TY - GEN
T1 - Simplified rheocasting of Al-Si alloys sheared by mechanical stirring
AU - Hernández, Alfredo
AU - Chávez, J. Federico
AU - Hernández, Raquel E.
N1 - Publisher Copyright:
© (2015) Trans Tech Publications, Switzerland.
PY - 2015
Y1 - 2015
N2 - A rheocasting prototype for the semi-solid processing of Al-Si alloys was designed and assembled at laboratory scale, this is the first attempt for the development of S2P equipment in Mexico. This work describes the simplified method of mechanical stirring and the calculation of the theoretical parameters for the operation of the experimental device in order to provide shear rate into the slurry by a stainless steel impeller inside a crucible made of hot work steel. This paper presents a new design of rheocasting equipment. Moreover, a vertical pressure die-rheocasting system it is applied with the semi-solid alloy flowing counter the position of the injector during the displacement of the crucible in order to fill the mold. The semi-solid state with thixotropic behavior was produced in stirred AlSi7Mg alloy. The nondendritic morphology was arrived at via the intensive stirring at the beginning of the solidification. This process produces the trimming of dendrites, growing so the primary solid (α) in globular shape surrounded by eutectic microstructure. The semi-solid material was solidified in the mold and preliminary microstructural characterization was performed.
AB - A rheocasting prototype for the semi-solid processing of Al-Si alloys was designed and assembled at laboratory scale, this is the first attempt for the development of S2P equipment in Mexico. This work describes the simplified method of mechanical stirring and the calculation of the theoretical parameters for the operation of the experimental device in order to provide shear rate into the slurry by a stainless steel impeller inside a crucible made of hot work steel. This paper presents a new design of rheocasting equipment. Moreover, a vertical pressure die-rheocasting system it is applied with the semi-solid alloy flowing counter the position of the injector during the displacement of the crucible in order to fill the mold. The semi-solid state with thixotropic behavior was produced in stirred AlSi7Mg alloy. The nondendritic morphology was arrived at via the intensive stirring at the beginning of the solidification. This process produces the trimming of dendrites, growing so the primary solid (α) in globular shape surrounded by eutectic microstructure. The semi-solid material was solidified in the mold and preliminary microstructural characterization was performed.
KW - Non-dendritic microstructure
KW - Rheocasting
KW - Semi-solid processing
KW - Thixotropic behavior
UR - http://www.scopus.com/inward/record.url?scp=84944268871&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.651-653.1545
DO - 10.4028/www.scientific.net/KEM.651-653.1545
M3 - Contribución a la conferencia
AN - SCOPUS:84944268871
SN - 9783038354710
T3 - Key Engineering Materials
SP - 1545
EP - 1550
BT - Key Engineering Materials
A2 - Ofenheimer, Aldo
A2 - Poletti, Cecilia
A2 - Schalk-Kitting, Daniela
A2 - Sommitsch, Christof
PB - Trans Tech Publications Ltd
T2 - 18th International ESAFORM Conference on Material Forming, ESAFORM 2015
Y2 - 15 April 2015 through 17 April 2015
ER -