Experimental Studies of Different Strength Steels MIG Brazed Joints

Abstract

Nowadays the stakeholders of vehicle industry are focusing on making materials and technologies for motor-vehicle bodies that satisfy the newest requirements. Reduction of the manufactured vehicle's dead load – while the important material properties of proper functioning only change in a small degree – is such a requirement. There exist many solutions to satisfy this requirement. One of them is when the materials are in the same group, but the material with higher strength is used with less thickness. Reducing mass should be searched in recent high strength steels. Evidently, to reduce dead load, manufacturers use steels with different strength, depending on the function of the given structural component. The advantages of steels with increased strength is the reduced cost of manufacturing and to make the hybrid material couplings cheaper as well. However, malleability is one of the key issues of manufacturing body components, so common use of basic and increased strength steels is necessary. The connection between the standard (DC) and increased strength (DP) steels design is one way for the binding established by brazing, which has several advantages over welding. In this paper MIG brazing is formed between the DC-DP steel pairs and examine changes in the surface properties and the interfacial layer. The results shows there are differences between the DC and DP side of the joint.

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

“…Berczeli et al studied the mechanical behavior of dissimilar welds between a zinc-coated DP 600 steel and DC 01 steel, with a CuSi 3 electrode. The authors found that there is a maximum in the hardness profile at the edge of the DP-600 steel and the CuSi 3 welding material [12]. Singh et al evaluated the CMT welding process for lap joining of zinc-coated DP-780 steel with a CuAl 10 Fe filler wire and observed that the heat input increased the concentration of intermetallic compounds from 13.9% to 15.6% [13].…”

Generic bifurcations in fractional thermo‐mechanics with peridyamic effects

“…Non‐locality (in space) appears in a generalized fractional strain. Instability problems are often coupled with spontaneous crack formation . Such problems are successfully treated by using fractional stress derivative in peridynamics .…”