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IE-OPIM Joint Seminar 25 February 2015 at 13.40 at FENS G035

Severe plastic deformation of metallic materials by equal channel angular swaging

By Dr.-Ing. Mehmet Okan Görtan

Ultrafine-grained (UFG) metals produced by severe plastic deformation (SPD) processes are distinguished with many outstanding mechanical properties such as a combination of high strength and ductility or improved fatigue behavior and thus can be used to meet the high strength requirements of the metal forming industry. However, due to the costly production, the industrial utilization of such materials is still in an early stage. To overcome the efficiency problems of current SPD methods, a new process, called “Equal Channel Angular Swaging” has been proposed which is based upon the combination of the conventional ECAP and the incremental bulk metal forming method of infeed rotary swaging.

In the current study, mechanics of the ECAS process is investigated by using slip line field approach. Derived formulas are validated with model experiments. These first experiments prove the feasibility of ECAS process. The deformation of round bars from two different materials, commercially pure copper and low carbon steel was possible. The materials deformed by ECAS process are distinguished by an increased tensile strength compared to their as-received state. Moreover, microstructural investigations reveal that an average grain size under 1 µm can be achieved even after a single pass with the developed SPD process.

Dr.-Ing. Mehmet Okan Görtan




Istanbul (Erkek) Lisesi



Istanbul Technical University

B.Sc. in Mechanical Engineering


Istanbul Technical University

M.Sc. in Mechanical Engineering


Yokohama National University

Short time exchange program


Institute for Production Engineering and Forming Machines/Technische Universität Darmstadt

Doctoral studies in the field of “Severe Plastic Deformation”


Work Experience


Head of Department „Process Chains and Forming Units“

Institute for Production Engineering and Forming Machines



“ICFG International Paper Prize 2013” with the paper

Forming of severe plastic deformed wires by cold extrusion


Additional Information

Three granted research projects with an estimated total value of 725,000.00 €.

Two book chapters, five peer-reviewed journal papers, nine conference papers and presentations, four non-reviewed papers