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 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Formation and crystallization of Al-Ni-Ti amorphous alloys. / Kim, D. H.; Kim, W. T.
In: Materials Science and Engineering A, Vol. 385, No. 1-2, 15.11.2004, p. 44-53.Research output: Contribution to journal › Article
TY - JOUR
T1 - Formation and crystallization of Al-Ni-Ti amorphous alloys
AU - Kim, D. H.
AU - Kim, W. T.
PY - 2004/11/15
Y1 - 2004/11/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=7444233149&partnerID=8YFLogxK
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U2 - 10.1016/j.msea.2004.04.016
DO - 10.1016/j.msea.2004.04.016
M3 - Article
AN - SCOPUS:7444233149
VL - 385
SP - 44
EP - 53
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -