Predicting ECAP misorientation evolution and its influence on superplasticity for an Al-Zn-Mg-Cu alloy

Predicting ECAP misorientation evolution and its influence on superplasticity for an Al-Zn-Mg-Cu alloy

Fernando Carreño

Abstract. Extensive research on severe plastic deformation (SPD) of metallic materials has been performed so far in order to improve mechanical properties, both at low and high temperatures. As a result of the extensive grain refinement obtained, increased superplastic behaviour has been attained at higher strains rates and lower temperatures than usual. This is due to finer grain sizes and higher average misorientations obtained, which enhance grain boundary sliding (GBS). However, the misorientation effect on superplasticity, and the prediction of misorientation evolution during SPD has remained so far, qualitative. In this research, especial attention has been given to the quantitative misorientation evolution with increasing equal channel angular pressing (ECAP) deformation, in order to propose an expression useful to describe and predict the influence of the different processing parameters on the misorientation evolution with strain. This is exemplified for ECAPed Al-Zn-Mg-Cu and other aluminium alloys, and it could serve as a basis for predicting the misorientation evolution, and its influence on superplasticity, of other SPD processes and metallic alloys.

Keywords
Aluminium SPD Grain Refinement, ECAP Misorientation Evolution, New Misorientation Expression, GBS Superplastic Constitutive Equation

Published online , 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Fernando Carreño, Predicting ECAP misorientation evolution and its influence on superplasticity for an Al-Zn-Mg-Cu alloy, Materials Research Proceedings, Vol. 32, pp 189-196, 2023

DOI: https://doi.org/10.21741/9781644902615-21

The article was published as article 21 of the book Superplasticity in Advanced Materials

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] V. M. Segal, Plastic Working of Metals by Simple Shear, Russian Metallurgy, Vol. 1, 1981, pp. 99-105
[2] R. Valiev, R. Islamgaliev, I.V. Alexandrov, Bulk Nanostructured Materials from Severe Plastic Deformation. Prog. Mater. Sci. 45 (2000) 103-189. https://doi.org/10.1016/S0079-6425(99)00007-9
[3] P.J. Apps, J.R. Bowen, P.B. Prangnell, The effect of coarse second-phase particles on the rate of grain refinement during severe deformation processing, Acta Mater. 51 (2003) 2811-2822. https://doi.org/10.1016/S1359-6454(03)00086-7
[4] A. Goloborodko, O. Sitdikov, R. Kaibyshev, H. Miura, T. Sakai, Effect of pressing temperature on fine-grained structure formation in 7475 aluminum alloy during ECAP, Mater. Sci. Eng. A 381 (2004) 121–128. https://doi.org/10.1016/j.msea.2004.04.049
[5] I. Mazurina, T. Sakai, H. Miura, O. Sitdikov, R. Kaibyshev, Grain refinement in aluminum alloy 2219 during ECAP at 250 °C, Mater. Sci. Eng. A 473 (2008) 297-305. https://doi.org/10.1016/j.msea.2007.04.112
[6] M. Kawasaki, Z. Horita, T.G. Langdon, Microstructural Evolution in High Purity Aluminum Processed by ECAP, Mater. Sci. Eng. A 524 (2009) 143-150. https://doi.org/10.1016/j.msea.2009.06.032
[7] C.M. Cepeda-Jiménez, J.M. García-Infanta, O.A. Ruano, F. Carreño, Mechanical properties at room temperature of an Al-Zn-Mg-Cu alloy processed by equal channel angular pressing, J. Alloys Compounds 509 (2011) 8649–8656. https://doi.org/10.1016/j.jallcom.2011.06.070
[8] C.M. Cepeda-Jiménez, J.M. García-Infanta, O.A. Ruano, F. Carreño, High strain rate superplasticity at intermediate temperatures of the Al 7075 alloy severely processed by equal channel angular pressing, J. Alloys Compounds 509 (2011) 9589-9597. https://doi.org/10.1016/j.jallcom.2011.07.076
[9] K. Wang, F.C. Liu, P. Xue, D. Wang, B.L. Xiao, Z.Y. Ma, Superplastic Constitutive Equation Including Percentage of High-Angle Grain Boundaries as a Microstructural Parameter, Metall. Mater. Trans. A 47A (2016) 546-559. https://doi.org/10.1007/s11661-015-3230-8
[10] T. Khelfa, M. A. Rekik, J. A. Muñoz-Bolaños, J. M. Cabrera-Marrero, M. Khitouni, Microstructure and strengthening mechanisms in an Al-Mg-Si alloy processed by equal channel angular pressing (ECAP), The Int. J. Adv. Manuf. Techn. 95 (2018) 1165–1177. https://doi.org/10.1007/s00170-017-1310-1
[11] F. Carreño, O.A. Ruano, Superplasticity of Aerospace 7075 (Al-Zn-Mg-Cu) Aluminium Alloy Obtained by Severe Plastic Deformation, Defect Diff. Forum 385 (2018) 39-44. https://doi.org/10.4028/www.scientific.net/DDF.385.39
[12] A. Orozco-Caballero, O.A. Ruano, E. F. Rauch, F. Carreño, Severe friction stir processing of an Al-Zn-Mg-Cu alloy: Misorientation and its influence on superplasticity, Mater. Design 137 (2018) 128-139. https://doi.org/10.1016/j.matdes.2017.10.008
[13] F. Carreño, A. Orozco-Caballero, Superplastic GBS Constitutive Equation Incorporating Average Grain Misorientation Dependence, Mater. Sci. Forum 941 (2018) 1501-1506. https://doi.org/10.4028/www.scientific.net/MSF.941.1501
[14] R.B. Figueiredo, M. Kawasaki, T.G. Langdon, Seventy years of Hall-Petch, ninety years of superplasticity and a generalized approach to the effect of grain size on flow stress, Prog. Mater. Sci. 137 (2023) 101131. https://doi.org/10.1016/j.pmatsci.2023.101131
[15] K. Edalati, Superfunctional Materials by Ultra-Severe Plastic Deformation, Materials 16 (2023) 587. https://doi.org/10.3390/ma16020587
[16] O.A. Ruano, O.D. Sherby, On constitutive equations for various diffusion-controlled creep mechanisms, Rev. Phys. Appl. 23 (1988) 625–637. https://doi.org/10.1051/rphysap:01988002304062500
[17] J.K. Mackenzie, Second Paper on Statistics Associated with the Random Disorientation of Cubes, Biometrika 45 (1958) 229-240. http://www.jstor.org/stable/2333059