Interfacial Microstructure and Strength of Steel to Aluminum Alloy Lap Joints Welded by a Defocused Laser Beam

4.1 Formation mechanism of the IMC layer at the weld interface during defocused laser beam welding The interrupted welding method adopted in the present study was useful

Keywords: defocused laser beam welding, low carbon steel, aluminum alloy, weld interface, intermetallic compound, transmission electron microscope, energy dispersive X-ray

Figure 4-7: Average energy at failure evolution over surface roughness for 1.3 mm adherend thickness. Figure 4-8: Average energy at failure evolution over surface roughness for 2.1

In the present work, the microstructure and mechanical properties of a thick plate of Q690 steel welded by the metal active gas (MAG) welding DSDAW process without

3A higher compressive residual stress layer which depth was close to 900 ;m and the maximum value was - 285 MPa was introduced on the near surface of 2A12 aluminum alloy welded