The structure and properties of chosen metals after ECAP

• Autorzy: Greger M. , Kocich R. , Čížek L. , Dobrzański L. A. , Widomská M. , Kuřetová B. , Silbernagel A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This paper was aimed at verification of functionality of the ECAP technology at extrusion of the copper, alluminium alloys and steel. Design/methodology/approach: Experiments were made on equipment, which is demonstrated in the Fig 1. Deformation forces were measured during extrusion, resistance to deformation was calculated and deformation speed was determined approximately. Analysis of structure was made with use of light microscopy and TEM. Findings: The samples of Cu and Al alloys were extruded at room temperature. For the samples of steel was used the two-stage pressing, when the samples were extruded at temperature of approx. T1 = 325°C and T2 = 220°C. In order to increase concentration of deformation in volume of the sample the samples were after individual passes turned around their longitudinal axis by 90 o and they were extruded again. Research limitations/implications: research were limited to the die with constant extrusions angless within the value of 90°. In the future, it is planne to analyse the influence of changes of the angle and relative reduction ration on the ECAP process. Originality/value: Cross-section of original samples of Cu and Al alloys was 8 x 8 mm and their length was 32 mm and cross-section of original samples of Fe alloy was 10 x 10 mm and their length was 40 mm.

Słowa kluczowe

EN

nanomaterials; ECAP; microstructure; mechanical properties

PL

nanomateriały; ECAP; przeciskanie przez kanał kątowy; mikrostruktura; właściwości mechaniczne

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 103--106
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Greger M.

• Faculty of Metallurgy and Materials Engineering, VSB-Technical University Ostrava, 17.listopadu 15, 708 33, Czech Republic

autor

Kocich R.

• Faculty of Metallurgy and Materials Engineering, VSB-Technical University Ostrava, 17.listopadu 15, 708 33, Czech Republic

autor

Čížek L.

• Faculty of Metallurgy and Materials Engineering, VSB-Technical University Ostrava, 17.listopadu 15, 708 33, Czech Republic

autor

Dobrzański L. A.

• Division of Materials Processing Technology and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Widomská M.

• Division of Materials Processing Technology and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Kuřetová B.

• Faculty of Metallurgy and Materials Engineering, VSB-Technical University Ostrava, 17.listopadu 15, 708 33, Czech Republic

autor

Silbernagel A.

• Faculty of Engineering, VSB-Technical University Ostrava, 17.listopadu 15, 708 33 Ostrava Poruba, Czech Republic

Bibliografia

• [1] I. Karaman, et al. The effect of severe marforming on shape memory characteristics of a Ti rich NiTi alloy processed using ECAP. Metal. Mat. Trans. Vol. 34A, pp. 2527-2539.
• [2] A.M. Camacho, M. Marin, L. Sevilla, R. Domingo, Influence of strain hardening on forces and contact pressure distributions in forging processes. In CAM3S, 2005, p. 23.
• [3] M. Greger, S. Rusz Possibilities of aluminium extrusion with use of the ECAP method. In IX international conference Aluminium in transport 2003, Fotobit, Krakow 2003, p.165.
• [4] I.J. Beyerlein, R.A. Lebensohn, C.N. Tomé: Ultrafine Grained Materials II. TMS, Seattle, 2002, p. 585.
• [5] P. Kwapulinski et al. Magnetic properties of amorphous and nanocrystalline alloys based on iron. J. Mat.Proc.Tech. 157-158 (2004), p. 735-742.
• [6] M. Greger, R. Kocich, S. Rusz: In 6. Vedecko-technická konferencia „ Materiál v inžinierskej praxi 2005“. Herľany, s. 85.
• [7] J. Adamczyk, M. Opiela: Niejednorodnosc odksztalcenija plastycznego austenitu stali konstrukcyjnej mikrostopowej. In AMME 2000, p. 5-10.
• [8] Kim, Hyoung Seop; Quang, Pham; Seo, Min Hong; Hong, Sun Ig; Baik, Kyeong Ho; lee, Hong Rho; Nghiep, Do Minh, Process modelling of equal channel angular pressing for ultrafine grained materials
• [9] Raab, J. Georgy, Valiev, Z. Ruslan; Lowe C. Terry; Zhu, T. Yuntian. Continuous processing of ultrafine grained Al by ECAP-Coform
• [10] Wang, Lizhong; Wang, Jingtao; Guo,Cheng; Chen, Jinde Microstructure and properties of ultrafine-grained aluminum-based alloy processed by equal channel angular pressing
• [11] Hyoung Seop Kim; Min Hong Seo; Sun Ig Hong conference: 5th Asia Pacific Conference on Materials Processing, South Korea Plastic deformation analysis of metals during equal channel pressing
• [12] H. Watanabe; T. Mukai; K. Higashi Osaka Municipal tech. Res. Inst., Japan Conference: Ultrafine Grained Materials II. Proceedings. TMS Annual Meeting, Page: 469-78, Grain refinement and superplasticity in magnesium alloys
• [13] T. Ungar, I. Alexandrov; M. Zehetbauer Inst. For Gen. Phys., Eotvos Univ., Budapest, Hungary JOM, vol.52, no.4, Page: 34-6,Ultrafine-grained microstructures evolving during severe plastic deformation
• [14] J. Georgy. Raab, Z. Ruslan. Valiev, Terry C. Lowe, Yuntian T. Zhu,Materials Science and Engineering A 382 (2004) 30-34 Continuous processing of ultrafine grained Al by ECAP-Conform
• [15] Braszczyńska-Malik K.N. (Częstochowa, Poland), Froven L. (Leuven-heverlee, Belgium) World wide congress on materials and manufacturing engineering and technology Gliwice-Wisla 2005 Equal channel angular pressing of magnesium AZ91 alloy.