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Mechanical modelling of the plastic flow machining process

Vu, V. Q.; Beygelzimer, Y.; Kulagin, R. 1; Toth, L. S.
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


A new severe plastic deformation process, plastic flow machining (PFM), was introduced recently to produce sheet materials with ultrafine and gradient structures from bulk samples in one single deformation step. During the PFM process, a part of a rectangular sample is transformed into a thin sheet or fin under high hydrostatic pressure. The obtained fin is heavily deformed and presents a strain gradient across its thickness. The present paper aims to provide better understanding about this new process via analytical modelling accompanied by finite element simulations. PFM experiments were carried out on square commercially pure aluminum (CP Al) billets. Under pressing, the material flowed from the horizontal channel into a narrow 90° oriented lateral channel to form a fin sheet product, and the remaining part of the sample continued to move along the horizontal channel. At the opposite end of the bulk sample, a back-pressure was applied to increase the hydrostatic pressure in the material. The experiments were set at different width sizes of the lateral channel under two conditions; with or without applying back-pressure. A factor called the lateral extrusion ratio was defined as the ratio between the volume of the produced fin and the incoming volume. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000085262
DOI: 10.3390/ma11071218
Zitationen: 15
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 1996-1944
KITopen-ID: 1000085262
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Erschienen in Materials
Verlag MDPI
Band 11
Heft 7
Seiten Art. Nr.: 1218
Schlagwörter lateral extrusion ratio; Finite Element (FE) simulation; analytical modelling; plastic flow machining; back pressure
Nachgewiesen in Dimensions
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