ALLOWABLE STRESS AND ALLOWABLE FLAW SIZES ESTIMATED BY CONVERTED TENSILE PROPERTIES FROM HARDNESS FOR AUSTENITIC STAINLESS STEEL PIPE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F24%3A10256711" target="_blank" >RIV/61989100:27360/24:10256711 - isvavai.cz</a>

Výsledek na webu

<a href="https://asmedigitalcollection.asme.org/PVP/proceedings-abstract/PVP2024/88476/V001T01A071/1209310" target="_blank" >https://asmedigitalcollection.asme.org/PVP/proceedings-abstract/PVP2024/88476/V001T01A071/1209310</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/PVP2024-122432" target="_blank" >10.1115/PVP2024-122432</a>

Jazyk výsledku

angličtina

Název v původním jazyce

ALLOWABLE STRESS AND ALLOWABLE FLAW SIZES ESTIMATED BY CONVERTED TENSILE PROPERTIES FROM HARDNESS FOR AUSTENITIC STAINLESS STEEL PIPE

Popis výsledku v původním jazyce

If a flaw in a high-toughness ductile pipe of a power plant is detected during periodic in-service inspection, stress applied at the flaw location of the pipe is compared with an allowable stress. When the applied stress is less than the allowable stress, the plant can operate continuously for a certain evaluation period in accordance with ASME Code Section XI. The flow stress given by the average of yield strength and ultimate tensile strength is an important material parameter for allowable stress. Recently, many fitness-for-service codes and technical reports have adopted conversions from hardness measurement values to yield strength and ultimate tensile strength. In this paper, we introduced the flow stress obtained from converted tensile properties from Vickers hardness using the presented equations for austenitic stainless steel. The allowable stress and allowable crack depths (sizes) estimated by the Vickers hardness were compared with those determined by actual tensile properties. As a result, the flow stress converted from hardness was about 1.5 times larger than that obtained by actual flow stress. The allowable flaw sizes calculated by the flow stress converted from hardness gave an appropriate indication when the allowable or applied stress was very low. However, the flow stress converted from hardness gave unconservative allowable stress, when the applied stress was large. Since the results are based on one available hardness measurement, other hardness measurements should be necessary to confirm these preliminary conclusions.

Název v anglickém jazyce

ALLOWABLE STRESS AND ALLOWABLE FLAW SIZES ESTIMATED BY CONVERTED TENSILE PROPERTIES FROM HARDNESS FOR AUSTENITIC STAINLESS STEEL PIPE

Popis výsledku anglicky

If a flaw in a high-toughness ductile pipe of a power plant is detected during periodic in-service inspection, stress applied at the flaw location of the pipe is compared with an allowable stress. When the applied stress is less than the allowable stress, the plant can operate continuously for a certain evaluation period in accordance with ASME Code Section XI. The flow stress given by the average of yield strength and ultimate tensile strength is an important material parameter for allowable stress. Recently, many fitness-for-service codes and technical reports have adopted conversions from hardness measurement values to yield strength and ultimate tensile strength. In this paper, we introduced the flow stress obtained from converted tensile properties from Vickers hardness using the presented equations for austenitic stainless steel. The allowable stress and allowable crack depths (sizes) estimated by the Vickers hardness were compared with those determined by actual tensile properties. As a result, the flow stress converted from hardness was about 1.5 times larger than that obtained by actual flow stress. The allowable flaw sizes calculated by the flow stress converted from hardness gave an appropriate indication when the allowable or applied stress was very low. However, the flow stress converted from hardness gave unconservative allowable stress, when the applied stress was large. Since the results are based on one available hardness measurement, other hardness measurements should be necessary to confirm these preliminary conclusions.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/EF17_048%2F0007373" target="_blank" >EF17_048/0007373: Predikce poškození konstrukčních materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of ASME 2024 Pressure Vessels &amp; Piping Conference, PVP2024. Volume 1. July 28-August 2, 2024 Bellevue, Washington

ISBN

978-0-7918-8847-6

ISSN

0277-027X

e-ISSN

0277-027X

Počet stran výsledku

6

Strana od-do

"V001T01A071"

Název nakladatele

American Society of Mechanical Engineers

Místo vydání

New York

Místo konání akce

Bellevue

Datum konání akce

28. 7. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—