Lubricant-free deep drawing using CO2 and N2 as volatile media injected through laser-drilled microholesEhsan Zahedi, Christoph Woerz, Gerd Reichardt, Georg Umlauf, Mathias Liewald, Jakob Barz, Rudolf Weber, Daniel J. Foerster and Thomas GrafManufacturing Rev., 6 (2019) 11DOI: https://doi.org/10.1051/mfreview/2019011
