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Volume 9, Issue 1, January 2020, Page: 1-6
Back Pressure Equal Channel Angular Pressing of Consolidate Pure Al Particles
Li Yinglong, School of Materials Science and Engineering, Northeastern University, Shenyang, P. R. China; State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, P. R. China; Laboratory of Lightweight Structural Materials, Shenyang, P. R. China
He Lizi, Key Lab of Electromagnetic Processing of Materials, Northeastern University, Shenyang, P. R. China
Zhang Ling, School of Materials Science and Engineering, Northeastern University, Shenyang, P. R. China; State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, P. R. China; Laboratory of Lightweight Structural Materials, Shenyang, P. R. China; School of Mechanical and Engineering, Ningxia Institute of Technology, Shizuishan, P. R. China
Received: Dec. 11, 2019;       Published: Feb. 3, 2020
DOI: 10.11648/j.ijmsa.20200901.11      View  432      Downloads  239
Abstract
In this study, pure aluminum particles were successfully consolidated to fully dense bulk material by back pressure equal channel angular pressing (BE-ECAP) at room temperature, the evolutions of microstructure and densification mechanism were systematically investigated using an FEI-TECNAI G20 transmission electron microscope (TEM) operating at 200kV, FEI field-emission scanning electron microscope (FE-SEM) and hardness testing. The results indicated that the strong bulk materials from particles were successfully produced. After 4 BE-ECAP passes, the present samples show finer grains with the average grain size of ~10μm, the density of the sample was considerably higher compared to those of the materials that had undergone ECAP without back pressure, and was approach to the theoretical density of pure Al. This was related to the combination of hydrostatic pressure, shear deformation and strain accumulation. The mechanisms of grain refinement was the dislocation generated inside grains moves towards the grain boundary continuously, and accumulates, tangles annihilates at the grain boundaries, which resulting in the grains continuously fragmented and refined.
Keywords
Powder Consolidation, Back Pressure (BE), Equal Channel Angular Pressing (ECAP), Aluminum Particle
To cite this article
Li Yinglong, He Lizi, Zhang Ling, Back Pressure Equal Channel Angular Pressing of Consolidate Pure Al Particles, International Journal of Materials Science and Applications. Vol. 9, No. 1, 2020, pp. 1-6. doi: 10.11648/j.ijmsa.20200901.11
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
K Matsuki, T Aida, T Takeuchi, J Kusui, K. Yokoe. Microstructural characteristics and superplastic like behavior in aluminum powder alloy consolidated by equal channel angular pressing. Acta Materialia, 2000 (48): 2625-2632.
[2]
O N Senkov, S V Senkova, J M Scott, D B Miracle. Compaction of amorphous aluminum alloy powder by direct extrusion and equal channel angular extrusion. Materials Science and Engineering A, 2005 (393): 12-21.
[3]
M H Paydar, M Reihanian, E Bagherpour, M Sharifzadeh, M Zarinejad, T A Dean. Consolidation of Al particles through forward extrusion-equal channel angular pressing (FE-ECAP). Materials Letters, 2008 (62): 3266-3268.
[4]
Kondaiah Gudimetla, Ramesh Kumar S, Ravisankar B, Prasad Prathipati R and Kumaran S. Consolidation of commercial pure aluminum particles by hot ECAP. Materials Science and Engineering, 2018 (330): 1-6.
[5]
Gudimetla K, Kumar S R, Ravisankar B and Kumaran S. Densification of Al 5083 mechanically alloyed powder by equal channel angular pressing, Transction of the Indian Institute of Metals, 2015 (68): s171-s176.
[6]
Gudimetla K, Jampana G V, Kumar S R, Ravisankar B and Kumaran S. Effect of Equal Channel Angular Pressing on Densification Behavior of Al 5083 Alloy Powder. Materials Science Forum, 2015 (830): 63-66.
[7]
Xiao-xi WANG, Min HE, Zhen ZHU, Ke-min XUE, Ping LI. Influence of twist extrusion process on consolidation of pure aluminum powder in tubes by equal channel angular pressing and torsion. Transactions of Nonferrous Metals Society of China, 2015 (25): 2122-2129.
