Recycling of Magnesium Machining Chips via Shear Consolidation Processing

محورهای موضوعی : advanced manufacturing technology

Reza Abdi Behnagh ¹ (Department of Mechanical Engineering, Urmia University of Technology, Iran)
Peyman Mashhadi Keshtiban ² (Department of Mechanical Engineering, Urmia University of Technology, Iran)
Hadi Abdollahi ³ (Department of Mechanical Engineering, Urmia University of Technology, Iran)

تاریخ دریافت : 1396/11/22 تاریخ پذیرش : 1397/07/05 تاریخ انتشار : 1397/12/10

کلید واژه: Microstructure, Chips, Magnesium, Shear Consolidation Processing, Recycling,

چکیده مقاله :

In this research, the feasibility of solid-state recycling of pure magnesium (Mg) chips is investigated by applying a synthesis technique called shear consolidation processing (SCP). During the SCP, machining chips are first loaded into the container and slightly compacted, and then a rotating tool with a designated diameter is plunged into the Mg chips at a selected spindle rotation speed and feed rate. Due to the huge amount of heat generation, the softened materials are compressed and synthesized to form a consolidated part eventually. The results show that the SCP process is a feasible solution for producing a void-free consolidated material directly from Mg chips in a single step. The microstructure analysis using optical microscopy (OM) and scanning electron microscopy (SEM) shows a significant grain refinement in the produced part compared with the base material (from around 900 µm to 11 µm). The recycled specimen has a much higher hardness (at least 100% increase) than the parent material and also exhibits better wear resistance. This improvement is attributed to the resulting fine-grained microstructure due to severe plastic deformation during the SCP process.

منابع و مأخذ:

[1]    Chino, Y., Furuta, T., Hakamada, M., and Mabuchi, M., Fatigue Behavior of AZ31 Magnesium Alloy Produced by Solid-State Recycling, Materials Science, Vol. 41, No. 11, 2006, pp. 3229-3232, DOI:10.1007/s10853-005-5556-x.

[2]    Lazzaro, G., Atzori, C., Recycling of Aluminum Trimmings by Conform Process, Light Metals, 1992, pp. 1379-1384.

[3]    Chino, Y., Mabuchi, M., Deformation Characteristics of Recycled AZ91 Mg Alloy Containing Oxide Contaminants, Materials Transactions, Vol. 49, No. 5, 2008, pp. 1093-1100, DOI:10.2320/matertrans.MC200770.

[4]    Ji, Z. S., Wen, L. H., and Li, X. L., Mechanical Properties and Fracture Behavior of Mg–2.4Nd– 0.6Zn–0.6Zr Alloys Fabricated by Solid Recycling Process, Materials Processing Technology, Vol. 209, No. 4, 2009, pp. 2128-2134, DOI: 10.1016/j.jmatprotec.2008.05.007.

[5]    Chino, Y., JaeSeol, L., Nakaura, Y., Ohori, K., and Mabuchi, M., Mechanical Properties of Mg–Al–Ca Alloy Recycled by Solid–State Recycling, Materials Transactions, Vol. 46, No. 12, 2005, pp. 2592-2595, DOI: 10.2320/matertrans.46.2592.

[6]    Ying, T., Zheng, M., Hu, X., and Wu, K., Recycling of AZ91 Mg Alloy through Consolidation of Machined Chips by Extrusion and ECAP, Transactions of Nonferrous Metals Society of China, Vol. 20, 2010, pp. 604-607, DOI:10.1016/S1003-6326(10)60547-X.

[7]    Chino, Y., Kishihara, R., Shimojima, K., Hosokawa, H., Yamada, Y., Wen, C., Iwasaki, H., and Mabuchi, M., Superplasticity and Cavitation of Recycled AZ31 Magnesium Alloy Fabricated by Solid Recycling Process, Materials Transactions, Vol. 43, No. 10, 2002, pp. 2437-2442, DOI:10.2320/matertrans.43.2437.

