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LIPSS for metal forming tools

From ecological and economic points of view, alternatives to conventional lubricants in metal forming are of great interest. The focus is on tools' surface functionalization by laser‐induced periodic surface structures (LIPSS). These structures must be protected due to their loss when in direct tribological contact. So a laser‐ based process chain has been developed using pulsed and continuous laser processes to create dimples and retain the hydrophilic properties of the LIPSS, as contact angles of 14° prove.