Challenges and opportunities to develop the method of joining dissimilar material aluminium-steel by using Rotational Friction Welding (RFW)Akhmad Rasyid, Rachmat Hidayatullah, Priyo Adiwibowo and Indra SiregarE3S Web Conf., 513 (2024) 02004DOI: https://doi.org/10.1051/e3sconf/202451302004