Investigation of Microstructure, Hardness and Intermetallic Compound in Friction stir Welding of AA6065 Aluminum Alloy to Copper

Subject Areas :

مجید الیاسی ¹ , Rahim Narimani ² , Mortza Hosseinzadeh ³ , Hamed Aghajani Derazkola ⁴

1 - دانشگاه صنعتی بابل، دانشکده مهندسی مکانیک، گروه ساخت و تولید
2 - Azad University
3 - Amol University
4 - Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University, Tehran, Iran.

Received: 2017-02-07 Accepted : 2018-06-18 Published : 2018-06-22

Keywords: Copper, Friction Stir Welding, Microstructure of joint area, Hardness of joint area, AA6065 aluminum alloy,

Abstract :

In this study, metallurgical properties lap joint of pure copper and 6065 aluminum alloy with friction stir welding technique were investigated. To purpose the metallurgical properties of joint optical microscopy, X-ray diffraction analysis (XRD), energy dispersive X-ray (EDS) and Vickers hardness junction of micro gauge were used. The results shows that due to the direct contact between aluminum alloy and tool shoulder, the microstructure change of AA6065 was more than copper. With increasing tool rotation speed the microstructure size of AA6065 and copper became smaller and with increasing linear speed and cooling rate, the microstructure size of base material became more. The results shows that the structured layers were formed in stir zone which with increasing heat generation they geometry became thinner and stretcher. The combination of base materials in high tool rotation and low travelling speed caused the CuAl2 and Cu9Al4 intermetallic compounds were formed in base metal interface. For changes in microstructure size and formation of intermetallic compounds, the hardness of stir zone was more than other area of joint. The maximum hardness of joint area was 111 Vickers which allocated to the joint that welded with 1130 rpm and 24mm/min tool speed.

References:

 [1]    M. Elyasi, H. Aghajani Derazkola & M. Hosseinzadeh, “Investigations of tool tilt angle on properties friction stir welding of A441 AISI to AA1100 aluminiumˮ, Proc IMechE Part B: J Engineering Manufacture, Vol. 230, No. 7, pp. 1234–1241, 2016.

 

[2]      م. شعبانی، ب. شایق بروجنی و ر.ابراهیمی کهریزسنگی، "تأثیر سرعت چرخش ابزار بر خواص مکانیکی و رفتار خوردگی اتصال غیرهمجنس آلیاژ آلومینیوم 5083 و تیتانیوم خالص تجاری به روش جوشکاری همزن اصطکاکی"، فصلنامه فرآیند های نوین در مهندسی مواد، سال یازدهم، شماره چهارم، صفحات 96-79، زمستان 1396.

 

[3]      ح. آقاجانی درازکلا، م. الیاسی و م. حسین زاده، "بررسی شکل­گیری عیوب و لایه­های بین فلزی در جوشکاری اصطکاکی اغتشاشی آلومینیوم AA100 به فولاد A441 AISI"، فصلنامه فرآیند های نوین در مهندسی مواد، سال نهم، شماره سوم، صفحات 233-119، پاییز 1394.

 

[4]    C. M. Chen & R. Kovacevic, “Joining of Al 6061 alloy to AISI 1018 steel by combined effects of fusion and solid state weldingˮ, International Journal of Machine Tools & Manufacture, Vol. 44, pp. 1205–1214, 2004.

 

[5]    S. Sundaresan & K. G. K. Murti, “The formation of intermetallic phases in aluminum–austenitic stainless steel friction weldsˮ, Material Forum, Vol. 17, pp. 301–307, 1993.

 

[6]    M. Hansen, Constitution of Binary Alloys, New York, McGraw- Hill Book Company Inc, pp. 365-382, 1958.

 

[7]      م. باباجانی، م. شمعانیان و م. کثیری، "ارزیابی ریزساختار و خواص مکانیکی اتصال غیرمشابه اینکلوی 825 به فولاد زنگ نزن آستنیتی L316"، فصلنامه فرآیند های نوین در مهندسی مواد، سال یازدهم، شماره سوم، صفحات 100-87، پاییز 1396.

 

[8]    H. Aghajani Derazkola, H. J. Aval & M. Elyasi, “Analysis of process parameters effects on dissimilar friction stir welding of AA1100 and A441 AISI steelˮ, Science and Technology of Welding and Joining, Vol. 20, No. 7, pp. 553-562, 2015.

 

[9]    H. Aghajani Derazkola & A. Simchi, “Effects of alumina nanoparticles on the microstructure, strength and wear resistance of poly (methyl methacrylate)-based nanocomposites prepared by friction stir processingˮ, Journal of Mechanical Behavior of Biomedical Material, Vol. 79, pp. 246–253.

 

[10] H. Aghajani Derazkola & A. Simchi, “Friction-stir lap-joining of aluminium-magnesium/poly-methyl-methacrylate hybrid structures: thermo-mechanical modelling and experimental feasibility studyˮ, Science and Technology of Welding and Joining, Vol. 23, No. 1, pp. 35-49, 2018.

