INVESTIGADORES
SCHVEZOV Carlos Enrique
congresos y reuniones científicas
Título:
Effect of the solidifying structures on the wear resistance of Zn-Al alloys
Autor/es:
M.R. ROSENBERGER ; C. E. SCHVEZOV ; A.E. ARES
Lugar:
Philadelphia
Reunión:
Conferencia; 18th International Conference on the Wear of Materials; 2011
Institución organizadora:
Wear of Materials, Inc and Elsevier
Resumen:
The
effect of the solidifying structures on the wear resistance of Zn-Al alloys is
analyzed; for that reason, ingots of diluted Zn-Al alloy (4 %wt and less) were
performed in a directional cooling furnace to obtain cylindrical ingots with
three regions: one with columnar grains, other with equiaxed grains and in the
middle other with a mix of both grains called the Columnar-to-Equiaxed
Transition (CET). A representative sample of each region was cut and tested by
wear resistance. The dry sliding wear resistance is measured in a pin on ring
machine; using a carbon steel disk as counterface, which rotate at 2.7 m/s as
tangential velocity while the sample is pressed at 32,4 N of load. The wear resistance
were analyzed and compared with the grains size and the secondary spacing of
the dendrites. The wear resistance of the equiaxed regions is larger than the
resistance for the columnar and transition regions. In all the regions the wear
resistance increase when the aluminum concentration increase. At large aluminum
composition the wear resistance of equiaxed and columnar regions are the same.
A clear relation is observed between the wear resistance and the secondary
dendritic spacing, when increase the spacing decrease the wear resistance. The
equiaxed region has the larger values of wear resistance and the columnar the less
for the same spacing. On the other hand, at lower and larger spacing the wear resistance
of the all the structures converge.