Continuous extrusion of commercially pure titanium GRADE 4

• Autorzy: Palan J. , Taboada J. V. , Kubina T. , Malecek L. , Hodek J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Continuous extrusion of metals using Conform™ machine is used to introduce severe plastic deformation and to improve mechanical properties of metals by reducing their grain size. This paper describes a development of a continuous extrusion sequence for Ti grade 4 in the CONFORM 315i machine. Design/methodology/approach: The influence of material flow conditions on the surface quality of final extruded rods was analyzed with the FEM-based DEFORMTM software. Findings: During the development, several process parameters were varied, such as the die chamber temperature and the extrusion velocity. Research limitations/implications: The goal was to conduct the experiment at the lowest possible temperature in order to achieve a maximum strain hardening effect. The material’s mechanical properties and its flow through the die chamber were studied. The homogeneity of the material flow and the surface quality of final rods were then optimized. Originality/value: The effort led to improvements in the analytical model used in the FEM simulation so that the surface quality can now be optimized more efficiently.

Słowa kluczowe

EN

FEM simulation; continuous extrusion; titanium; SPD; Conform™; DEFORMTM; grain size

PL

symulacja FEM; wyciskanie ciągłe; tytan; SPD; Conform; wielkość ziarna

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2015
• Tom: Vol. 69, nr 1
• Strony: 33--37
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Palan J.

• COMTES FHT a.s., Průmyslová 995, Dobřany 334 41, Czech Republic

autor

Taboada J. V.

• COMTES FHT a.s., Průmyslová 995, Dobřany 334 41, Czech Republic

autor

Kubina T.

• COMTES FHT a.s., Průmyslová 995, Dobřany 334 41, Czech Republic

autor

Malecek L.

• COMTES FHT a.s., Průmyslová 995, Dobřany 334 41, Czech Republic

autor

Hodek J.

• COMTES FHT a.s., Průmyslová 995, Dobřany 334 41, Czech Republic

Bibliografia

• [1] J.R. Weertman, D. Farkas, K. Hemker, H. Kung, M. Mayo, R. Mitra, H. Van Swygenhovenet, Structure and mechanical behavior of bulk nanocrystalline materials, MRS Bulletin 24/2 (1999) 44-53.
• [2] K.S. Kumar, H. Van Swygenhoven, S. Suresh, Mechanical behavior of nanocrystalline metals and alloys, Acta Materialia 51/19 (2003) 5743-5774.
• [3] A. Mishra, B. Kad, F. Gregoric, M.A. Meyersa, Microstructural evolution in copper subjected to severe plastic deformation: Experiments and Analysis, Acta Materialia 55/1 (2007) 13-28.
• [4] J. Zrnik, S.V. Dobatkin, T. Kovarik, J. Dzugan, Ultrafine grain structure development in steels with different carbon content subjected to severe plastic
• [5] J. Zrník, S. V. Dobatkin, M. Fujda, J. Džugan, Effect of preliminary treatment on grain refinement of medium carbon steel using ECAP at increased temperature, Materials Science Forum 638-642 (2010) 2013-2018.
• [6] T. Kubina, J. Dlouhý et al., Preparation and thermal stability of ultra-fine and nano-grained commercially pure titanium wires using conform equipment, Materials and Technology 49/2 (2015) 213-217.
• [7] J.R. Dawson, ConformTM technology for cost effective manufacture of copper strip, Technical report, BWE Ltd., UK.
• [8] C. Etherington, The UKEA conform method of continuous extrusion forming, Wire Industries 44/2 (1977) 85-89.
• [9] D.S. Peng, BQ. Yao, T. Y. Zuo, The experimental simulation of deformation behavior of metals in the conform process, Journal of Materials Processing Technology 31/1-2 (1992) 85-92.
• [10] T. Reinikainen, A. Korhonen et al., Computer-aided modelling of a new copper extrusion process, CIRP Annals - Manufacturing Technology 42/1 (1993) 265-268.
• [11] X. Velay, T. Sheppard, Plane Strain and Threedimensional coupled thermomechanical simulation of the conform process, Proceedings of International Aluminium Extrusion Technology Seminar, Aluminum Extruders Council, Aluminum Association, Chicago, 2000, 505-517.
• [12] J.R. Cho, H.S. Jeong, Parametric investigation on the curling phenomenon in CONFORM process by 3D finite element analysis, Journal of Materials Processing Technology 110/1 (2001) 53-60.
• [13] J. Hodek, T. Kubina et al., FEM Model of Continuous Extrusion of Titanium in Deform Software, COMAT 2012, Pilsen, 2012.