Giesserei Literaturschau - Bundesverband der Deutschen Gießerei ...

BDG Informationszentrum
NE-Metallgusswerkstoffe
Dokumenten-Nummer: 57884
Zeitschriftenaufsatz
Dong, Quan-Zhi; Choi, Young-Sim; Hong, Jun-Ho; Hwang, Ho-Young
Publikationssprache: Englisch
Prediction of mechanical properties of Al alloys with change of cooling rate
Prädiktion der mechanischen Eigenschaften einer Aluminiumlegierung bei veränderter Kühlgeschwindigkeit
The solidification process significantly affects the mechanical properties and there are lots of factors that affect the
solidification process. Much progress has been made in the research on the effect of solidification on mechanical
properties. Among them, the PF (Phase Field) model and CA (Cellular Automata) model are widely used as simulation
methods which can predict nucleation and its growth, and the size and morphology of the grains during solidification.
Although they can give accurate calculation results, it needs too much computational memory and calculation time. So
it is difficult to apply the simulation to the real production process. In this study, a more practical simulation approach
which can predict the mechanical properties of real aluminum alloys is proposed, by identifying through experiment the
relationship between cooling rate and SDAS (Secondary Dendrite Arm Spacing) and mechanical properties. The
experimentally measured values and the values predicted by simulation have relatively small differences and the
mechanical properties of a variety of Al alloys are expected to be predicted before casting through use of the
simulation.
Korea University of Science & Technology (UST), Incheon, KR
China Foundry
Erscheinungsjahr 2012
Heftnummer 4
S. S.381-386 (6 Seiten, 10 Bilder, 6 Tabellen, 7 Quellen)
NE-Metallgusswerkstoffe
Dokumenten-Nummer: 57792
02 Publikationssprache: Englisch
Elsebaie, O.; Samuel, F. H.; Al Kahtani, S.
Intermetallic phases observed in non-modified and Sr modified Al-Si cast alloys containing
mischmetal
Beobachtung intermetallischer Phasen in unmodifizierten und mit Strontium modifizierten, Mischmetal enthaltenen
Al-Si-Legierungen
An extensive study was carried out to investigate the types of intermetallic phases observed in non-modified and Sr
modified A319.1, A356.2 and A413.1 alloys with 0, 2, 4 and 6 wt-% mischmetal (MM) additions and solidified under high
and low cooling rate conditions. Quantification of the intermetallics was carried out using electron probe microanalysis
and revealed that the total surface fraction of intermetallic phases increased with the addition of MM to the alloys.
Wavelength dispersion spectroscopic analysis was employed to identify these phases. In addition to the Al2Cu phase in
A319.1 alloy, the Mg2Si phase in A356.2 alloy and the platelet-like beta -Al5FeSi and alpha -Al15(MnFe)3Si2 and alpha
-Al15(MnFeNiCu)3Si2 Chinese script-like iron intermetallic phases in the A413.1 alloy, various MM containing
intermetallic phases were observed at high and low cooling rates, each exhibiting a specific Ce/La ratio and
morphology. Many of these MM containing intermetallic phases were found to contain Sr, which confirmed the
interaction of MM with Sr. Thus, the effectiveness of Sr as a modifier of the eutectic Si phase in these alloys would be
reduced.
Universite du Quebec, Chicoutimi, QC, CA; Central Metallurgical R&D Institute (CMRDI), Helwan, Cairo, EG; King Saud
University, Riyadh, SA; Salman bin Abdul-Aziz University, Al-Kharj, SA
International Journal of Cast Metals Research
Erscheinungsjahr 2013
Heftnummer 1
S. S.1-15 (15 Seiten, 10 Bilder, 9 Tabellen, 30 Quellen)
Giesserei Literaturschau