|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Processing and Characterization of High-Temperature Resistant Aluminum Alloys Microalloyed with Sc, Er and Zr
||Dinc Erdeniz, Wahaz Nasim, Jahanzaib Malik, Sung-Il Baik, Bilal Mansoor, Georges Ayoub, Ibrahim Karaman, David Seidman, David Dunand
|On-Site Speaker (Planned)
Castable, heat-treatable aluminum alloys, strengthened by L12 ordered, coherent Al3(Sc,Er,Zr) nano-sized precipitates, are developed as cost-effective, creep- and coarsening-resistant materials for aerospace and automotive applications. Microstructural and mechanical evolution is investigated during isochronal and isothermal heat treatments on samples characterized via electrical conductivity and micro-hardness testing, and atom probe tomography. A peak hardness value of ~600 MPa is obtained after a double-aging treatment at 350 and 400 °C. As-cast and peak-aged alloys are then thermo-mechanically processed via equal channel angular pressing for grain refinement and subjected to tensile testing at ambient and elevated temperatures. The alloy creep behavior is also investigated at temperatures between 300 and 400 °C, and correlated to the grain size and precipitate size, volume fraction, composition, and mismatch with matrix.
||Planned: A print-only volume