Electron Beam Welding of 2099-T83 Aluminium-lithium Alloy Thick Plates Jozef Bárta, Beáta Simeková, Milan Marônek and Mária Dománková MATEC Web Conf., 269 (2019) 02010 Published online: 22 February 2019 DOI: 10.1051/matecconf/201926902010