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Microstructure and mechanical properties of Al-20Si-5Fe-2X (X = Cu, Ni, Cr) alloys produced by melt-spinning

Rajabi, M ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1016/j.msea.2008.03.047
  3. Publisher: 2008
  4. Abstract:
  5. Al-20Si-5Fe-2X (X = Cu, Ni and Cr) ribbons were produced by melt-spinning and consolidated by hot pressing at 400 °C for 60 min. The microstructure of the ribbons and the consolidated alloys was investigated using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffractometry (XRD) method, and transmission electron microscopy (TEM). The hardness and compressive strength of the specimens at ambient and elevated temperatures were examined. The microstructure of the ribbons exhibited featureless and dendritic zones. Results of XRD and TEM showed formation of spherically shaped Si particles with an average diameter of 20 nm. Ultrafine Si (110-150 nm) and iron-containing intermetallic particles were noticed in the microstructure of the consolidated ribbons. An improved strength was achieved by alloying of Al-20Si-5Fe with Cu, Ni, and Cr. Nickel was found to be the most effective element in increasing the maximum stress, particularly at elevated temperatures. © 2008 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Alloys ; Aluminum ; Chromium ; Compressive strength ; Copper ; Copper alloys ; Hot pressing ; Ice ; Imaging techniques ; Iron ; Iron alloys ; Lithography ; Mechanical properties ; Metallic compounds ; Microstructure ; Nickel ; Nickel alloys ; Optical microscopy ; Silicon ; Silicon alloys ; Strength of materials ; Stresses ; X ray analysis ; X ray diffraction analysis ; Average diameter ; Electron microscopy (TEM and SEM) ; Elevated temperatures ; Intermetallic particles ; Maximum stress ; Melt spinnings ; Optical (PET) (OPET) ; Si particles ; Strength (IGC: D5/D6) ; Ultrafine (CO) ; X-ray diffractometry (XRD) ; Microcrystalline silicon
  8. Source: Materials Science and Engineering A ; Volume 492, Issue 1-2 , 2008 , Pages 443-449 ; 09215093 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0921509308003699