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11.
Quasicrystal-strengthened cast Al-alloys
Franc Zupanič, Tonica Bončina, Niko Rozman, Boštjan Markoli, 2011, izvirni znanstveni članek

Ključne besede: aluminium, quasicrystal, strengthening, mechanical properties
Objavljeno v DKUM: 01.06.2012; Ogledov: 2146; Prenosov: 35
URL Povezava na celotno besedilo

12.
Thermal stability of Al-Mn-Be melt-spun ribbons
Gorazd Lojen, Tonica Bončina, Franc Zupanič, 2011, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: icosahedral quasicrystals, aluminium alloys
Objavljeno v DKUM: 01.06.2012; Ogledov: 1536; Prenosov: 75
URL Povezava na celotno besedilo

13.
Turning of high quality aluminium alloys with minimum costs
Marko Reibenschuh, Franc Čuš, Uroš Župerl, 2011, izvirni znanstveni članek

Opis: Turning is one of the most common metal cutting procedures used. To optimize such a cutting process, some adaptations must be made. Implementing tool wear conditioning and the use of dry cutting can significantly lower the production cost. This research focuses on the cost effectiveness of using dry cutting in comparison with the use of cutting fluids and the use of different tool geometry. A series of tests was conducted and in the end the results are given.
Ključne besede: aluminium, cutting fluids, production costs, turning
Objavljeno v DKUM: 01.06.2012; Ogledov: 1518; Prenosov: 111
.pdf Celotno besedilo (315,97 KB)
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14.
Characterization of cast Al86Mn3Be11 alloy
Tonica Bončina, Boštjan Markoli, Franc Zupanič, 2009, izvirni znanstveni članek

Opis: An Al86Mn3Be11 alloy cast into copper mould was subjected to metallographic investigation. The as-cast microstructure consisted of a quasicrystalline icosahedral phase (i-phase), Be4AlMn phase and, occasionally, a hexagonal phase. Al-rich solid solution represented the dominant phase. The chemical compositions of phases were determined using AES. The composition of the Be4AlMn slightly deviated from the stoichiometric composition, whereas the composition of the i-phase was approximately Al52Mn18Be30, containing an appreciable amount of Be. The average composition of the hexagonal phase was Al66Mn21Be13. Deep etching and particle extraction provided a deep insight into the three-dimensional morphology of the i-phase and the hexagonal phase, whereas Be4AlMn was slightly attacked by the etchant. The i-phase was present predominantly in the form of dendrites and a rodlike eutectic phase. The hexagonal phase was primarily in the form of hexagonal platelets, whereas Be4AlMn was rather irregular in shape. The morphology of the i-phase can be explained by predominant growth in 3-fold directions and the lowest energy of the 5-fold planes, leading to the faceting and adopting a pentagonal dodecahedron shape. The brightnesses of phases in the backscattered electron images were rationalized by determining their backscattering coefficients. TEM investigation showed considerable phason strain in the i-phase, and the polycrystalline nature of the Be4AlMn phase.
Ključne besede: aluminium alloys, deep etching, metallography, particle extraction, quasicrystal
Objavljeno v DKUM: 31.05.2012; Ogledov: 2219; Prenosov: 95
URL Povezava na celotno besedilo

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