A review on heat affected zone softening of dual-phase steels during laser welding

The usage of dual-phase (DP) steels in the production of laser-welded blanks in the automotive industry is of critical importance to the progression of passenger safety and crashworthiness of modern vehicles while at the same time pushing for weight savings to improve the fuel efficiency of these cars. DP steels have been in use for over four decades. During their first introduction into the automotive industry, the steels had limited use for …