Numerical simulation of linear fiction welding (LFW) processes

Livan Fratini, Dario La Spisa

Research output: Contribution to conferenceOther

8 Citations (Scopus)

Abstract

Solid state welding processes are becoming increasingly important due to a large number of advantages relatedto joining “unweldable” materials and in particular light weight alloys. Linear friction welding (LFW) has been usedsuccessfully to bond non-axisymmetric components of a range of materials including titanium alloys, steels, aluminumalloys, nickel, copper, and also dissimilar material combinations. The technique is useful in the research of quality of thejoints and in reducing costs of components and parts of the aeronautic and automotive industries.LFW involves parts to be welded through the relative reciprocating motion of two components under an axial force. Insuch process the heat source is given by the frictional forces work decaying into heat determining a local softening of thematerial and proper bonding conditions due to both the temperature increase and the local pressure of the two edges to bewelded. This paper is a comparative test between the numerical model in two dimensions, i.e. in plane strain conditions,and in three dimensions of a LFW process of AISI1045 steel specimens. It must be observed that the 3D model assures afaithful simulation of the actual threedimensional material flow, even if the two-dimensional simulation computationaltimes are very short, a few hours instead of several ones as the 3D model. The obtained results were compared withexperimental values found out in the scientific literature.
Original languageEnglish
Pages1284-1289
Number of pages6
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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