Interfacial microstructure and mechanical properties of brazed aluminum / stainless steel - joints

19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium

Fedorov, V.^1 ; Elßner, M.^1 ; Uhlig, T.^1 ; Wagner, G.^1

Institute of Materials Science and Engineering, Chemnitz University of Technology, Chemnitz

09125, Germany^1

关键词: Brazed aluminum;    Elevated temperature;    Fracture surfaces;    Fusion welding;    Induction brazing;    Interfacial microstructure;    Lower temperatures;    Tensile shear test;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012009/pdf
DOI  :  10.1088/1757-899X/181/1/012009

来源: IOP

【 摘 要 】

Due to the demand of mass and cost reduction, joints based on dissimilar metals become more and more interesting. Especially there is a high interest for joints between stainless steel and aluminum, often necessary for example for automotive heat exchangers. Brazing offers the possibilities to manufacture several joints in one step at, in comparison to fusion welding, lower temperatures. In the recent work, aluminum / stainless steel - joints are produced by induction brazing using an AlSi10 filler and a non-corrosive flux. The mechanical properties are determined by tensile shear tests as well as fatigue tests at ambient and elevated temperatures. The microstructure of the brazed joints and the fracture surfaces of the tested samples are investigated by SEM.