About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
2020 Technical Division Student Poster Contest
|
Presentation Title |
SPU-9: Effects of Mg+Si Additions on the Microstructure and Mechanical Properties of Al-Ce-Sr based Alloys |
Author(s) |
Ramon F. Padin, Manny X. de Jesus, Oscar Marcelo Suarez |
On-Site Speaker (Planned) |
Ramon F. Padin |
Abstract Scope |
This project aims to study the effects of minute additions of Mg and Si to produce a creep resistant and competitive Al-Ce-Sr alloy. To these purposes, alloys with high concentrations of Ce and Sr with minute additions of Mg and Si in a 5:1 atomic ratio were arc melted in an argon atmosphere. A twofold increase in hardness at a maximum concentration of 5.9% wt. Mg and 1.3% wt. Si resulted with no significant change in hardness after T4 or T6 heat treatment. Optical microscopy and Vickers hardness tests permitted to evaluate the microstructure and mechanical properties, respectively. X-ray diffraction allowed identifying the phases present before and after heat treatment. Ancillary density measurements revealed a 3.6% decrease in density at the highest Mg and Si content. Ongoing work involves SEM and EDS for phase identification and chemical composition determination. |
Proceedings Inclusion? |
Undecided |