Volume 20, Issue 4 (April 2020)                   Modares Mechanical Engineering 2020, 20(4): 925-932 | Back to browse issues page

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Siahsarani A, Faraji G, Samadpour F. Structural and Mechanical properties of Magnesium Alloy Processed by Severe Plastic Deformation Method of Hydrostatic Cyclic Expansion Extrusion. Modares Mechanical Engineering 2020; 20 (4) :925-932
URL: http://mme.modares.ac.ir/article-15-31181-en.html
1- Mechanical Engineering Department, Engineering Faculty, University of Tehran, Tehran, Iran
2- Mechanical Engineering Department, Engineering Faculty, University of Tehran, Tehran, Iran , ghfaraji@ut.ac.ir
Abstract:   (2008 Views)
Magnesium and its alloys have received much attention not only in the aerospace and electronics industry, but also in medical applications due to its low density, excellent physical properties, and biocompatibility. However, magnesium and its alloys have low ductility and poor strain hardening ability because of the hexagonal crystal structure with the limited number of slip systems at room temperature. Therefore, it seems necessary to improve their ductility and other mechanical properties via novel technologies. In this research, hydrostatic cyclic expansion extrusion has been used to produce ultrafine-grained magnesium rod. Properties of produced rods have been investigated morphologically and mechanically. The numerical investigation has also been performed to show the effects of hydrostatic pressure on strain distribution. Due to the brittleness of magnesium, the process has been conducted at elevated temperatures. Also, due to the fluid limitation at high temperatures, melted polyethylene has been used as the fluid in the process. The results showed that the yield and ultimate strength increased by 54% and 43% after only one pass of the hydrostatic cyclic expansion extrusion process, respectively. Also, elongation increased by 46%. Furthermore, microhardness has also increased with an average of 57 Hv to 70 Hv. The microstructure result showed that the grains become ultrafine-grained after only one pass of the process. Finite element investigation revealed that high hydrostatic pressure has a good effect on improving the strain distribution and the microstructure. This process seems very appropriate for industrial applications due to its ability to produce long ultrafine-grained rods.

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Article Type: Original Research | Subject: Metal Forming
Received: 2019/03/9 | Accepted: 2019/09/11 | Published: 2020/04/17

