![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Summary
Instrumented Charpy impact testing was carried out at various temperatures from −196 °C to 200 °C in order to clarify the absorbed energies, impact values, transition temperatures and fracture behaviour at the weld interface of SCM415/SCM415 friction welded joints; the results were examined and compared with the impact properties of the base metal. The results may be summarised as follows:
-
The impact energy transition curve of the weld interface in the transition region shifted to the lower temperature side in comparison with that of the base metal.
-
The impact energy transition temperature was approximately 30 °C at the weld interface and approximately 57 °C for the base metal; these temperatures were consistent with the temperatures estimated from the impact fracture surface.
-
Resistance to crack initiation at the weld interface in the transition region increased markedly in comparison with that of the base metal.
-
Impact resistance at the weld interface under the friction welding conditions employed in this experiment largely exceeded that of the base metal.