[8]
M Jahedi, M H Paydar. Study on the feasibility of the torsion extrusion (TE) process as a severe plastic deformation method for consolidation of Al powder. Materials Science and Engineering A, 2010 (527): 5273-5279.
[9]
Wang X X, Xue K M, Li P, et al. Equal channel angular pressing and torsion of pure Al powder in tubes [C] //Advanced Materials Research. Trans Tech Publications, 2010, 97: 1109-1115.
[10]
Wang X, Min H E, Zhen Z H U, et al. Influence of twist extrusion process on consolidation of pure aluminum powder in tubes by equal channel angular pressing and torsion [J]. Transactions of Nonferrous Metals Society of China, 2015, 25 (7): 2122-2129.
[11]
Mani B, Jahedi M and Paydar M H. Consolidation of commercial pure aluminum powder by torsional equal channel angular pressing (T-ECAP) at room temperature, Powder Technology, 2012 (219): 1-8.
[12]
Li Ping, Xue Ke-min, Wang Xiao-xi. Refinement and consolidation of pure Al particles by equal channel angular pressing and torsion. Transactions of Nonferrous Metals Society of China, 2014, 24 (5): 1289-1294.
[13]
K. Xia, X Wu. Back pressure equal channel angular consolidation of pure Al particles. Scripta Materialia, 2005 (53): 1225-1229
[14]
S Goussous, W Xu, X Wu, K Xia. Al-C nanocomposites consolidated by back pressure equal channel angular pressing. Composites Science and Technology, 2009 (69): 1997-2001.
[15]
X Wu, W Xu, K Xia. Pure aluminum with different grain size distributions by consolidation of particles using equal channel angular pressing with back pressure. Materials Science and Engineering A, 2008 (493) 241-245.
[16]
Riccardo Casati, Maurizio Vedani, David Dellasega, Paola Bassani and Ausonio Tuissi. Consolidated Al/Al2O3 nanocomposites by equal channel angular pressing and hot extrusion. Materials and Manufacturing Processes, 2015 (30): 1218-1222.
[17]
Derakhshandeh Haghigh Reza, Jahromi Seyed and Ahmad Jenabali. The Effect of Multi-pass Equal-Channel Angular Pressing (ECAP) for Consolidation of Aluminum-Nano Alumina Composite Powder on Wear Resistance, Journal of Materials Engineering and Performance 2016, 25 (2): 687-696.
[18]
Xia K, Wu X, Honma T, et al. Ultrafine pure aluminium through back pressure equal channel angular consolidation (BP-ECAC) of particles [J]. Journal of materials science, 2007, 42 (5): 1551-1560.
[19]
Wu X, Xia K. Back pressure equal channel angular consolidation—Application in producing aluminium matrix composites with fine flyash particles [J]. Journal of materials processing technology, 2007, 192: 355-359.
[20]
Venkatraman R, Raghuraman S, Balaji R, et al. Investigation of tensile property and pore closure behavior and the influence of processing route during equal channel angular pressing of pure aluminum powder compacts [C]//Applied Mechanics and Materials. Trans Tech Publications Ltd, 2014, 592: 444-450.
[21]
Gudimetla K, Chaithanyakrushna B, Chandra Sekhar K, et al. Densification and Consolidation of Al 5083 Alloy Powder by Equal Channel Angular Pressing [C]//Applied Mechanics and Materials. Trans Tech Publications Ltd, 2014, 592: 112-116.
[22]
Xu W, Wu X, Honma T, et al. Nanostructured Al–Al2O3 composite formed in situ during consolidation of ultrafine Al particles by back pressure equal channel angular pressing [J]. Acta Materialia, 2009, 57 (14): 4321-4330.
[23]
Wu X L, Xu W, Kubota M, et al. Bulk Mg produced by back pressure equal channel angular consolidation (BP-ECAC) [C] //Materials Science Forum. Trans Tech Publications, 2008, 584: 114-118.
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