Investigations on metallurgical and mechanical properties of resistant spot welded dissimilar joints between a high manganese steel and a low alloyed steel grade

Abstract

Abstract The present investigation gives a brief overview into the correlation of the amount of molten ferrite and metallurgical as well as mechanical properties of resistance spot welded austenitic-ferritic joints. The fusion rate describes the ferritic quantity in the weld metal and provides a reliable reference to the integrity of dissimilar joints. Metallurgical effects due to varied fusion rates are shown by element distribution, micro hardness measurement and phase analysis. In addition, this work states specific fusion rates which lead to a degradation of the mechanical properties and can be used as a basis for application guidelines. This can be seen in certain tensile tests with single and multiple spot specimens.