Study of Microstructure and Corrosion Behavior of AH36 FSW Welds and HSLA S690 ARC Weld

Μπούτσαλη, Βασιλική; Boutsali, Vasiliki

dc.contributor.author	Μπούτσαλη, Βασιλική	el
dc.contributor.author	Boutsali, Vasiliki	en
dc.date.accessioned	2017-03-08T08:32:05Z
dc.date.available	2017-03-08T08:32:05Z
dc.date.issued	2017-03-08
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/44561
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.5245
dc.description	Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Ναυτική και Θαλάσσια Τεχνολογία και Επιστήμη”	el
dc.rights	Default License
dc.subject	Διάβρωση	el
dc.subject	Χάλυβας	el
dc.subject	Υλικά ψηλής αντοχής	el
dc.subject	S690	en
dc.subject	AH36	en
dc.subject	HSLA	en
dc.subject	Corrosion	en
dc.title	Study of Microstructure and Corrosion Behavior of AH36 FSW Welds and HSLA S690 ARC Weld	en
heal.type	masterThesis
heal.classification	Corrosion	en
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh99005345
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2016-02-23
heal.abstract	This thesis is entitled “Study of microstructure and corrosion behavior of AH36 FSW welds and HSLA S690 ARC welds”. The experiments took place at the Shipbuilding Technology Laboratory of the school of Naval Architecture and Marine Engineering at National Technical University of Athens. The purpose of the thesis is to study and compare the corrosion behavior of arc welding, a conventional welding method, with the friction stir welding, a new method of welding in shipbuilding. Thus, within the present thesis, the microstructure and the corrosion behavior of the above two welds were studied. Moreover, for these welds, two different shipbuilding steels have been used: the common shipbuilding steel (AH36) and a high strength low alloy steel, (HSLA - S690). The HSLA steels are used in recent years in Shipbuilding, as they exhibit improved properties concerning mechanical properties and particularly on the fatigue strength. Specifically, the metallography of the welds and their micro-hardness are studied initially and then, their corrosion behavior. The study of corrosion was made by two methods: electrochemical and standardized methods of accelerated aging in a salt spray chamber. The electrochemical methods, which were used are the following: the linear polarization, the Tafel and the method of electrochemical impedance. Furthermore, it was attempted to measure the three-dimensional shape of a corroded specimen’s surface and compare it with the surface of a non-corroded one, by using a structured white light 3D scanner. Finally, substantial conclusions which have arisen through the entire course of this research are noted.	en
heal.advisorName	Παντελής, Δημήτρης	el
heal.committeeMemberName	Τσούβαλης, Νικόλαος	el
heal.committeeMemberName	Βοσνιάκος, Χρήστος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	180 σ.	el
heal.fullTextAvailability	true