Header menu link for other important links
X
Transformation of cast A356 ingots to wrought sheets with enhanced mechanical and tribological properties by different thermo-mechanical processing routes
R. J. Immanuel,
Published in Elsevier Ltd
2016
Volume: 101
   
Pages: 44 - 55
Abstract
The dendritic microstructure with non-uniform distribution of hard second phase particles degrades the mechanical and tribological properties of Al. Si alloys. Severe plastic deformation methods are found effective in refining microstructure and enhancing the material properties. In our present study, two different thermo-mechanical processing routes were employed on a cast hypo-eutectic Al. Si alloy to produce wrought sheets with refined microstructure. In one processing route, the material is subjected to cryorolling after solution treatment and in the other route, the material is subjected to a thermal-treatment between solution treatment and cryorolling. Cryorolling imposes severe plastic deformation onto the material resulting in refinement and redistribution of second phase particles leading to enhanced strength and ductility. Cryorolling with pre-roll thermal-treatment resulted in finer grain structures than the material without thermal-treatment. The tribological behaviour of processed materials are studied and compared with the base materials by pin-on-disk method. Maximum wear resistance is observed in thermal-treated material followed by cryorolled material with pre-roll thermal-treatment. Transformation from adhesion wear to oxidative-delamination wear is found to be the primary reason for the enhanced wear resistance in thermal-treated material. The various wear mechanisms involved are explained in detail based on the microstructural evolution and mechanical properties. © 2016 Elsevier Ltd.
About the journal
JournalData powered by TypesetMaterials and Design
PublisherData powered by TypesetElsevier Ltd
ISSN02641275
Open AccessNo
Concepts (16)
  •  related image
    Aluminum
  •  related image
    Delamination
  •  related image
    Heat treatment
  •  related image
    Mechanisms
  •  related image
    Metal castings
  •  related image
    Microstructure
  •  related image
    Plastic deformation
  •  related image
    Silicon alloys
  •  related image
    Thermomechanical treatment
  •  related image
    Tribology
  •  related image
    Cryo-rolling
  •  related image
    DELAMINATION WEAR
  •  related image
    SEVERE PLASTIC DEFORMATIONS
  •  related image
    Sliding wear
  •  related image
    ULTRAFINE GRAINED MATERIALS
  •  related image
    Wear resistance