Effect of cooling rate on the microstructure of an Al<sub>94</sub>Mn<sub>2</sub>Be<sub>2</sub>Cu<sub>2</sub> alloy
In this study the effect of the cooling rate on the microstructure of Al<sub>94</sub>Mn<sub>2</sub>Be<sub>2</sub>Cu<sub>2</sub> alloy was investigated. The vacuum induction melted and cast alloy was exposed to different cooling rates. The slowest cooli...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Croatian Metallurgical Society
2012-04-01
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| Series: | Metalurgija |
| Subjects: | |
| Online Access: | http://hrcak.srce.hr/file/111087 |
| Summary: | In this study the effect of the cooling rate on the microstructure of Al<sub>94</sub>Mn<sub>2</sub>Be<sub>2</sub>Cu<sub>2</sub> alloy was investigated. The vacuum induction melted and cast alloy was exposed to different cooling rates. The slowest cooling rate was achieved by the DSC (10 K•min<sup>-1</sup>), the moderate cooling rate succeeded by casting in the copper mould (≈1 000 K•s<sup>-1</sup>) and the rapid solidification was performed by melt spinning (up to 10<sup>6</sup> K•s<sup>-1</sup>). The microstructure of the DSC-sample consisted of α-Al matrix, and several intermetallics: τ<sub>1</sub>-Al<sub>29</sub>Mn<sub>6</sub>Cu<sub>4</sub>, Al<sub>4</sub>Mn, θ-Al<sub>2</sub>Cu and Be<sub>4</sub>Al(Mn,Cu). The microstructures of the alloy at moderate and rapid cooling consisted of the α-Al matrix, i-phase and θ-Al<sub>2</sub>Cu. Particles of i-phase and θ-Al<sub>2</sub>Cu were much smaller and more uniformly distributed in melt-spun ribbons. |
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| ISSN: | 0543-5846 1334-2576 |