Impact toughness of reinforcing steels produced by (i) the Tempcore process and (ii) microalloying with vanadium

Nikolaou, J; Papadimitriou, GD

dc.contributor.author	Nikolaou, J	en
dc.contributor.author	Papadimitriou, GD	en
dc.date.accessioned	2014-03-01T01:22:30Z
dc.date.available	2014-03-01T01:22:30Z
dc.date.issued	2005	en
dc.identifier.issn	0734-743X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16593
dc.subject	Charpy	en
dc.subject	Reinforcing steel	en
dc.subject	Tempcore	en
dc.subject	Toughness	en
dc.subject	Vanadium microalloying	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	Brittle fracture	en
dc.subject.other	Ductility	en
dc.subject.other	Fracture toughness	en
dc.subject.other	Microstructure	en
dc.subject.other	Reinforcement	en
dc.subject.other	Tensile stress	en
dc.subject.other	Toughness	en
dc.subject.other	Vanadium alloys	en
dc.subject.other	Charpy	en
dc.subject.other	Reinforced steel	en
dc.subject.other	Tempcore	en
dc.subject.other	Vanadium microalloying	en
dc.subject.other	Steel structures	en
dc.title	Impact toughness of reinforcing steels produced by (i) the Tempcore process and (ii) microalloying with vanadium	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijimpeng.2004.05.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijimpeng.2004.05.005	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	A "direct measurement" of the impact toughness of both Tempcore and microalloyed with vanadium reinforcing steel bars, of the same strength class (50OMPa nominal yield stress), is undertaken. The term "direct measurement" means that V-notched specimens with the original round section of the bars (and not with the standard rectangular one) are used, mentioned here as direct V-notched (DVN) specimens. The major complications encountered with them are the use of non-standard geometry (Charpy V-notched, CVN), the variable size of the bars and the composite microstructure of the Tempcore reinforcing steel. It has been shown that the toughness characteristics of reinforcing steels may be estimated by the CVN impact test using direct (DVN) specimens. It is found that if the notch exceeds a critical depth, meaningful measurements may be obtained, regardless of the diameter of the reinforcing steel bar and that the transition temperature may be estimated from the residual fracture angle of direct (DVN) specimens. The microalloyed with vanadium reinforcing steel has a lower temperature-transition range from ductile-to-brittle fracture (-10 degrees C), compared to the AISI 1020 steel, attributed to the vanadium micro-additions, but it is higher compared to the Tempcore steel (-30 degrees C). (c) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Impact Engineering	en
dc.identifier.doi	10.1016/j.ijimpeng.2004.05.005	en
dc.identifier.isi	ISI:000228036000009	en
dc.identifier.volume	31	en
dc.identifier.issue	8	en
dc.identifier.spage	1065	en
dc.identifier.epage	1080	en