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Title:Fatigue crack initiation from microstructurally small Vickers indentations
Authors:Vuherer, Tomaž (Author)
Godina, Andrej (Author)
Burzić, Zijah (Author)
Gliha, Vladimir (Author)
Files:.pdf Metalurgija_2007_Vuherer_et_al._Fatigue_crack_initiation_from_microstructurally_small_vickers_indentations.pdf (1,02 MB)
MD5: F0CD126F03B71CF7A1AA0327FA43AC59
 
URL http://hrcak.srce.hr/15012
 
Language:English
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:The resistivity of coarse grain steel against crack initiation in the presence of micro defects is discussed. Samples of material with martensitic microstructure were prepared by adequate thermal treatment. Microstructurally small Vickers indentations were used as an artificial micro defect. The compressive residual stresses are due to the irreversibility of plastic deformation. The moment of indenting enables to prepare samples with and without effects of residual stresses. The stress level for crack initiation depends on the actual indentation size. The location of initiated cracks is affected by the presence and character of residual stresses.
Keywords:welded joints, micro defect, coarse grain HAZ, crack initiation, crack growth, stress concentration, fatigue limit, Vickers, residual stresses
Year of publishing:2007
Number of pages:str. 237-243
Numbering:št .4, Letn. 46
ISSN:1334-2576
UDC:621.791.051:539.388.1
ISSN on article:1334-2576
COBISS_ID:11582742 New window
NUK URN:URN:SI:UM:DK:ZYN4AAHT
Views:640
Downloads:82
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Categories:Misc.
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Record is a part of a journal

Title:Metalurgija
Publisher:Hrvatsko metalurško društvo
ISSN:1334-2576
COBISS.SI-ID:524301593 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:03.07.2017

Secondary language

Language:Croatian
Title:Nastanak zamorne pukotine iz mikrostrukturno malih vickersovih otisaka
Abstract:Proučavana je otpornost grubozrnatog dijela zone utjecaja topline na nastanak zamorne pukotine u prisustvu mikro greški. Uzorci materijala s martenzitnom grubozrnatom mikrostrukturom pripremljeni su odgovarajućom toplinskom obradom. Kao umjetne mikro greške upotrijebljene su mikrostrukturno mali Vickers otisci. Tlačna zaostala naprezanja pojave se zbog nepovratnosti plastične deformacije. Moment kad se napravi otisak omogućava pripremu uzoraka s i bez efekata zaostalih naprezanja. Kritičkna razina naprezanja za nastanak pukotine zavisi od stvarne veličine otiska. Na lokaciju nastanka pukotine utječe i prisutnost te vrsta zaostalih naprezanja.
Keywords:zvarni spoji, mikro defekt, grobo zrnato TVP, nastanek razpoke, rast razpoke, koncentracija napetosti, lomna trdnost, Vickers, zaostale napetosti


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