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Improved prediction of low-cycle fatigue life for high-pressure die-cast aluminium alloy AlSi9Cu3 with significant porosity
ID Tomažinčič, Dejan (Author), ID Borovinšek, Matej (Author), ID Ren, Zoran (Author), ID Klemenc, Jernej (Author)

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Abstract
The fatigue life of a high-pressure die-cast alloy, AlSi9Cu3, with significant porosity is investigated. Standard specimens were cyclically loaded (R =-1) until fatigue rupture occurred. The specimens were [micro]-CT scanned to obtain a 3D representation of the pores. Models were used to computationally predict the fatigue life using two different methods. First, the fatigue life was predicted using a notch-strain approach combined with a Coffin- Manson durability relationship for homogeneous material. Second, the fatigue life was predicted using an homogenised un-notched model that was combined with an adapted Coffin-Manson relationship which consid-ered a fatigue life reduction due to different pore effects.

Language:English
Keywords:low-cycle fatigue, alloy AlSi9Cu3, porosity, notch-strain approach, finite element removal
Work type:Article (dk_c)
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2021
Publication status in journal:Published
Article version:Postprint, final article version, accepted into publication
Number of pages:Str. 1-12
Numbering:Vol. 144
UDC:519.876.5:620.178.3(045)
ISSN on article:0142-1123
DOI:10.1016/j.ijfatigue.2020.106061 This link opens in a new window
COBISS.SI-ID:46594307 This link opens in a new window
Publication date in RUL:14.01.2021
Views:316
Downloads:51
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Record is a part of a journal

Title:International journal of fatigue
Shortened title:Int. j. fatigue
Publisher:IPC Science and Technology Press
ISSN:0142-1123
COBISS.SI-ID:25643520 This link opens in a new window

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:14.01.2021

Secondary language

Language:Slovenian
Abstract:
Raziskava zajema analizo dobe trajanja zlitine AlSi9Cu3 s prisotno visoko stopnjo poroznosti. Preizkušanci standardnih oblik so bili ciklično obremenjeni (R = -1), do nastalega utrujenostnega loma. Vzorci so bili ob tem [mikro]-CT skenirani, da smo določili 3D geometrijo por. Modeli so bili nato uporabljeni pri izračunu dobe trajanja po dveh različnih metodah. Prvič, dobo trajanja smo napovedali po pristopu z zareznim učinkom v kombinaciji s Coffin-Manson razmerjem za homogeni material. Drugič, dobo trajanja smo napovedali ob uporabi homogenega idealiziranega modela, v kombinaciji s prilagojenim nivojem Coffin-Manson krivulje, ki upošteva znižanje dobe trajanja zaradi različnih učinkov por.

Keywords:malo-ciklično utrujanje, zlitina AlSi9Cu3, poroznost, pristop z zareznim učinkom, odstranitev končnega elementa

Projects

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project number:J2-8186
Name:Razvoj večnamenskih avksetičnih celičnih struktur

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