A study on similar and dissimilar linear friction welds of 2024 Al alloy and 2124Al/SiCP composite

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Citations (Scopus)

Abstract

The aim of the present work is to evaluate the possibility of using the Linear Friction Welding (LFW) technique to produce similar and dissimilar joints between a 2024 Al alloy and a 2124Al/25vol.%SiCP composite. In this solid state joining process the bonding of two flat edged components is achieved through frictional heating induced by their relative reciprocating motion, under an axial compressive force. Microstructural characterization of the welds was carried out by optical and scanning electron microscopy, to investigate the effect of LFW both on the aluminium alloy matrix and the reinforcement particles. The mechanical behaviour of the welded specimens was studied by means of hardness and tensile tests. The mechanisms of failure were investigated by SEM analyses of the fracture surfaces. LFW joints in MMCs resulted substantially defect free, with a uniform particle distribution, while a partial lack of bonding at the corners was observed in the others welds. The hardness decreased by approximately 10% in the welded zone, with some data fluctuations due to the complex microstructural modifications introduced by the LFW process. The joint efficiency, evaluated in respect to the UTS, was 90% for the Al alloy joints and 80% for the MMC joints. A decrease in the elongation to failure was measured in all the LFW specimens, probably related to the orientation of the plastic flow in the TMAZ, where the fracture generally occurred.

Original languageEnglish
Title of host publicationTHERMEC 2009 Supplement
Pages461-466
Number of pages6
Volume89-91
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin, Germany
Duration: 25 Aug 200929 Aug 2009

Publication series

NameAdvanced Materials Research
Volume89-91
ISSN (Print)1022-6680

Conference

Conference6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
Country/TerritoryGermany
CityBerlin
Period25/08/0929/08/09

Keywords

  • Hardness
  • LFW
  • Linear friction welding
  • Mechanical properties
  • Metal matrix composites
  • Microstructure
  • MMC
  • Tensile test

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