[8]    Chino, Y., Hoshika, T., and Mabuchi, M., Enhanced Corrosion Properties of Pure Mg and AZ31Mg Alloy Recycled by Solid-state Process, Materials Science and Engineering: A, Vol. 435-436, 2006, pp. 275-281, DOI:10.1016/j.msea.2006.07.019.

[9]    WU, S., JI, Z., RONG, S., and HU, M., Microstructure and Mechanical Properties of AZ31B Magnesium Alloy Prepared by Solid-State Recycling Process from Chips, Transactions of Nonferrous Metals Society of China, Vol. 20, No. 5, 2010, pp. 783-788, DOI:10.1016/S1003-6326(09)60214-4.

[10] Zhang, T., Ji, Z., and Wu, S., Effect of Extrusion Ratio on Mechanical and Corrosion Properties of AZ31B Alloys Prepared by a Solid Recycling Process, Materials & Design, Vol. 32, No. 5, 2011, pp. 2742-2748, DOI: 10.1016/j.matdes.2011.01.012.

[11] Mabuchi, M., Kubota, K., and Higashi, K., New Recycling Process by Extrusion for Machined Chips of AZ91 Magnesium and Mechanical Properties of Extruded Bars, Materials Transactions, Vol. 36, No. 10, 1995, pp. 1249-1254, DOI: 10.2320/matertrans1989.36.1249.

[12] Nakanishi, M., Mabuchi, M., Saito, N., Nakamura, M., and Higashi, K., Tensile Properties of the ZK60 Magnesium Alloy Produced by Hot Extrusion of Machined Chip, Materials Science Letters, Vol. 17, No. 23, 1997, pp. 2003-2005, DOI: 10.1023/A:1006668924650.

[13] Behnagh, R. A., Shen, N., Ansari, M. A., Narvan, M., Besharati Givi, M. K., and Dind, H., Experimental Analysis and Microstructure Modeling of Friction Stir Extrusion of Magnesium Chips, Manufacturing Science and Engineering, Vol. 138, No. 4, 2015, pp. 041008, DOI: 10.1115/1.4031281.

[14] Behnagh, R. A., Mahdavinejad, R., Yavari, A., Abdollahi, M., and Narvan, M., Production of Wire from AA7277 Aluminum Chips via Friction-Stir Extrusion (FSE), Metallurgical and Materials Transactions B, Vol. 45, No. 4, 2014, pp. 1484-1489, DOI: 10.1007/s11663-014-0067-2.

[15] Behnagh, R. A., Givi, M. K. B., and Akbari, M., Mechanical Properties, Corrosion Resistance, and Microstructural Changes during Friction Stir Processing of 5083 Aluminum Rolled Plates, Materials and Manufacturing Processes, Vol. 27, No. 6, 2012, pp. 636-640, DOI: 10.1080/10426914.2011.593243.

[16] Tang, W., Reynolds, A. P., Production of Wire via Friction Extrusion of Aluminum Alloy Machining Chips, Materials Processing Technology, Vol. 210, No. 15, 2010, pp. 2231-2237, DOI: 10.1016/j.jmatprotec.2010.08.010.

[17] Ansari, M. A., Behnagh, R. A., Narvan, M., Naeini, E. S., and Givi, M. K. B., Optimization of Friction Stir Extrusion (FSE) Parameters Through Taguchi Technique, Transactions of the Indian Institute of Metals, Vol. 69, No. 7, 2015, pp. 1351-1357, DOI: 10.1007/s12666-015-0686-6.

[18] Sharifzadeh, M., Ansari, M. A, Narvan, M., Behnagh, R. A., Araee, A., and Givi, M. K. B., Evaluation of Wear and Corrosion Resistance of Pure Mg Wire Produced by Friction Stir Extrusion, Transactions of Nonferrous Metals Society of China, Vol. 25, No. 6, 2016, pp. 1847-1855, DOI:10.1016/S1003-6326(15)63791-8.

[19] Callister, W. D., Rethwisch, D. G., 4^th Edition, Fundamentals of Materials Science and Engineering: An Integrated Approach, John Wiley & Sons Inc., New York, USA, 2012, pp. 189, ISBN: 1118061608.