Adjustment of Friction by Duplex-Treated, Bionic Structures for Sheet-Bulk Metal Forming

Tillmann, W.1, a; Stangier, D.1, b; Lopes-Dias, N.-F.1, c; Biermann, D.2, d; Krebs, E.2, e

Lehrstuhl für Werkstofftechnologie LWT, Technische Universität Dortmund, Leonhard-Euler-Str. 2, 44227 Dortmund
Institut für Spanende Fertigung, Technische Universität Dortmund, Baroper Str. 303, 44227 Dortmund

a); b); c); d); e)


Bionic structures were applied on hardened AISI M3:2 and duplex-treated by means of plasmanitriding. Subsequently, a thin hard CrAlN coating was deposited on the substrate. The tribological properties of the structure systems were investigated in the full contact area, using identical friction partners (steel DP 600) of the forming process. The tribological behavior was analyzed in fundamental laboratory tests, using a modified tribometer and subsequently evaluated in application-orientated adapted ring-compression tests. Bionic structures are suitable to locally adjust the friction condition and proved to be an appropriate method to control the material flow of sheet metals in bulk forming operations. However, process related micro burrs lead to a roughness increase during subsequent treatments, thus increasing the friction and adhesive effects.


Bionically-inspired structures, Sheet-bulk metal forming, PVD-duplex treatment, Friction


Tribology International, 111 (2017), S. 9-17, ISSN , doi: 10.1016/j.triboint.2017.02.037