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Gradierungspressen – Hochverformung mit definiertem Gradienten
Author(s) -
Neugebauer R.,
Sterzing A.,
Selbmann R.,
Zachäus R.,
Bergmann M.
Publication year - 2012
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201200004
Subject(s) - gradation , deformation (meteorology) , extrusion , materials science , ductility (earth science) , composite material , refining (metallurgy) , work (physics) , mechanical engineering , metallurgy , computer science , engineering , creep , computer vision
In Severe Plastic Deformation (SPD) processes usually the whole material volume is subjected to the severe deformation. The generated fine‐grained structure is proposed to be uniformly distributed throughout the component. The resulting physical and mechanical properties have a comparatively even distribution at a homogeneous level. The goal of the presented research work is to generate a defined inhomogeneous structure with advantageous property distributions corresponding to local loads on the component. The new forming technology gradation extrusion has been developed for this purpose. This method is the base for the manufacture of cylindrical parts with a defined gradation of the grain size allowing new local combinations of physical and mechanical properties. The new technology has the potential to produce an ultrafine‐grained structure which can extend up to several mm deep below the surface. This layer is characterized by an increased strength while the inner material with a coarse grained structure has excellent ductility. Such a property combination has a high relevance for many practical applications. The presented technological approach can bridge the gap between methods refining the complete volume and methods of surface refinement only.