|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
||Microstructural Evolution in Dilute Mg-X Binary Alloys Processed by Mechanical Alloying
||Christian Roach, Kiran Solanki, Suveen Mathaudhu
|On-Site Speaker (Planned)
Grain size refinement is one of the most commonly used strengthening methods for metals, however, this approach has not been investigated in Mg and its alloys due to the reported suppression of twinning (and thus loss of important plasticity mechanisms). More so, combining the low melting point of Mg-alloys with a nanocrystalline state makes them susceptible to grain growth at low homologous temperatures. In this work we report the microstructural evolution and thermal stability of Mg and Mg-X (Al & Y) alloys at various concentrations of solute after processing by high-energy ball milling. Phase formation and grain size were probed via precision x-ray diffraction and Williamson-Hall analysis. Additionally, mechanical properties and response were investigated via instrumented nano- and micro-indentation testing. These results will help steer processing and synthesis of advanced nanocrystalline Mg-alloys with enhanced mechanical properties and performance.