Cobalt-based superalloy layers deposited on X38CrMoV5 steel base metal by explosion cladding process
Article dans une revue avec comité de lecture
A grade 25 cobalt-based superalloy in the form of a sheet 5 mm in thickness and a steel substrate of type X38CrMoV5 are joined by explosion cladding. The macrostructure and microstructure of the interface and of the co-based superalloy layers are studied. The interface presents the form of wavelets with a period of 1000 µm and an amplitude of 250 µm. The superalloy grains are deformed during the cladding process with several slip systems appearing. Near to the interface, the superalloy grains elongate and tend to follow the geometry of the interface. Observation with a scanning electron microscope (SEM) reveals zones of localised fusion at the interface. The EDS analysis shows that these fusion zones are the result of mixing between the base and cladding plates. Radiocrystallographic analysis by X-ray diffraction reveals the presence of the f.c.c cobalt in the cobalt-based superalloy layer. Thus cobalt retains its crystallographic structure (f.c.c) after cladding process. Hardness is evaluated with reference to microstructure. Near the interface, the hardness of the superalloy is of the order of 600 HV1 kg. In the remainder of the thickness, hardness is of the order of 500 HV1 kg, being greater than that of the unplated superalloy (270 HV1 kg). The track obtained by an indentation test at the interface under a load of 100 kg exhibits no cracking. This tends to prove the good metallurgical bond at the interface.
Files in this item
Showing items related by title, author, creator and subject.
Communication avec acteZIMMER-CHEVRET, Sandra; LAYE, Julien; LANGLOIS, Laurent; BIGOT, Régis (2010)The Friction Stir welding process is now introduced in production plants. More and more applications are developed and the most part of the work is now centered on the mean of production to be used. Institut de Soudure and ...
Experimental investigation of the influence of the FSW plunge processing parameters on the maximum generated force and torque Article dans une revue avec comité de lectureZIMMER-CHEVRET, Sandra; LANGLOIS, Laurent; LAYE, Julien; BIGOT, Régis (Springer Verlag, 2010)The paper presents the results of an experimental investigation, done on the friction stir welding (FSW) plunging stage. Previous research works showed that the axial force and torque generated during this stage were ...
FSW process tolerance according to the position and orientation of the tool: requirement for the means of production design Article dans une revue avec comité de lectureZIMMER-CHEVRET, Sandra; JEMAL, Nejah; LANGLOIS, Laurent; BEN ATTAR, Amarilys; HATSCH, Jonathan; ABBA, Gabriel; BIGOT, Régis (Trans Tech Publications Inc, 2014)Friction Stir Welding (FSW) is an innovative welding process increasingly used by industry for the welding of aluminum alloys. In order to reduce the high investment costs of a dedicated FSW’s machine and in order to offer ...
Communication avec acteZIMMER-CHEVRET, Sandra; LANGLOIS, Laurent; LAYE, Julien; GOUSSAIN, Jean-Claude; MARTIN, Patrick; BIGOT, Régis (2010)This paper presents an experimental methodology to determine a Friction Stir Welding (FSW) means of production based on the experimental study of the tool / material mechanical interactions generated during the welding ...
Communication avec acteLANGLOIS, Laurent; ZIMMER-CHEVRET, Sandra; BEN ATTAR, Amarilys; JEMAL, Nejah; HATSCH, Jonathan; ABBA, Gabriel; BIGOT, Régis (2014)The main purpose of the article is to study the evolution of the welding forces and torque with non-straight welding path. The main studies performed on forces and torque are usually done on plane straight welding path ...