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Severe plastic deformation by incremental bulk metal forming

 
: Neugebauer, Reimund; Sterzing, A.; Bergmann, M.

:
Postprint urn:nbn:de:0011-n-1385409 (2.8 MByte PDF)
MD5 Fingerprint: a7622c0508a468c7317c6c51b3285ee0
The original publication is available at springerlink.com
Created on: 21.4.2011


Production Engineering. Research and development 4 (2010), No.4, pp.391-397
ISSN: 0944-6524
ISSN: 1863-7353
English
Journal Article, Electronic Publication
Fraunhofer IWU ()
incremental bulk forming; ultrafine grained material; graded grain size

Abstract
Incremental bulk forming technologies are investigated with respect to the creation of ultrafine-grained aluminium material. Based on first investigations of spin extrusion the technology of gradation rolling for rod shaped billets was developed. High strain generation as precondition for grain refinement is caused by the so called knead effect during processing in incremental rolling. Cross sections of processed billets show a demarcated area of different reflexion behaviour and a corresponding increase in hardness. In this area a gradient with decreasing grain size in surface direction is shown by crystallographic mapping. A several millimetre thick layer of refined material has been obtained.

: http://publica.fraunhofer.de/documents/N-138540.html