, it was well explained by creep damage from FEM analysis using isochronous curve based on API 579/ASME FFS-1 MPC Omega method. Following...