Mechanical and microstructural characterization of 2124Al/25 vol.%SiC p joints obtained by linear friction welding (LFW)

F. Rotundo, L. Ceschini, A. Morri, T. S. Jun, A. M. Korsunsky

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50 Citations (Scopus)

Abstract

The aim of this study is to evaluate the possibility of using the linear friction welding (LFW) technique to produce sound joints on a 2124Al/25 vol.%SiCp composite. The MMC joints were subjected to microstructural and mechanical characterization, including hardness, tensile and fatigue tests, without any post-weld heat treatment. The microstructural analyses showed substantially defect-free joints, with a uniform particle distribution in the central zone and a relevant plastic flow of the aluminium matrix alloy. The hardness decrease in the welded zone was approximately 10% in respect to the base material. The joint efficiency was higher than 80%, both in respect to the ultimate tensile strength and fatigue strength at 107 cycles. S-N probability curves were calculated using the maximum likelihood method. Generally, the fracture occurred in the Thermo-Mechanically Affected Zone (TMAZ), with a relevant reduction in the elongation to failure.

Original languageEnglish
Pages (from-to)1028-1037
Number of pages10
JournalComposites Part A: Applied Science and Manufacturing
Volume41
Issue number9
DOIs
Publication statusPublished - Sep 2010
Externally publishedYes

Keywords

  • A. Metal-matrix composites (MMCs)
  • B. Mechanical properties
  • B. Microstructures
  • E. Linear friction welding (LFW)

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