Acceleration of Environmentally Assisted Cracking Initiation of the Type 316L Steel in High-Temperature Water and Hydrogenated-Steam Vapor Environments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F20%3AN0000182" target="_blank" >RIV/26722445:_____/20:N0000182 - isvavai.cz</a>

Výsledek na webu

<a href="https://meridian.allenpress.com/corrosion/article-abstract/76/12/1177/447836/Acceleration-of-Environmentally-Assisted-Cracking?redirectedFrom=fulltext" target="_blank" >https://meridian.allenpress.com/corrosion/article-abstract/76/12/1177/447836/Acceleration-of-Environmentally-Assisted-Cracking?redirectedFrom=fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5006/3653" target="_blank" >10.5006/3653</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Acceleration of Environmentally Assisted Cracking Initiation of the Type 316L Steel in High-Temperature Water and Hydrogenated-Steam Vapor Environments

Popis výsledku v původním jazyce

Environmentally assisted cracking of solution-annealed Type 316L austenitic stainless steel with two different surface treatments (polished versus ground) was investigated using the constant extension rate tensile test methodology in high-pressure water at 350 degrees C and low-pressure H-2-steam vapor at 350 degrees C, 400 degrees C, 440 degrees C, and 480 degrees C, while maintaining electrochemical corrosion potentials in the NiO stability regime. Flat tapered specimens were used to indentify the threshold stress for cracking (similar to 400 MPa) under these environmental conditions. Intensive oxidation and typical intergranular cracks were observed to initiate from the polished surface at 400 degrees C and 440 degrees C, whereas wavy cracks initiated on the ground surface. The results indicate that the ultrafine-grained layer formed adjacent to the ground surface effectively suppressed intergranular crack initiation under these test conditions. The slow loading under H-2-steam vapor at 400 degrees C under the oxidizing condition (NiO) was found to be a suitable high-accelerated test to study early stages of the cracking.

Název v anglickém jazyce

Acceleration of Environmentally Assisted Cracking Initiation of the Type 316L Steel in High-Temperature Water and Hydrogenated-Steam Vapor Environments

Popis výsledku anglicky

Environmentally assisted cracking of solution-annealed Type 316L austenitic stainless steel with two different surface treatments (polished versus ground) was investigated using the constant extension rate tensile test methodology in high-pressure water at 350 degrees C and low-pressure H-2-steam vapor at 350 degrees C, 400 degrees C, 440 degrees C, and 480 degrees C, while maintaining electrochemical corrosion potentials in the NiO stability regime. Flat tapered specimens were used to indentify the threshold stress for cracking (similar to 400 MPa) under these environmental conditions. Intensive oxidation and typical intergranular cracks were observed to initiate from the polished surface at 400 degrees C and 440 degrees C, whereas wavy cracks initiated on the ground surface. The results indicate that the ultrafine-grained layer formed adjacent to the ground surface effectively suppressed intergranular crack initiation under these test conditions. The slow loading under H-2-steam vapor at 400 degrees C under the oxidizing condition (NiO) was found to be a suitable high-accelerated test to study early stages of the cracking.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Corrosion

ISSN

0010-9312

e-ISSN

1938-159X

Svazek periodika

76

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

1177–1193

Kód UT WoS článku

000617277000008

EID výsledku v databázi Scopus

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