| Naslov: | Thermal stability of Al-Mn-Be melt-spun ribbons |
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| Avtorji: | ID Lojen, Gorazd (Avtor)
ID Bončina, Tonica (Avtor)
ID Zupanič, Franc (Avtor) |
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| Datoteke: |  Materiali_in_Tehnologije_2012_Lojen,_Boncina,_Zupanic_THERMAL_STABILITY_OF_Al-Mn-Be_MELT-SPUN_RIBBONS.pdf (777,98 KB)
MD5: 690600240120D1384439D82CE6FE6272
 http://mit.imt.si/Revija/izvodi/mit124/lojen.pdf
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Znanstveno delo |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | FS - Fakulteta za strojništvo
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| Opis: | As with other kinds of finely dispersed, small particles, icosahedral quasicrystals (IQCs) also have a distinct strengthening effect, which can be utilised to enhance the mechanical properties of aluminium alloys. In Al-Mn-Bealloys, IQCs already form at moderate cooling rates, which can be utilised when using some conventional casting processes, like mould or injection casting. In this case, however, crystalline intermetallic phases are also present and the mechanical properties are inferior to those of two-phase aAl-IQC alloys. Two-phase microstructures are feasible using rapid solidification techniques, e.g., melt spinning. Further processing often involves technologies (consolidation, extrusion etc.), which include the influence of heat. The alloy must not be overheated in order to preserve the strengthening effect of the metastable IQC-particles. In this investigation the Al-Mn-Be alloy was melt-spun using a free-jet melt spinner. Subsequently, the thermal stability of the IQCs was explored by annealing the ribbons for 24h at different temperatures. The samples were examined in the as-cast and heat-treated conditions using a dual-beam, scanning electron microscope (SEM-FIB), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). It was discovered that in the as-cast condition, the ribbons had a two-phase microstructure, consisting of an aAl matrix and finely dispersed IQCs. During annealing at temperatures up to 400 °C, the IQCs did not decompose and the phase composition remained unchanged. Annealing at 500 °C and at higher temperatures caused a decomposition of the IQCs, and only the crystalline intermetallic phases Al6Mn and Be4AlMn could be found in the aAl matrix. |
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| Ključne besede: | quasicrystal, Al-Mn-Be alloy, thermal stability |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Leto izida: | 2012 |
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| Št. strani: | str. 329-333 |
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| Številčenje: | Letn. 46, št. 4 |
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| PID: | 20.500.12556/DKUM-50132  |
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| ISSN: | 1580-2949 |
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| UDK: | 669.71'74'725:621.74.046 |
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| COBISS.SI-ID: | 16153366 |
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| ISSN pri članku: | 1580-2949 |
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| NUK URN: | URN:SI:UM:DK:BN9GKLNX |
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| Datum objave v DKUM: | 10.07.2015 |
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| Število ogledov: | 1784 |
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| Število prenosov: | 211 |
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| Metapodatki: |    |
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| Področja: | Ostalo
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