ASPECTS REGARDING FRICTION STIR PROCESSING IN TWO WORKING MEDIUMS OF EN AC 5083 CAST ALUMINUM ALLOY. - Boţilă, Lia-Nicoleta; Perianu, Ion-Aurel; Duma, Iuliana; Mnerie, Gabriela-Victoria (Nonconventional Technologies Review / Revista de Tehnologii Neconventionale, 2026)