Particularities of the Formation and Modification of Si and Mg(2)si as Second Phases in Casting Al Alloys: Use of Shape Descriptors and Fractal Dimension
Por:
Soto, T. E., Gonzalez, F., Aguilar, C., Bejar, L., Figueroa, I. A., Vargas, J., Abatal, M., Alfonso, I.
Publicada:
1 oct 2022
Categoría:
Metals and alloys
Resumen:
This work presents an overview on the study of Si and Mg2Si, obtained as
second phases in aluminum alloys, including their modifications due to
processing conditions, alloying elements and heat treatments. These
micrometric phases are generally studied using optical microscopy (OM),
X-ray diffraction (XRD) and scanning electron microscopy (SEM). Although
they can be differentiated combining OM and SEM, a validation study
using XRD is indispensable. This work studies the peculiarities of using
these techniques, and the differentiation of Si and Mg2Si depending on
their XRD peaks, morphologies and gray scales. This review showed that
the presence of other second phases complicates the identification of Si
and Mg2Si. It also revealed that their morphological modifications have
been barely studied quantitatively. We are presenting some study cases
related to this topic, adding our own quantitative characterizations
through the use of shape descriptors and fractal dimension,
demonstrating their effectiveness and importance.
Filiaciones:
Soto, T. E.:
Univ Nacl Autonoma Mexico, Unidad Morelia, Inst Invest Mat, Campus Morelia UNAM, Morelia 58190, Michoacan, Mexico
Gonzalez, F.:
Univ Autonoma Metropolitana Iztapalapa, Dept Ingn & Proc Hidraul, AP 55-534, Mexico City 09340, DF, Mexico
Aguilar, C.:
Univ Tecn Federico Santa Maria, Dept Met & Mat Engn, Av Espana 1680,Casilla 110-5, Valparaiso, Chile
Bejar, L.:
Univ Michoacana, Fac Ingn Mecan, Edificio W,Ciudad Univ, Morelia 58000, Michoacan, Mexico
Figueroa, I. A.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N, Mexico City 04510, DF, Mexico
Vargas, J.:
Univ Nacl Autonoma Mexico, Unidad Morelia, Inst Invest Mat, Campus Morelia UNAM, Morelia 58190, Michoacan, Mexico
Abatal, M.:
Univ Autonoma Carmen, Fac Ingn, Campus 3,Ave Cent S-N, Ciudad del Carmen 24115, Campeche, Mexico
Alfonso, I.:
(Corresponding Author), Univ Nacl Autonoma Mexico, Unidad Morelia, Inst Invest Mat, Campus Morelia UNAM, Morelia 58190, Michoacan, Mexico
(Corresponding Author), Univ Autonoma Metropolitana Iztapalapa, Dept Ingn & Proc Hidraul, AP 55-534, Mexico City 09340, DF, Mexico
Univ Nacl Autonoma Mexico, Unidad Morelia, Inst Invest Mat, Campus Morelia UNAM, Morelia 58190, Michoacan, Mexico
Univ Autonoma Metropolitana Iztapalapa, Dept Ingn & Proc Hidraul, AP 55-534, Mexico City 09340, DF, Mexico
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