Structure and properties of 7075 aluminum alloy products obtained with the KOBO method

• Autorzy: Andrzejewski D. , Jakubowicz J. , Borowski J.

Identyfikatory

DOI

10.1016/j.acme.2015.10.005

• Języki publikacji: EN

Abstrakty

EN

The 7xxx series aluminum alloys are good materials in terms of their high strength to density ratio. Their plastic processing is, however, troublesome. In order to perform plastic processing of the AA-7075 alloy, the KOBO method was applied allowing severe plastic deformations at small extruding forces. The half products, obtained in this way, are characterized by very good mechanical properties. This paper presents the results of investigations of the 7075 aluminum alloy processed (extruded) in different variants by the KOBO method. Structural tests have been performed using EBSD along with X-ray diffraction analysis and an analysis of the mechanical properties. As a supplement, corrosion tests have been carried out in two chemical solutions.

Słowa kluczowe

EN

AA-7075 aluminum alloy; KOBO method; corrosion investigations; EBSD

PL

stop aluminium; metoda KOBO; badania korozyjne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2016
• Tom: Vol. 16, no. 2
• Strony: 217--223
• Opis fizyczny: Bibliogr. 19 poz., rys., tab., wykr.

Twórcy

autor

Andrzejewski D.

• Metal Forming Institute, ul Jana Pawła II 14, 61-139 Poznań, Poland

autor

Jakubowicz J.

• Poznan University of Technology, Institute of Materials Science and Engineering, ul Jana Pawła II 24, 61-138 Poznań, Poland

autor

Borowski J.

• Metal Forming Institute, ul Jana Pawła II 14, 61-139 Poznań, Poland

Bibliografia

• [1] E. Ura-Bińczyk, A.Z. Bałkowiec, Ł. Mikołajczyk, M. Lewandowska, K.J. Kurzydłowski, The influence of grain size on the corrosion resistance of 7475 aluminium alloy, Ochrona przed Korozją 54 (2011) 44–47 (in Polish).
• [2] W. Bochniak, A. Brzostowicz, Fabrication of fine-grained flat products by continuous KOBO methods, Archives of Metallurgy and Materials 55 (2010) 587–600.
• [3] http://www.openaccesslibrary.com/vol16/6.pdf (accessed 12.07.13).
• [4] J. Borowski, D. Andrzejewski, J. Wendland, H. Wiśniewska- Weinert, Properties of semi-products made of aluminum alloys with nanometric structure, Hutnik – Wiadomości Hutnicze 8 (2011) 589–594 (in Polish).
• [5] S. Kumar Panigrahi, R. Jayaganthan, Effect of ageing on microstructure and mechanical properties of bulk, cryorolled, and room temperature rolled Al 7075 alloy, Journal of Alloys and Compounds 509 (2011) 9609–9616.
• [6] M. Benedetti, V. Fontanari, P. Scardi, C.L.A. Ricardo, M. Bandini, Reverse bending fatigue of shot peened 7075-T651 aluminum alloy: the role of residual stress relaxation, International Journal of Fatigue 31 (2009) 1225–1236.
• [7] P. Das, R. Jayaganthan, T. Chowdhury, I.V. Singh, Fatigue behaviour and crack growth rate of cryorolled Al 7075 alloy, Materials Science and Engineering A 528 (2011) 7124–7132.
• [8] W.R. Osório, C.M. Freire, A. Garcia, The role of macrostructural morphology and grain size on the corrosion resistance of Zn and Al castings, Materials Science and Engineering A 402 (2005) 22–32.
• [9] M.J. Starink, X.G. Qiao, J. Zhang, N. Gao, Predicting grain refinement by cold severe plastic deformation in alloys using volume averaged dislocation generation, Acta Materialia 57 (2009) 5796–5811.
• [10] A. Korbel, R. Szyndler, The new solutions in the domain of metal forming – contribution of the Polish engineering idea, Obróbka Plastyczna Metali 21 (2010) 203–216.
• [11] W. Bochniak, A. Korbel, P. Ostachowski, S. Ziółkiewicz, J. Borowski, Extrusion of metals and alloys by KOBO method, Obróbka Plastyczna Metali 24 (2013) 83–97.
• [12] W. Bochniak, A. Korbel, KOBO type forming: forging of metals under complex conditions of the process, Journal of Materials Processing Technology 134 (2003) 120–134.
• [13] A. Korbel, W. Bochniak, Refinement and control of the metal structure elements by plastic deformation, Scripta Materialia 51 (2004) 755–759.
• [14] A. Korbel, W. Bochniak, P. Ostachowski, L. Błaż, Visco-plastic flow of metal in dynamic conditions of complex strain scheme, Metallurgical and Materials Transactions A 42A (2011) 2881–2897.
• [15] A. Korbel, W. Bochniak, Lüders deformation and superplastic flow of metals extruded by KOBO method, Philosophical Magazine 93 (2013) 1883–1913.
• [16] W. Bochniak, Theoretical and Practical Aspects Plastic Forming Metals, KOBO Method, Wydawnictwo AGH, Krakow, 2009 (in Polish).
• [17] J.-P. Li, J. Shen, X.-D. Yan, B.-P. Mao, L.-M. Yan, Microstructure evolution of 7050 aluminum alloy during hot deformation, Transactions of Nonferrous Metals Society of China 20 (2010) 189–194.
• [18] Patent – P.402817 (PST/PL2014/000009). A method for producing parts from non-ferrous alloys, profitably aluminum alloys (in Polish).
• [19] W. Bochniak, A. Korbel, Anomalies in precipitation hardening process of 7075 aluminum alloy extruded by KOBO method, Journal of Materials Processing Technology 216 (2015) 160–168.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę