INVESTIGADORES
ARES alicia esther
congresos y reuniones científicas
Título:
RELATIONSHIPS BETWEEN STRUCTURES AND PROPERTIES OF AL-CU ALLOYS
Autor/es:
ALICIA ESTHER ARES; LILIANA MABEL GASSA; SERGIO FABIAN GUEIJMAN; CARLOS ENRIQUE SCHVEZOV
Lugar:
San Diego, CA, USA.
Reunión:
Simposio; SHAPE CASTING: FOURTH INTERNATIONAL SYMPOSIUM; 2011
Institución organizadora:
TMS
Resumen:
The objective of the present research consist
on studying the type of structure (columnar, equiaxed or with columnar to
equiaxed transition, CET) using parameters of the solidification process and
electrochemical parameters in Al, Cu and Al-Cu alloys with different
concentrations. In order to obtain columnar, equiaxed and CET structures, the
alloys were directionally solidified upwards in an experimental set up with a
set of thermocouples in the samples which permit to determine the time
dependent profiles during the process. The electrochemical studies of the samples
were realized by using an electrochemical impedance spectroscopy (EIS)
technique and potentio-dynamic polarization curves immersed in 3% NaCl solution
at room temperature. In general, we observed that the susceptibility to
corrosion of the different structures depends on the size of the secondary
dendritic spacing and proportion of Al2Cu phase and Al-rich phase.
