Development of unconventional forming methods

• Autorzy: Rusz S. , Čížek L.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Paper presents results of progress ECAP processing method for UFG structure reached (gained). The properties and microstructure are influenced by technological factors during application ECAP method. Design/methodology/approach: Summary of methods studied on Department of technology at Machining faculty of VŠB-TU Ostrava through of co-operation with Institute of Engineering Materials and Biomaterials, Silesian University of Technology is presented. Findings: Achievement of ultra-fine grained structure in initial material leads to substantial increase of plasticity and makes it possible to form materials in conditions of „superplastic state“. Achievement of the required structure depends namely of the tool geometry, number of passes through the matrix, obtained deformation magnitude and strain rate, process temperature and lubrication conditions. High deformation at comparatively low homologous temperatures is an efficient method of production of ultra-fine grained solid materials. The new technologies, which use severe plastic deformation, comprise namely these techniques: High Pressure Torsion, Equal Channel Angular Pressing = ECAP, Cyclic Channel Die Compression = CCDC, Cyclic Extrusion Compression = CEC, Continuous Extrusion Forming = CONFORM, Accumulative Roll Bonding, Constrained Groove Pressing. Research limitations/implications: Achieved hardness and microstructure characteristics will be determined by new research. Practical implications: The results may be utilized for a relation between structure and properties of the investigated materials in future process of manufacturing. Originality/value: These results contribute to complex evaluation of properties new metals after application unconventional forming methods. The results of this paper are determined for research workers deal by the process severe plastic deformation.

Słowa kluczowe

EN

metallic alloys; ECAP method; mechanical properties; microstructure

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 54, nr 2
• Strony: 194--201
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Rusz S.

• VŠB-Technical University of Ostrava, 17.listopadu 15, 708 33 Ostrava, Czech Republic

autor

Čížek L.

• VŠB-Technical University of Ostrava, 17.listopadu 15, 708 33 Ostrava, Czech Republic

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