Effect of rapid solidification and addition of Cu<inf>3</inf>P on the mechanical properties of hypereutectic Al-Si alloys

Miguel Ángel Suárez-Rosales, Raúl Pinto-Segura, Elia Guadalupe Palacios-Beas, Alfredo Hernández-Herrera, José Federico Chávez-Alcalá

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

© 2016 Universidade Federal de Sao Carlos. All rights reserved. The combined processes; rapid solidification, addition of Cu3P compound and heat treatments to improve the mechanical properties of the hypereutectic Al-13Si, Al-20Si and Al-20Si-1.5Fe-0.7Mn alloys (in wt. %) was studied. Optical microscopy and scanning electron microscopy were used to characterize the microstructures. The mechanical properties were evaluated by tensile tests. It was found that the cooling rate (20-50°C/s) used to solidify the alloys plus the addition of Cu3P compound favored the formation of fine primary Si and the transformation of the Al/Si eutectic from acicular to semi-transformed morphology. The spheroidization of the Al/Si eutectic after heat treatment caused an increase in the elongation (%) compared with the as-cast alloys. Al-13Si alloy showed the highest UTS and elongation (%) values, reaching values up to 215 MPa and 9.6%, respectively. On the other hand, the Al-20Si-1.5Fe-0.7Mn alloy showed the lowest UTS (180MPa) and elongation (3.4%) values. The formation of the Fe-intermetallic compounds caused a negative effect on the mechanical properties of the Al-20Si-1.5Fe-0.7Mn alloy.
Original languageAmerican English
Pages67-73
Number of pages59
DOIs
StatePublished - 1 Dec 2016
Externally publishedYes
EventMaterials Research -
Duration: 1 Dec 2016 → …

Conference

ConferenceMaterials Research
Period1/12/16 → …

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