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Welding of heterogeneous joints by laser
Charvátová, Eliška ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This diploma thesis deals with welding of two dissimilar materials by laser. The samples were welded by direct beam guidance and wobbling, with and without using high alloy filler material and with the use of a diffusion barrier in the form of nickel. Welding was done with different shielding atmospheres. Nondestructive (VT, PT, UT-PA, RT) and destructive tests were performer (tensile test at room and elevated temperatures, microhrardness). Metalography was suplemented by EDX analysis of selected elements.
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HSS welding process automation in nuclear power plant
Charvátová, Eliška ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
The bachelor thesis compares the manual and mechanized method of welding in the production of dissimilar weld joint. The samples were welded from austenitic and ferritic-perlitic parent materials with using the same type of high alloy filler material. Joint geometry is identical for both methods. Nondestructive and destructive controls were performed, the structural changes in the materials given by the different amounts of heat transfer into the weld joint were compared. Increasing the corrosion resistance of the inner pipe surface is ensured by nickel layer.
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Welding of heterogeneous joints by laser
Charvátová, Eliška ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This diploma thesis deals with welding of two dissimilar materials by laser. The samples were welded by direct beam guidance and wobbling, with and without using high alloy filler material and with the use of a diffusion barrier in the form of nickel. Welding was done with different shielding atmospheres. Nondestructive (VT, PT, UT-PA, RT) and destructive tests were performer (tensile test at room and elevated temperatures, microhrardness). Metalography was suplemented by EDX analysis of selected elements.
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HSS welding process automation in nuclear power plant
Charvátová, Eliška ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
The bachelor thesis compares the manual and mechanized method of welding in the production of dissimilar weld joint. The samples were welded from austenitic and ferritic-perlitic parent materials with using the same type of high alloy filler material. Joint geometry is identical for both methods. Nondestructive and destructive controls were performed, the structural changes in the materials given by the different amounts of heat transfer into the weld joint were compared. Increasing the corrosion resistance of the inner pipe surface is ensured by nickel layer.
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