Experimental study of strain-induced martensitic transformation
in 316L stainless steel sheets for LH2 storage and transportation
applications

Τζανέτος, Ιωάννης; Tzanetos, Ioannis

dc.contributor.author	Τζανέτος, Ιωάννης	el
dc.contributor.author	Tzanetos, Ioannis	en
dc.date.accessioned	2025-04-28T09:51:33Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/61794
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.29490
dc.rights	Αναφορά Δημιουργού-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nd/3.0/gr/	*
dc.subject	Hydrogen Embrittlement	en
dc.subject	Austenitic Stainless Steel	en
dc.subject	Cryogenic Storage	en
dc.subject	Martensite Transformation	en
dc.subject	Stacking Fault Energy	en
dc.subject	Ψαθυροποίηση Υδρογόνου	el
dc.subject	Ωστενιτικός Ανοξείδωτος Χάλυβας	el
dc.subject	Κρυογονική Αποθήκευση	el
dc.subject	Μετασχηματισμός Μαρτενσίτη	el
dc.subject	Ενέργεια Σφάλµατος Επιστοίβασης	el
dc.title	Experimental study of strain-induced martensitic transformation in 316L stainless steel sheets for LH2 storage and transportation applications	en
dc.title	Πειραματική μελέτη μαρτενσιτικού μετασχηματισμού υπό παραμόρφωση σε λεπτά ελάσματα ανοξείδωτου χάλυβα 316L, για χρήση σε δεξαμενές αποθήκευσης και μεταφοράς υγρού Υδρογόνου	el
heal.type	bachelorThesis
heal.classification	Material Science	en
heal.dateAvailable	2026-04-27T21:00:00Z
heal.language	en
heal.access	embargo
heal.recordProvider	ntua	el
heal.publicationDate	2024-11-12
heal.abstract	Current environmental studies and goals set by the International Maritime Organization dictate that the maritime industry should strive to reduce CO2 emissions. Solutions, other than improving efficiency, include the use of alternative fuels with promise being shown by hydrogen, whose oxidization produces only water. Main limitations concerning hydrogen as a fuel are its low volumetric energy density, which makes its liquefaction almost necessary for larger scale applications, and safety; the focus of the present work being the degradation of the metallic material in direct contact with LH2 of the tank due to embrittlement caused by the presence of hydrogen. One of the methods for storage currently examined in the literature is membrane-type tanks, already widely used for LNG storage and transportation, and one group of materials showing promise for this application are austenitic stainless steels, also currently used for LNG in the primary barrier. Austenitic stainless steels exhibit resistance to hydrogen embrittlement and have great mechanical properties in cryogenic temperatures, due to the TRIP (Transformation Induced Plasticity) effect and their f.c.c. structure. Although the generation of martensite through TRIP is beneficial at low temperatures when hydrogen isn’t present, evidence suggest that hydrogen susceptibility is correlated to the amount of martensite formed, with prior transformed martensite being especially harmful for the mechanical properties of the material. The material examined here was STS 316L. Specimens were pre-strained at 10%, 20% and 30% deformation and the martensite generated was measured with EBSD and XRD. No martensite was found in the As Received specimen, small amounts in the 10% and 20% cases and larger amounts in the 30% and fractured specimens. It was observed that the rate of transformation was slow at the start and rapid at higher strains. XRD measurements were also used to calculate the stacking fault energy, an important parameter of the TRIP effect, of the specimens and a decrease was observed with increasing pre-strain, which correlates with the fact that the rate of martensite generation is higher at higher strains.	en
heal.advisorName	Ζερβάκη, Άννα	el
heal.committeeMemberName	Νικόλαος, Τσούβαλης	el
heal.committeeMemberName	Λυρίδης, Δημήτριος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Μελέτης Πλοίου και Θαλάσσιων Μεταφορών	el
heal.academicPublisherID	ntua
heal.numberOfPages	98 σ.	el
heal.fullTextAvailability	false