Investigation on microstructure and mechanical properties in explosive welded Mo-Cu/Cu interface

This study successfully joined the Mo-Cu and Cu plates via a solid-state explosive welding process. As a result, while the joined metals maintained their prebonded properties without forming cracks and voids, they recorded a maximum shear strength of 252.1 MPa and an average nanohardness of 4.50 GPa at the interface of the joined metal. Subsequently, electron backscattered diffraction (EBSD) analysis, scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS) analytical system, shear, and nanoindentation measurements were conducted to characterize the new metal further. Investigations suggested the formation of a laminated composite with severe and irregular plastic deformation, including a recovery-recrystallization at the interface of the joined metal. & COPY; 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

This study successfully joined the Mo-Cu and Cu plates via a solid-state explosive welding process. The joined metals maintained their prebonded properties without cracks and voids, and exhibited a maximum shear strength of 252.1 MPa and an average nanohardness of 4.50 GPa at the interface. Further characterization using EBSD, SEM, EDS, shear, and nanoindentation measurements revealed the formation of a laminated composite with severe and irregular plastic deformation at the interface.