Nano-hardness of Electron Beam Irradiated Polyamide 11 Martin Ovsik, Lenka Hylova, David Manas, Miroslav Manas and Michal Stanek MATEC Web Conf., 76 (2016) 02030 Published online: 21 October 2016 DOI: 10.1051/matecconf/20167602030