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Influence of hard inclusions on microstructural characteristics and textural components during dissimilar friction-stir welding of an PM Al–Al2O3–SiC hybrid nanocomposite with AA1050 alloy

Khodabakhshi, F ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1080/13621718.2016.1251714
  3. Publisher: Taylor and Francis Ltd , 2016
  4. Abstract:
  5. Owing to the advantages of nanocomposites for structural applications, we present microstructural evolutions and texture development during dissimilar friction stir welding (DFSW) of an Al-matrix hybrid nanocomposite (Al-2 vol.-% Al2O3-2 vol.-% SiC) with AA1050. It is shown that DFSW can successfully be performed at a rotating speed of 1200 rev min−1 and a transverse speed of 50 mm min−1 while locating the nanocomposite at retreating side. Formation of macro-, micro-, and nano-mechanical interlocks between dissimilar base materials (BMs) as a result of FSW tool stirring action possessed an impact influence on the mechanical performance of dissimilar welds. Electron microscopy revealed formation of a three-modal grain structure from microscale (>1 µm) to nanoscale (<100 nm) range in the stir zone of the joint materials. Texture components included a mixture of (Formula presented.) shear elements and ideal (Formula presented.) random orientations, as compared to the completely random and Cu-P preferred textures for the aluminum and composite BMs
  6. Keywords:
  7. Aluminium matrix nanocomposite ; Crystallographic texture ; Friction ; Friction stir welding ; Matrix algebra ; Microstructure ; Nanocomposites ; Research laboratories ; Silicon carbide ; Tribology ; Welding ; Aluminium matrix ; Commercial pure aluminium ; Crystallographic textures ; Dissimilar friction stir welding ; Hybrid nanocomposites ; Mechanical performance ; Micro-structural characteristics ; Structural applications ; Aluminum
  8. Source: Science and Technology of Welding and Joining ; 2016 , Pages 1-16 ; 13621718 (ISSN)
  9. URL: http://www.tandfonline.com/doi/full/10.1080/13621718.2016.1251714