Abstract
Formation and crystallization behaviors of the Al-Ni-Ti amorphous alloys have been investigated in the present study. Among the amorphous alloy compositions investigated in the present study, only Al87.5Ni10Ti2.5 alloy composition exhibits a good ductility, i.e. 180° bending without fracture, indicating that the ductility of the Al-Ni-Ti amorphous alloys is strongly dependent on the alloy composition. Improved ductility can be obtained only when a few nanometer size Al crystals are embedded in the amorphous matrix. The amorphous Al-Ni-Ti alloys crystallize by either primary crystallization of nanometer-sized fcc-Al phase or by the simultaneous precipitation of fcc-Al and metastable intermetallic compound. The Al-Ni-Ti amorphous alloy showing the bending ductility crystallizes by diffusion-controlled growth of quenched-in Al crystals. On the other hand, the Al-Ni-Ti amorphous alloy without bending ductility crystallizes by diffusion-controlled nucleation and growth process.
| Original language | English |
|---|---|
| Pages (from-to) | 44-53 |
| Number of pages | 10 |
| Journal | Materials Science and Engineering A |
| Volume | 385 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 2004 Nov 15 |
Bibliographical note
Funding Information:The authors are grateful for the financial support by the Creative Research initiatives of the Korean Ministry of Science and Technology.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering