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Campillo Mauricio Sedaghati Ramin Drew Robin A. L. Alfonso Ismeli Prez Luis 《Engineering with Computers》2021,38(3):1767-1785
Engineering with Computers - In this article, a methodology based on Discrete Element Method (DEM) and Finite Elements Method (FEM) combined with modified Approximate Periodic Boundary Condition... 相似文献
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Ismeli Alfonso Cuauhtemoc Maldonado Gonzalo Gonzalez Arnoldo Bedolla 《Journal of Materials Science》2006,41(7):1945-1952
Three different quaternary alloys Al-6Si-3Cu-xMg (x = 0.59, 3.80 and 6.78 wt.%) were produced using conventional ingot casting metallurgy. The study was focused to investigate
the effect of magnesium and solution heat treatment on the microstructure. Results shown variations in composition and morphology
for the silicon-rich phases as well as a change of the predominant copper-rich phase Al2Cu (θ) to Al5Cu2Mg8Si6 (Q phase) when magnesium content is increased. The amount of Mg in solid solution was constant for the three different cast-alloys,
increasing considerably after solution heat treatment to 2.7 at.% for the alloy with higher Mg content This fact allowed to
obtain Cu:Mg ratios (in at.%) in solid solution lower than 1.0 for the alloys with 3.80 and 6.78 Mg wt.%, impossible to reach
for the alloy with low Mg content. During dissolution process, Al2Cu phase was observed to be more suitable to dissolve than Q phase. Fragmentation, spheroidization and coarsening of Q and
silicon-rich phases were observed. Solution time required for these processes occurrence was longer for Q phase. Solution
heat treatments at 480°C for 12 h were found to be appropriate for the studied alloys. 相似文献
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