|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Micromechanical Properties of Marginal Glass Forming Alloys
||İlkay Kalay, Tolga Han Ulucan, Sezer Özerinç, Yunus Kalay
|On-Site Speaker (Planned)
Al-Rare Earth (RE) based alloys constitute an important class of the marginal glass forming alloys, where the primary crystallization is accompanied by the presence of Al nanocrystals. In this study, we produced Al-Tb melt-spun marginal metallic glass ribbons and heat-treated them at different temperature to form Al nanocrystals with different size and number density embedded in the amorphous matrix. Nanoindentation and micropillar compression tests were performed to reveal the micro mechanical properties of the amorphous and partially crystalline alloys. SEM images have been taken to investigate fracture behavior. The heat-treated specimens which contain fcc-Al nanocrystals show strengths above 1.2 GPa with the indication of curvatures in stress-strain demonstrating an enhanced ductility. The mechanisms behind the increased strength and ductility through devitrification will be discussed in details using a combined study of micromechanical characterization, differential scanning calorimetry, X-ray diffraction and electron microscopy.