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Effect of surface relief on solid phase joining of heat-resistant nickel superalloys E. V. Galieva, R. Ya. Lutfullin, A. Kh. Akhunova [et al.]

Contributor(s): Lutfullin, R. Ya | Akhunova, A. Kh | Valitov, V. A | Dmitriev, Sergey V | Galieva, E. VMaterial type: ArticleArticleContent type: Текст Media type: электронный Subject(s): суперсплавы на основе Ni | суперсплавы на основе Ni3Al | сварка давлением | твердофазное соединение | сверхпластичность | поверхностный рельефGenre/Form: статьи в журналах Online resources: Click here to access online In: Science and technology of welding and joining Vol. 23, № 7. P. 612-618Abstract: Pressure welding (PW) is an advanced method for obtaining solid phase joints (SPJs). Using physical and finite element modelling (FEM) it is shown that PW under superplasticity conditions provides SPJs between dissimilar cast single-crystal intermetallic and deformed polycrystalline heat-resistant Ni-based superalloys. Special attention is paid to exclude the stagnant zones in the solid phase joining region using surface relief. The results of physical modelling and FEM are in qualitative agreement. It is revealed that the surface relief can decrease the stagnant zone and increase localisation of deformation in the joining region, which helps to improve the joining quality. A monotonous change in microhardness in the joint zone is shown.
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Pressure welding (PW) is an advanced method for obtaining solid phase joints (SPJs). Using physical and finite element modelling (FEM) it is shown that PW under superplasticity conditions provides SPJs between dissimilar cast single-crystal intermetallic and deformed polycrystalline heat-resistant Ni-based superalloys. Special attention is paid to exclude the stagnant zones in the solid phase joining region using surface relief. The results of physical modelling and FEM are in qualitative agreement. It is revealed that the surface relief can decrease the stagnant zone and increase localisation of deformation in the joining region, which helps to improve the joining quality. A monotonous change in microhardness in the joint zone is shown.

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