Adaptation of a Slow Strain Rate Test Method for Highly Hydrogen Resistant Austenitic Stainless Steels

Stefanie Pichler

Adaptation of a Slow Strain Rate Test Method for Highly Hydrogen Resistant Austenitic Stainless Steels

Titel in Übersetzung: Adaptierung einer Langsamzugversuchs-Methode für hoch Wasserstoff-beständige austenitische Stähle

Stefanie Pichler

Lehrstuhl für Allgemeine und Analytische Chemie (120)

Publikation: Thesis / Studienabschlussarbeiten und Habilitationsschriften › Masterarbeit

Abstract

Materialien mit hoher Beständigkeit gegen wasserstoffinduzierte Spannungsrisskorrosion, beispielsweise die austenitischen Stähle A286 und P750, sind in herkömmlichen standardisierten Tests, in denen sie einer Wasserstoffumgebung ausgesetzt sind, schwer voneinander unterscheidbar. Daher sind schärfere Testbedingungen erforderlich. Bei der standardisierten Prüfmethode handelt es sich um einen Langsamzugversuch, bei dem die Proben einer kathodischen Polarisation ausgesetzt sind. Basierend auf dieser standardisierten Prüfmethode wurden drei Parameter variiert, die Stromdichte, das Einbringen eines Rekombinationsgiftes in die Beladungslösung und die Temperatur. Zusätzlich wurden die thermische Desorptionsanalyse und Rasterelektronenmikroskopie eingesetzt, um die erhaltenen Ergebnisse besser zu interpretieren. Durch die Zugabe eines Rekombinationsgiftes in die Lösung wurde eine deutliche Steigerung der Aggressivität des Tests erreicht, unabhängig von der Art und Menge des Rekombinationsgiftes. Darüber hinaus wurde die Testdauer erheblich verkürzt. Änderungen der Stromdichte und Temperatur hatten nur geringe Auswirkungen auf das Testergebnis.

Titel in Übersetzung	Adaptierung einer Langsamzugversuchs-Methode für hoch Wasserstoff-beständige austenitische Stähle
Originalsprache	Englisch
Qualifikation	Dipl.-Ing.
Gradverleihende Hochschule	Montanuniversität
Betreuer/-in / Berater/-in	Eskinja, Magdalena, Mitbetreuer (intern) Mori, Gregor, Betreuer (intern)
Datum der Bewilligung	11 Apr. 2025
Publikationsstatus	Veröffentlicht - 2025

Bibliographische Notiz

gesperrt bis 11-03-2030

Schlagwörter

Wasserstoffinduzierte Spannungsrisskorrosion
Langsamzugversuche
Kathodische Polarisation
Austenitische Stähle
Rasterelektronenmikroskopie
Thermische Desorptionsanalyse

Dieses zitieren

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title = "Adaptation of a Slow Strain Rate Test Method for Highly Hydrogen Resistant Austenitic Stainless Steels",

abstract = "Materials with high resistance to hydrogen induced stress cracking for instance the austenitic stainless steels A286 and P750 are difficult to distinguish from one another in standard conventional tests where they are exposed to hydrogen environment. Therefore, more stringent test environments are required. The standardized test method involves a slow strain rate test in which the specimens are exposed to cathodic polarization. Based on this standardized test method, three parameters were varied. These include the current density, the introduction of a recombination poison into the charging solution and the temperature. Additionally, thermal desorption analysis and scanning electron microscopy were employed to improve interpretation of the obtained results. By the introduction of a recombination poison into the solution a significant increase in the stringency of the test was accomplished, irrespective of the kind and quantity of the recombination poison. Moreover, the test duration was reduced considerably. Alterations in current density and temperature had only a minor effect on the test outcome.",

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TY - THES

T1 - Adaptation of a Slow Strain Rate Test Method for Highly Hydrogen Resistant Austenitic Stainless Steels

AU - Pichler, Stefanie

N1 - embargoed until 11-03-2030

PY - 2025

Y1 - 2025

N2 - Materials with high resistance to hydrogen induced stress cracking for instance the austenitic stainless steels A286 and P750 are difficult to distinguish from one another in standard conventional tests where they are exposed to hydrogen environment. Therefore, more stringent test environments are required. The standardized test method involves a slow strain rate test in which the specimens are exposed to cathodic polarization. Based on this standardized test method, three parameters were varied. These include the current density, the introduction of a recombination poison into the charging solution and the temperature. Additionally, thermal desorption analysis and scanning electron microscopy were employed to improve interpretation of the obtained results. By the introduction of a recombination poison into the solution a significant increase in the stringency of the test was accomplished, irrespective of the kind and quantity of the recombination poison. Moreover, the test duration was reduced considerably. Alterations in current density and temperature had only a minor effect on the test outcome.

AB - Materials with high resistance to hydrogen induced stress cracking for instance the austenitic stainless steels A286 and P750 are difficult to distinguish from one another in standard conventional tests where they are exposed to hydrogen environment. Therefore, more stringent test environments are required. The standardized test method involves a slow strain rate test in which the specimens are exposed to cathodic polarization. Based on this standardized test method, three parameters were varied. These include the current density, the introduction of a recombination poison into the charging solution and the temperature. Additionally, thermal desorption analysis and scanning electron microscopy were employed to improve interpretation of the obtained results. By the introduction of a recombination poison into the solution a significant increase in the stringency of the test was accomplished, irrespective of the kind and quantity of the recombination poison. Moreover, the test duration was reduced considerably. Alterations in current density and temperature had only a minor effect on the test outcome.

KW - Wasserstoffinduzierte Spannungsrisskorrosion

KW - Langsamzugversuche

KW - Kathodische Polarisation

KW - Austenitische Stähle

KW - Rasterelektronenmikroskopie

KW - Thermische Desorptionsanalyse

KW - Hydrogen induced stress cracking

KW - Slow strain rate tests

KW - Cathodic polarisation

KW - Austenitic stainless steels

KW - Scanning electron microscopy

KW - Thermal desorption analysis

M3 - Master's Thesis

ER -