VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Microstructure analysis of the remelted layer after laser remelting of various aluminium alloys
    Grum, Janez, 1946- ; Božič, Slavko, 1971-
    ǂThe ǂpaper treats microstructures of aluminium-silicon alloys after casting and the influence of laser hardening by remelting on the changes in microstructure and hardness of a modified surface ... layer. Our aim was to monitor changes in the thin, remelted surface layer of a sample material in the form of thin plates with regard to remelting conditions. The cooling conditions are very important since, at higher cooling rates, it is possible to achieve an ever finer distribution of silicon in the matrix, i.e. in the solid solution of aluminium and silicon. Hardening of the thin surface layer may be influenced by: as fine as possible distribution of the silicon particles in the oversaturated solid solution of aluminium and silicon with other alloying elements; as fine as possible and uniform distribution of intermetallic compounds. Regarding the nature of laser remelting process, in which there is a melt pool, which mixes due to hydrodynamic and electromagnetic forces, around the laser beam, a rather homogeneous melt and, after rather rapid cooling, quite uniform hardness in the remelted specimen layer may be established. All these findings confirm the conclusion that laser hardening by remelting of the thin surface layer of the aluminium alloys is a quality and up-to-date process ensuring a harder surface and maintaining tough core.
    Vir: Zbornik radova = Proceedings (Str. 145-153)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2000
    Jezik - angleški
    COBISS.SI-ID - 3931675

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