Production Engineering

, Volume 13, Issue 2, pp 169–180 | Cite as

Investigations on residual stress generation in full-forward-extrusion

  • Philipp LandkammerEmail author
  • Andreas Jobst
  • Christoph Kiener
  • Paul Steinmann
  • Marion Merklein
Production Process


Within cold-forming processes, the influence of forming induced residual stresses is a critical issue regarding the life-time behaviour of the formed components. However, a targeted use of forming-induced residual stresses is also capable to improve the components properties. The rotation-symmetrical full-forward extrusion is used as a reference process to investigate the generation of residual stresses within manufacturing. A novel and generally applicable computational evaluation procedure is introduced, which achieves to compute and visualize the evolution of the residual stress state during the entire forming operation. Simulative results are compared with their experimental counterparts. The near-surface residual stresses in the formed component are evaluated in axial and tangential direction by X-ray diffraction. Indentation tests are used to determine the micro-hardness inside the components and optical instruments quantify geometrical differences.


Residual stresses Full-forward-extrusion Experimental validation Advanced post processing 



Our research activities are funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the scope of the priority program SPP2013 - Targeted Use of Forming Induced Residual Stresses in Metal Components in the subproject P10 (project number: 374688875).


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Copyright information

© German Academic Society for Production Engineering (WGP) 2019

Authors and Affiliations

  • Philipp Landkammer
    • 1
    Email author
  • Andreas Jobst
    • 2
  • Christoph Kiener
    • 2
  • Paul Steinmann
    • 1
  • Marion Merklein
    • 2
  1. 1.Institute of Applied MechanicsErlangenGermany
  2. 2.Institute of Manufacturing TechnologyErlangenGermany

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