|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||D-48: High Strength and Corrosion Resistant Al Alloys at High Temperature
||Irena Paulin, Borut Žužek, Peter Cvahte, Matjaž Godec
|On-Site Speaker (Planned)
Imagine aluminium alloys with high strength and good corrosion resistance at high temperature. We have developed an Al alloy AA 5xxx series with superior mechanical properties based on precipitation hardening and/or heat treatment. This was achieved by rapidly solidifying (RS) an Al alloy with a modified chemical composition to achieve a stable microstructure, based on non-coherent particles in a matrix that represent obstacles to the movement of dislocations. During RS, the non-soluble elements are frozen in the metallic matrix, and during the consolidation process, nano-sized intermetallic phases precipitate. Importantly, at high temperatures, these phases are stable, not soluble in the matrix, and are not subject to coalescence. The mechanism of high-strength and stable Al alloys at high temperature was studied by microstructure characterization during all steps in the process. The SEM, EDS, and EBSD studies confirmed the mechanism and mechanical properties confirmed the improvements to these Al alloys.
||Planned: Light Metals