Direct testing of scale effects in metal forming friction and lubrication

Peter Søe Nielsen, Matteo Calaon, Nikolas Aulin Paldan, Niels Bay

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Downscaling of metal forming operations from macro to micro scale implies significant changes caused by size effects, among these the friction increase, which has been reported by researchers using indirect test methods such as ring-compression test and double-cup-extrusion test. In the present work a new test equipment is developed for direct friction measurements in the range from macro to micro scale. Investigations confirm a significant friction increase when downscaling. Visual inspection of the work pieces show this to be explained by the amount of open and closed lubricant pockets.
Original languageEnglish
Title of host publicationTribology of Manufacturing Processes
Number of pages917
Publication date2010
ISBN (Print)978-2-911256-27-1
Publication statusPublished - 2010
Event4th International Conference on Tribology in Manufacturing Processes - Nice, France
Duration: 13 Jun 201015 Jun 2010
Conference number: 4


Conference4th International Conference on Tribology in Manufacturing Processes
Internet address


  • Lubrication
  • Friction
  • Micro forming
  • Size effects

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