Evaluation of Microstructural and Mechanical Behavior of AHSS CP780 Steel Welded by GMAW-Pulsed and GMAW-Pulsed-Brazing Processes

Joints of complex phase 780 (CP-780) advanced high strength steel (AHSS) were carried out by using an ER-CuAl-A2 filler metal for the gas arc welding pulsed brazing (GMAW-P- brazing) process and ER-80S-D2 GMAW-P employing two levels heat input. The phases in weld bead HAZ analyzed, evaporation zinc means scanning electron microscopy (SEM) was also monitored. mechanical properties welded joints evaluated tension, microhardness vertical impact tests. It found that there greater surface Zn with as compared to GMAW-P-brazing process. best results tensile observed process, which increased ~68% respect those GMAW-P. This behavior can be attributed formation intermetallic compound Cu-Al-Fe fusion line.