izpis_h1_title_alt

Thermal stresses in aluminium alloy die casting dies
Klobčar, Damjan (Avtor), Tušek, Janez (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://dx.doi.org/10.1016/j.commatsci.2008.03.009 Novo okno

Izvleček
The aim of this research is to analyze the influence of Aluminium Alloy die casting parameters, die material, and die geometry on in-service tool life. An innovative immersion testing apparatus is developed, at which Aluminium Alloy die casting is simulated. It enables controlled thermal fatigue cycling.Special specimens with different edge geometry and specimens with maraging steel welds deposited by Gas Tungsten Arc (GTA) welding are prepared.They are subjected to cyclic heating in bath of molten Aluminium Alloy 226 and cooling in bath of water-based lubricant. The specimens are continuously internally cooled with cold water. The microstructure, hardness profile, and the surface cracks developed are periodically analyzed after completion of a particular number of cycles. Temperature transients at different locations of the specimens are measured and used in calibration of finite element model (FEM). The computation of transient stresses is performedby developed FEM. The influence of immersion test parameters, material, specimen edge geometry, and thickness of maraging steel surfacing welds on thermal stresses is studied. To improve thermal fatigue testing efficiency, a specimen of particular geometry and immersion test parameters are developed based on finite element analysis. The results showed significant differences in produced thermal stresses for analyzed materials, test parameters, and edge geometries. Maraging steel is found to be superior material for die casting dies, due to generation of lower stresses.

Jezik:Angleški jezik
Ključne besede:tlačno litje, zlitine Al, maraging jekla, toplotne napetosti, varjenje, modeliranje končnih elementov, finite element modeling, high-pressure die casting, hot-work tool steel, maraging steel, immersion test, welding, finite element modeling, thermal fatigue cracking
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2008
Št. strani:str. 1147-1154
Številčenje:Letn. 43, št. 4
UDK:621.791:669.018.258
ISSN pri članku:0927-0256
COBISS.SI-ID:10651163 Povezava se odpre v novem oknu
Število ogledov:663
Število prenosov:136
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.
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Gradivo je del revije

Naslov:Computational materials science
Skrajšan naslov:Comput. mater. sci.
Založnik:Elsevier
ISSN:0927-0256
COBISS.SI-ID:15330053 Novo okno

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