Narodna in univerzitetna knjižnica, Ljubljana (NUK)
Naročanje gradiva za izposojo na dom
Naročanje gradiva za izposojo v čitalnice
Naročanje kopij člankov
Urnik dostave gradiva z oznako DS v signaturi
  • Microstructures of the Al-Fe-Cu-X alloys prepared at various solidification rates = Mikrostruktura zlitin Al-Fe-Cu-X po različnih hitrostih strjevanja
    Voděrová, Milena ...
    Aluminium alloys are usually prepared with conventional casting, but rapid-solidification methods lead to the alloys with better mechanical properties or thermal stability. When an improved thermal ... stability is required, aluminium is alloyed with one or more of the elements from the group of transition metals (TM), for example, Ni, Fe, Cr or Ti. These elements are characterized by a low diffusivity and solubility in aluminium even at elevated temperatures, while Cu in an alloy forms a CuAl2 phase that enables precipitation hardening. In this work, the microstructures of the Al-7Fe-4Cu, Al-4Fe-4Cu-3Ni and Al-7Fe-4Cu-3Cr (mass fraction, w/%) alloys prepared with various solidification processes were investigated. The aim of this work was to determine the changes in the microstructure caused by the increasing solidification rate and to determine the influence of the copper present in each alloy. All the samples were prepared with single-roll melt spinning, water quenching of the melt and conventional casting. The microstructures of the alloys were studied with light and scanning electron microscopy (SEM). The phase composition was determined with X- ray diffraction (XRD). Vickers hardness (HV 5) and microhardness (HV 0.005) were measured to compare the mechanical properties of the alloys. The microstructure and the hardness of the alloys strongly depended on the solidification rate. The fine microstructure and high microhardness values obtained with melt spinning are promising for the use of these alloys in special applications at elevated temperatures.
    Vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 48, št. 5, sep.-oct. 2014, str. 771-775)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2014
    Jezik - angleški
    COBISS.SI-ID - 1097386

vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 48, št. 5, sep.-oct. 2014, str. 771-775)

loading ...
loading ...
loading ...