Plastic deformation and fragmentation of single-crystal pure copper during friction stir welding - Chumaevskii, Andrey V.; Tarasov, Sergey Yu; Lychagin, Dmitry V.; Moskvichev, Evgeny N.; Zykova, Anna P.; Gusarova, A. V.; Gurianov, D. A.; Kalashnikova, T. A. (AIP Conference Proceedings)