Laser welding of commercial titanium VT1-0 ASR, harde-ned by nitrogen - V. D. Sheljagin; Ja. Saenko; A. A. Polishko; V. A. Rjabinin; A. V. Bernatskij; A. N. Palagesha; S. N. Stepanjuk; I. N. Klochkov (Automatic Welding, 2015)