• The hot spot in Al-rod extrusion investigated by FEM-analysis 

      Valberg, Henry Sigvart; Lefstad, Martin; Costa, André L. M. (Peer reviewed; Journal article, 2019)
      FEM-analysis is applied to study thermo-mechanical conditions in an industrial Al-rod extrusion process using long billets as stock material. In the analysis, focus is on the conditions in the hot spot present inside the ...
    • On the mechanism of formation of back-end defects in the extrusion process 

      Valberg, Henry Sigvart; Lefstad, Martin; de Moraes Costa, André Luiz (Peer reviewed; Journal article, 2020)
      FEM-analysis is applied to study metal flow in aluminum extrusion with focus on how material flow defects form when the last part of the billet is extruded through an axisymmetric die. First, an overview is given of the ...