Residual stress measurement in Al/steel joint produced by magnetic pulse welding
Al/steel welding introduces some metallurgical challenges due to the dissimilarity of materials. High-speed impact welding (HSIW) techniques become promising candidates to produce good quality dissimilar joints. Our previous study at ILL (Proposal 1-02-212) helped to understand the residual stresses (RS) near the Al/steel interface produced by friction melt bonding (FMB). Original findings were disseminated in scientific communications. However, HSIW is completely different from FMB in terms of process and mechanism of weld formation. The welding occurs at a speed of 200 - 400 m/s that causes extremely high strain rate deformation of workpieces. Since, the weld formed via a strong collision, RS in the workpieces are expected to be significantly high and the interface could have very large magnitude of RS. However, there is no data currently available to provide some fundamental insight on RS in impact welded joints. We believe that neutron diffraction measurement is the most appropriate to measure the macroscopic RS to shed light on the understanding of the global and local RS in impact welds, that can facilitate further implementation of the technique in industrial application.
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Thaneshan SAPANATHAN; AVETTAND-FENOEL Marie-Noelle; DREZET Jean-Marie; PIRLING Thilo; RACINEUX GUILLAUME and Aude Simar. (2019). Residual stress measurement in Al/steel joint produced by magnetic pulse welding. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-04-163
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