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Title:Characterization of heterogeneous arc welds through miniature tensile testing and Vickers-hardness mapping
Authors:ID Hertelé, Stijn (Author)
ID Bally, Jonas (Author)
ID Gubeljak, Nenad (Author)
ID Štefane, Primož (Author)
ID Verleysen, Patricia (Author)
ID De Waele, Wim (Author)
ID Inštitut za kovinske materiale in tehnologije (Copyright holder)
Files:.pdf Materiali_in_tehnologije_2016_Hertele_et_al._Characterization_of_heterogeneous_arc_welds_through_miniature_tensile_testing_and_Vickers-h.pdf (797,43 KB)
MD5: B8DA2E0C9FC5D7CE4D9ADAE24382EBA6
 
URL http://mit.imt.si/Revija/izvodi/mit164/hertele.pdf
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:The heterogeneity of arc-welded connections is often ignored in structural assessments, giving rise to inaccuracies. Improved assessments taking into account heterogeneity require the characterization of local constitutive properties. We have compared two methods to do this: Vickers-hardness mapping and miniature tensile testing. Whereas the former is more straightforward to apply, the latter provides full-range stress-strain data. This paper discusses an experimental comparison of both methods on a heterogeneous arc weld. Miniature tensile tests were performed, using digital image correlation to measure the strain. The specimens were indented to compare their stress-strain response with Vickers hardness. Notwithstanding that small natural flaws invalidated some tests, reliable stress-strain curves were obtained. Vickers hardness testing is a convenient alternative if the yield and ultimate tensile strength are the only points of interest and the corresponding conversion inaccuracy is acceptable.
Keywords:arc weld, heterogeneity, hardness, miniature tensile testing, digital image correlation
Publication status:Published
Publication version:Version of Record
Year of publishing:2016
Number of pages:str. 571-574
Numbering:Letn. 50, št. 4
PID:20.500.12556/DKUM-65171 New window
ISSN:1580-2949
UDC:621.791.053:620.172:620.178.151.6
ISSN on article:1580-2949
COBISS.SI-ID:19697686 New window
DOI:10.17222/mit.2015.157 New window
NUK URN:URN:SI:UM:DK:PZO9TECA
Publication date in DKUM:14.03.2017
Views:1265
Downloads:421
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Categories:Misc.
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Record is a part of a journal

Title:Materiali in tehnologije
Shortened title:Mater. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1580-2949
COBISS.SI-ID:106193664 New window

Secondary language

Language:Slovenian
Title:Karakterizacija heterogenih zvarov s pomočjo miniaturnih nateznih preizkusov in matričnimi meritvami trdote po Vickersu
Abstract:Heterogenost obločno zavarjenega zvara pogosto ni upoštevana pri ocenjevanju celovitosti konstrukcij, kar je lahko razlog za nepravilno oceno. Za boljšo oceno, ki upošteva heterogenost, je potrebno določiti lokalne mehanske lastnosti. Avtorji članka so opravili primerjavo dveh metod za določanje lokalnih mehanskih lastnosti: matrično meritev mikrotrdote po Vickersu in miniaturni natezni preizkus. Za razliko od dosedanje prakse neposredne uporabe mejnih vrednosti, se danes uporablja celotna natezna krivulja napetost-deformacija. V članku je opravljena primerjava med obema eksperimentalno dobljenima skupinama podatkov za heterogeni zvarni spoj. Meritve deformacij na miniaturnih nateznih preizkušancih so bile opravljene s stereo optično digitalno merilno metodo. Na vsakemu od miniaturnih nateznih preizkušancev je bila opravljena meritev mikrotrdote po Vickersu, pri čemer so bile izmerjene vrednost mikrotrdote primerjane z natezno krivuljo napetost-deformacija. Kljub dejstvu, da so bili preizkušanci z majhnimi napakami v zvarih izključeni iz analize, so bile dobljene verodostojne vrednosti meje tečenja in natezne trdnosti iz krivulje napetost-deformacija. Pokazalo se je, da je za hitro oceno natezne trdnosti in meje tečenja materiala zvara, matrična meritev mikrotrdote po Vickersu alternativna metoda nateznemu preizkušanju.
Keywords:obločni zvar, heterogenost, trdota, miniaturno natezno preizkušanje, digitalne optične meritve


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