"The quality assurance of friction welded connections sometimes differs from the regulations and recommendations for other welding processes. For this reason, all suitable means of quality assurance for friction welding are pointed out. The test procedures are described in order to provide a basis for decision-making as far as possible."
1989DVS 2909-1-1989 Friction welding of metallic materials; procedures, terms, materials
1984DVS 2909-5-1984 Friction welding with metallic materials; quality assurance and list of concepts including explanations
DVS 2909-5-1984 Friction welding with metallic materials; quality assurance and list of concepts including explanations was changed to DVS 2909-1-1989 Friction welding of metallic materials; procedures, terms, materials.
DVS 2909-5-1984 Friction welding with metallic materials; quality assurance and list of concepts including explanations was changed to DVS 2909-3-1994 Friction welding quality assurance of metallic materials and friction welding practice feature set.