Liquid-phase impact diffusion welding of SiCp/6061Al and its mechanism

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Wei Guo
  • Meng Hua
  • Hang Wai Law
  • John Kin Lim Ho

Detail(s)

Original languageEnglish
Pages (from-to)427-437
Journal / PublicationMaterials Science and Engineering A
Volume490
Issue number1-2
Publication statusPublished - 25 Aug 2008

Abstract

Liquid-phase impact diffusion welding (LPIDW) technique was used to join the aluminum matrix composite SiCp/6061Al. The composite joints welded successfully, gave tensile strength up to 260 MPa and radial deformation below 3%. Analysis of the microstructure and tensile strength of the welded joints showed: (i) the achievement of prominent joint interface between SiC particles and the matrix; (ii) the change of pernicious contact-state from reinforcement (SiC)/reinforcement (SiC) to reinforcement (SiC)/matrix/reinforcement (SiC) of the reinforcement particles; (iii) the disappearance of the harmful microstructure/brittle phase of Al4C3 from the welded joint; (iv) the density of dislocation in the matrix next to the interface being higher; (v) the sign of intensively mutual entwisting of dislocation; and (vi) the deformation mainly taking place in the matrix grain. Furthermore, the rapid thermal pressing offered a denser nucleus area for matrix crystal and their deforming matrices around SiC particles engendered intensive aberration, which was favorable for forming nano-grains and for improving the properties of the welded composite joints. © 2008 Elsevier B.V. All rights reserved.

Research Area(s)

  • Aluminum matrix composite, Liquid-phase impact diffusion welding, Powder metallurgy, SiCp/6061Al

Citation Format(s)

Liquid-phase impact diffusion welding of SiCp/6061Al and its mechanism. / Guo, Wei; Hua, Meng; Law, Hang Wai; Ho, John Kin Lim.

In: Materials Science and Engineering A, Vol. 490, No. 1-2, 25.08.2008, p. 427-437.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review