Effects of thermal distribution strategy on a Ti-6Al-4V/304L dissimilar joint fabricated using the variable polarity cold metal transfer arc-brazing method

Process stability and forming accuracy on wire arc additive manufactured Al–Zn–Mg–Cu alloy with different electrode positive/electrode negative ratios of CMT advance process

“…The EP/EN ratio is the key process parameter in the CMT advance process, which affected welding current/arc voltage waveforms, arc/metal transfer behaviours, molten pool flow, and heat input. The effect of the EP/EN ratio on the microstructure and related mechanical properties of weld joints was studied [11][12][13]. Wang et al [12] welded the Mg/Al dissimilar metal with different EP/EN ratios, and the thickness of the intermetallic compounds (IMCs) layers was reduced with decreased EP/EN ratio from 4:1 to 1:4.…”

“…As a response, the tensile strength had a significant improvement due to the thinning IMCs layer. The Ti-6Al-4V/304L dissimilar joints with different EP/EN ratios were investigated by Mou et al [13], a low ( ≤ 1:4) or high ( ≥ 4:1) EP/EN ratio caused a thin or thick Ti-6Al-4 V/seam transition zone, which was both harmful to the tensile strength of joints. The effect of EP/EN ratio on the WAAM process was also investigated by Scotti et al [14,15].…”

Joining mechanism evolution of fusion welded TC4 titanium alloy/304 stainless steel dissimilar joint by GTAW

“…The composition of intermetallic compounds in the Ti/Cu interface region is the key factor affecting the mechanical properties of titanium/steel fusion welding joints, and the welding heat input is the main parameter affecting the formation of intermetallic compounds in heterogeneous metal joints. Mou et al [22][23][24] studied the interfacial microstructure evolution of titanium/steel CMT joints under different energy inputs and axial magnetic field conditions. Under medium heat input conditions, the tensile strength of the joint reached 294 MPa.…”