IOP IOP Conference Series: Materials Science and Engineering. -- Vol. 1256 (2022), Annual Session of Scientific Papers - IMT Oradea, 07.07. - 08.07. 2022, Oradea, Romania. -- ISSN : 1757-8981. In: IOP Conference Series: Materials Science and Engineering. -- ISSN 1757-8981. -- IOP Publishing : Bristol, Veľká Británia.