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Title: The effect of laser radiation on the residual stress levels of Single Point Incrementally Formed (SPIF) parts
Authors: Mohammadi, Amirahmad
Vanhove, Hans
Van Bael, Albert
Seefeldt, Marc
Duflou, Joost
Issue Date: 17-Feb-2014
Publisher: BIAS Verlag
Host Document: Proc. 4th International Workshop on Thermal Forming and Welding Distortion (IWOTE’14) pages:83-92
Conference: IWOTE'14 location:BIAS Bremer Institut für angewandte Strahltechnik, Bremen, Germany date:09-10 April 2014
Abstract: The present paper shows a new approach for stress relief annealing of SPIF formed
parts using a defocused laser beam as a heating source. By offering a short-time heat
treatment cycle, this process can be applied in the same set-up used for laser assisted
single point incremental forming (LASPIF). A pyramid-shaped part has been selected
as a case study and a proper power density and scanning velocity for the LASPIF
process and the post heat treatment have been determined using a three-dimensional
transient heat transfer model. The thermal simulation results have been validated by
means of IR camera temperature field measurements and the pyramidal part has been
processed based on the selected process parameters. The residual stress levels of
laser treated parts have been measured at different locations along the pyramid wall
and compared with those of the LASPIF and the cold processed SPIF parts. The
geometrical accuracy results confirmed that no unwanted laser forming occurred due to
the annealing treatment and X-ray diffraction (XRD) measurements revealed that the
laser beam can be effectively used for stress relief annealing and removal of the effects
of strain hardening on the SPIF parts.
ISBN: 978-3-933762-48-1
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Production Engineering, Machine Design and Automation (PMA) Section
Materials Technology TC, Technology Campus Diepenbeek
Technologiecluster Materialentechnologie
Structural Composites and Alloys, Integrity and Nondestructive Testing
Centre for Industrial Management / Traffic & Infrastructure

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