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Toughness enhancement in roll-bonded Al6061-15 vol.% SiC laminates via controlled interfacial delamination

Monazzah, A. H ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1007/s11665-013-0626-8
  3. Publisher: 2013
  4. Abstract:
  5. Researchers have examined different approaches to improve damage tolerance of discontinuously reinforced aluminum (DRA). In this study, three-layer DRA laminates containing two exterior layers of Al6061-15 vol.% SiCp and an interlayer of Al1050 were fabricated by hot roll bonding. Interfacial adhesion between the layers was controlled by means of rolling stain. The results of shear test revealed that, the bonding strength of laminates was influenced by number of rolling passes. Considering this effect, the role of interfacial bonding on the toughness of laminates was studied under three-point bending in the crack divider orientation. The quasi-static toughness of the laminates was greater than that of the monolithic DRA. Plastic deformation of the ductile interlayer and interfacial delamination were found as the major sources of energy absorption in this fracture process. It was shown that interfacial adhesion in these laminate does not alter the initiation energy in quasi-static test. Propagation energy under same loading condition, however, illustrated significant sensitivity to the interfacial bonding. The results of the current study reveal that improving the interfacial adhesion by means of rolling strain eliminates the ease of plastic deformation of the ductile interlayer and thus reduces the contribution of this mechanism in quasi-static toughness of the laminate
  6. Keywords:
  7. Aluminum composite ; Laminate ; Plastic deformation ; Quasi-static testing ; Toughness ; Aluminum composites ; Interfacial adhesions ; Interfacial delamination ; Quasi-static toughness ; Reinforced aluminum ; Three point bending ; Toughness enhancement ; Adhesion ; Aluminum ; Delamination ; Ductile fracture ; Failure (mechanical) ; Silicon carbide ; Laminates
  8. Source: Journal of Materials Engineering and Performance ; Volume 22, Issue 11 , 2013 , Pages 3414-3420 ; 10599495 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs11665-013-0626-8