Allowable axial flaw sizes based on code given and actual measured flow stresses for high toughness ductile pipes subjected to internal pressure

Negyesi, M.*; Ha, Yoosung; Hasegawa, Kunio; Lacroix, V.*

Proceedings of the ASME 2025 Pressure Vessels & Piping Conference (PVP2025) (Internet), 6 Pages, 2025/07

https://doi.org/10.1115/PVP2025-152377

Fundamental consideration of allowable flaw lengths given by the ASME Code Section XI using flat plates under tensile loading

Negyesi, M.*; Hasegawa, Kunio

Proceedings of the ASME 2025 Pressure Vessels & Piping Conference (PVP2025) (Internet), 5 Pages, 2025/07

https://doi.org/10.1115/PVP2025-153753

Assessment of allowable flaw sizes based on tensile properties evaluated by instrumented indentation testing

Ha, Yoosung; Negyesi, M.*; Hasegawa, Kunio; Lacroix, V.*

Proceedings of the ASME 2025 Pressure Vessels & Piping Conference (PVP2025) (Internet), 7 Pages, 2025/07

https://doi.org/10.1115/PVP2025-154562

no abstracts in English

Allowable circumferential flaw sizes based on code given and actual measured flow stresses for high toughness ductile pipes subjected to bending and tensile loads

Negyesi, M.*; Ha, Yoosung; Hasegawa, Kunio; Lacroix, V.*

Proceedings of the ASME 2024 Pressure Vessels & Piping Conference (PVP 2024) (Internet), 6 Pages, 2024/07

Effect of temperature on the fatigue crack growth rates of austenitic stainless steels in an air environment for ASME Code Section XI

Morley, A.*; Negyesi, M.*; Hasegawa, Kunio

Proceedings of the ASME 2024 Pressure Vessels & Piping Conference (PVP 2024) (Internet), 7 Pages, 2024/07

Fatigue crack growth rates for stainless steels in air environment are provided by the ASME Code in Section XI. The crack growth rates increase with increasing temperature, and the temperature effect is expressed by a parameter ST. The current parameter ST is cumbersome, and original basis for the temperature function is questionable, consisting mostly of testing outside of the bounds of the temperatures of interest to its application in ASME Code Section XI. An alternative equation for ST for stainless steels in an air environment is proposed for ASME Code Section XI, based on the literature experimental data surveyed in this study.

The Influence of specimen surface roughness and temperature of steam injection on breakaway oxidation behavior of Zry-4 fuel cladding in steam at 1273 K

Negyesi, M.; Amaya, Masaki

Oxidation of Metals, 94(3-4), p.283 - 299, 2020/10

https://doi.org/10.1007/s11085-020-09992-5

The Effect of nitride formation on the oxidation kinetics of Zry-4 fuel cladding under steam-air atmospheres at 1273-1573 K

Negyesi, M.; Amaya, Masaki

Journal of Nuclear Materials, 524, p.263 - 277, 2019/10

https://doi.org/10.1016/j.jnucmat.2019.07.010

The Influence of the air fraction in steam on the growth of the columnar oxide and the adjacent -Zr(O) layer on Zry-4 fuel cladding at 1273 and 1473 K

Negyesi, M.; Amaya, Masaki

Annals of Nuclear Energy, 114, p.52 - 65, 2018/04

https://doi.org/10.1016/j.anucene.2017.12.017

High temperature oxidation of Zry-4 in oxygen-nitrogen atmospheres

Negyesi, M.; Amaya, Masaki

Proceedings of 25th International Conference on Nuclear Engineering (ICONE-25) (CD-ROM), 10 Pages, 2017/07

Study on breakaway oxidation of Zry-4 fuel cladding

Negyesi, M.

no journal, ,