The effect of composition on the mechanical properties of high Al content Al-Y-Ni metallic glasses has been studied. Nine samples in all were prepared with a composition of ${ rm Al sb{85}Y} sb{x}{ rm Ni} sb{15-x}({ rm x}=3, ...,11).$ The amorphous alloys were first tested using both XRD and DSC. The DSC runs revealed that the samples were made up of two different types: one showing no glass transition and a lower crystallization temperature, and the other showing a distinct glass transition with a higher crystallization temperature indicating that they are truly homogeneous glasses. The samples showed a Young's modulus that does not seem to reveal any distinct compositional dependence whereas, the tensile strengths showed a distinct decreasing trend with increasing Y content. Values of various mechanical properties and crystallization temperatures obtained in this study are compared to those reported by other groups. We find very high specific strengths in these glasses, which combined with their excellent ductility makes them ideal structural materials. The effect of annealing is also examined and it is found that the samples lose a large proportion of their tensile strength and ductility when annealed.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.26134 |
| Date | January 1993 |
| Creators | Sabet-Sharghi, Riaz |
| Contributors | Altounian, Z. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001394406, proquestno: MM94519, Theses scanned by UMI/ProQuest. |
Page generated in 0.002 seconds