1. Latysh V, Krallics G, Alexandrov I, Fodor A. Application of bulk nanostructured materials in medicine. Current Applied Physics. 2006;6(2):262-2662. [Link] [DOI:10.1016/j.cap.2005.07.053]
2. Valiev RZ, Estrin Y, Horita Z, Langdon TG, Zechetbauer MJ, Zhu YT. Producing bulk ultrafine-grained materials by severe plastic deformation. The Journal of the Minerals, Metals and Materials Society (TMS). 2006;58:33-39. [Link] [DOI:10.1007/s11837-006-0213-7]
3. Iwahashi Y, Wang J, Horita Z, Nemoto M, Langdon TG. Principle of equal-channel angular pressing for the processing of ultra-fine grained materials. Scripta Materialia. 1996;35(2):143-146. [Link] [DOI:10.1016/1359-6462(96)00107-8]
4. Valiev RZ, Islamgaliev RK, Alexandrov IV. Bulk nanostructured materials from severe plastic deformation. Progress in Materials Science. 2000;45:103-189. [Link] [DOI:10.1016/S0079-6425(99)00007-9]
5. Zhilyaev AP, Langdon TG. Using high-pressure torsion for metal processing: Fundamentals and applications. Progress in Materials Science. 2008;53(6):893-979. [Link] [DOI:10.1016/j.pmatsci.2008.03.002]
6. Valiev RZ, Zhilyaev AP, Langdon TG. Bulk nanostructured materials: Fundamentals and applications. Hoboken: John Wiley & Sons; 2013. [Link] [DOI:10.1002/9781118742679]
7. Pachla W, Kulczyk M, Sus-Ryszkowska M, Mazur A, Kurzydlowski KJ. Nanocrystalline titanium produced by hydrostatic extrusion. Journal of Materials Processing Technology. 2008;205(1-3):173-182. [Link] [DOI:10.1016/j.jmatprotec.2007.11.103]
8. Richert J. A new method for unlimited deformation of metals and alloys. Aliminum. 1986;62:604-607. [Link]
9. Utsunomiya H, Hatsuda K, Sakai T, Saito Y. Continuous grain refinement of aluminum strip by conshearing. Materials Science and Engineering: A. 2004;372(1-2):199-206. [Link] [DOI:10.1016/j.msea.2003.12.014]
10. Eskandarzade M, Masoumi A, Faraji G, Mohammadpour M, Yan XS. A new designed incremental high pressure torsion process for producing long nanostructured rod samples. Journal of Alloys and Compounds. 2017;695:1539-1546. [Link] [DOI:10.1016/j.jallcom.2016.10.296]
11. Lewandowska M, Garbacz H, Pachla W, Mazur A, Kurzydłowski KJ. Grain refinement in aluminium and the aluminium Al-Cu-Mg-Mn alloy by hydrostatic extrusion. Material Science Poland. 2005;23(1):279-286. [Link]
12. Lewandowska M, Kurzydlowski KJ. Recent development in grain refinement by hydrostatic extrusion. Journal of Materials Science. 2008;43:7299-7306. [Link] [DOI:10.1007/s10853-008-2810-z]
13. Richert M, Liu Q, Hansen N. Microstructural evolution over a large strain range in aluminium deformed by cyclic-extrusion-compression. Materials Science and Engineering: A. 1999;260(1-2):275-283. [Link] [DOI:10.1016/S0921-5093(98)00988-5]
14. Pardis N, Talebanpour B, Ebrahimi R, Zomorodian S. Cyclic expansion-extrusion (CEE): A modified counterpart of cyclic extrusion-compression (CEC). Materials Science and Engineering: A. 2011;528(25-26):7537-7540. [Link] [DOI:10.1016/j.msea.2011.06.059]
15. Faraji G, Samadpour F, Babaei P inventors. Hydrostatic cyclic expansion extrusion process for producing ultrafine-grained rods. United States Patent US20180029097. 2018 Feb 1. [Link]
16. Samadpour F, Faraji G, Babaie P, Bewsher SR, Mohammadpour M. Hydrostatic cyclic expansion extrusion (HCEE) as a novel severe plastic deformation process for producing long nanostructured metals. Materials Science and Engineering: A. 2018;718:412-417. [Link] [DOI:10.1016/j.msea.2018.01.116]
17. Rhee K, Han WY, Park HJ, Kim SS. Fabrication of aluminum/copper clad composite using hot hydrostatic extrusion process and its material characteristics. Materials Science and Engineering: A. 2004;384(1-2):70-76. [Link] [DOI:10.1016/j.msea.2004.05.051]
18. Stanford N, Barnett MR. Solute strengthening of prismatic slip, basal slip and {1 0 1 2} twinning in Mg and Mg-Zn binary alloys. International Journal of Plasticity. 2013;47:165-181. [Link] [DOI:10.1016/j.ijplas.2013.01.012]
19. Ensafi M, Faraji G, Abdolvand H. Cyclic extrusion compression angular pressing (CECAP) as a novel severe plastic deformation method for producing bulk ultrafine grained metals. Materials Letters. 2017;197:12-16. [Link] [DOI:10.1016/j.matlet.2017.03.142]
20. Xu S, Zhao G, Ma X, Ren G. Finite element analysis and optimization of equal channel angular pressing for producing ultra-fine grained materials. Journal of Materials Processing Technology. 2007;184(1-3):209-216. [Link] [DOI:10.1016/j.jmatprotec.2006.11.025]
21. Yamashita A, Horita Z, Langdon TG. Improving the mechanical properties of magnesium and a magnesium alloy through severe plastic deformation. Materials Science and Engineering: A. 2001;300(1-2):142-147. [Link] [DOI:10.1016/S0921-5093(00)01660-9]
22. Chen Q, Zhao Z, Chen G, Wang B. Effect of accumulative plastic deformation on generation of spheroidal structure, thixoformability and mechanical properties of large-size AM60 magnesium alloy. Journal of Alloys and Compounds. 2015;632:190-200. [Link] [DOI:10.1016/j.jallcom.2015.01.185]
23. Amani S, Faraji G, Abrinia K. Microstructure and hardness inhomogeneity of fine-grained AM60 magnesium alloy subjected to cyclic expansion extrusion (CEE). Journal of Manufacturing Processes. 2017;28 Pt 1:197-208. [Link] [DOI:10.1016/j.jmapro.2017.06.007]
24. Minárik P, Král R, Čížek J, Chmelík F. Effect of different c/a ratio on the microstructure and mechanical properties in magnesium alloys processed by ECAP. Acta Materialia. 2016;107:83-95. [Link] [DOI:10.1016/j.actamat.2015.12.050]

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