 

[11] H. Aghajani Derazkola & A. Simchi, “Experimental and thermomechanical analysis of friction stir welding of poly (methyl methacrylate) sheetsˮ, Science and Technology of Welding and Joining, Vol. 23, No. 3, pp. 209-218, 2018.

 

[12] N. Kumar, W. Yuan & R. S. Mishra, “Friction Stir Welding of Dissimilar Alloys and Materialsˮ, Elsevier. Inc, pp 86-92, 2015.

 

[13] M. Farahati, M. Abbasi & S. H. Razavi, “Friction stir welding of AA1050 aluminum alloy to pure copperˮ, Proceedings of The Tenth National Manufacturing Conference, Babol: Noushiravani University of Technology Press, pp. 23-40, 2008.

 

[14] H. Barekatain, “Microstructure and Mechanical Properties in Dissimilar Butt Friction Stir Welding of Severely Plastic Deformed Aluminum AA 1050 and Commercially Pure Copper Sheetsˮ, PhD Thesis, Department of Material Science, Sharif University of Technology, 2013.

 

[15] L. Xia wei, Z. Da tong, Q. Cheng & Z. Wen, “Microstructure and mechanical properties of dissimilar pure copper/1350 aluminum alloy butt joints by friction stir weldingˮ, Transactions of Nonferrous Metals Society of China, Vol 22, pp. 1298-1306, 2012.

 

[16] E. T. Akinlabi & S. A. Akinlabi, “Effect of Heat Input on the Properties of Dissimilar Friction Stir Welds of Aluminium and Copperˮ, American Journal of Materials Science, Vol. 2, No. 5, pp. 147-152, 2012.

 

[17] P. Liu, Q. Shi, W. Wang, X. Wang & Z. Zhang, “Microstructure and XRD analysis of FSW joints for copper T2/aluminium 5A06 dissimilar materialsˮ, Materials Letters, Vol. 62, No. 25, pp. 4106–4108, 2008.

 

[18] Galvão, D. Verdera, D. Gesto, A. Loureiro & D. M. Rodrigues, “Analysing The Challenge of Aluminium to Copper FSWˮ, Proceedings ninth International Symposium on Friction Stir Welding, Alabama, Huntsville University Press, pp. 113-126, 2012.

 

[19] P. Xue, B. L. Xiao, D. Wang & Z. Y. Ma, “Achieving high property friction stir welded aluminium/copper lap joint at low heat inputˮ, Science and Technology of Welding and Joining, Vol. 16, No. 8, pp. 657-661, 2011.

 

[20] J. A. Al Jarrah, “Surface Morphology and Mechanical Properties of Aluminum-Copper Joints Welded by Friction Stir Weldingˮ, Contemporary Engineering Sciences, Vol. 7, No. 5, pp. 219-230, 2014.

 

[21] T. Saeida, A. Abdollah zadehb & B. Sazgarib, “Weldability and mechanical properties of dissimilar aluminum–copper lap joints made by friction stir weldingˮ, Journal of Alloys and Compounds, Vol. 490, No 1–2, pp. 652–655, 2010.

 

[22] C. W. Tan, Z. G. Jiang, L. Q. Li, Y. B. Chen & X. Y. Chen, “Microstructural evolution and mechanical properties of dissimilar Al/Cu joints produced by friction stir weldingˮ, Materials and Design, Vol. 51, pp. 466-473, 2013.

 

[23] P. Xue, B. L. Xiao, D. R. Ni & Z. Y. Ma, “Enhanced mechanical properties of friction stir welded dissimilar Al-Cu joint by intermetallic compoundsˮ, Materials Science and Engineering: A, Vol. 527, No. 21-22, pp. 5723-5727, 2010.

 

[24] P. Xue, B. L. Xiao, D. R. Ni & Z. Y. Ma, “Effect of friction stir welding parameters on the microstructure and mechanical properties of the dissimilar Al-Cu jointsˮ, Materials Science and Engineering: A, Vol. 528, No. 13-14, pp. 4683-4689, 2011.

 

[25] J. R. Davis, “Aluminum and aluminum alloysˮ, 10st ed., AWS welding Handbook, Ohio Metal Park, Vol. 3, Chap. 1, 1998.

 

[26] J. R. Davis, “Copper and copper alloysˮ, 10st ed., AWS welding Handbook, Ohio Metal Park, Vol. 3, Chap. 3, 1998.

 

[27] O. Al Roubaiy, S. M. Nabat & A. D. L. Batako, “Experimental and theoretical analysis of friction stir welding of Al–Cu jointsˮ, International Journal of Advanced Manufacturing Technology, Vol 71, pp. 1631–1642, 2014.

 

[28] H. A. Derazkola, M. Elyasi & M. Hosseinzadeh “Formation of Defects and Intermetallic Compound in Friction Stir welding of AA1100 Aluminum alloy to A441 AISI steelˮ, Advance Processes in Material Engineering, Vol. 9, No. 3, pp. 219-233, 2015.

[29] T. K. Bhattacharya, H. Das & T. K. Pal, “Influence of welding parameters on material flow, mechanical property and intermetallic characterization of friction stir welded AA6063 to HCP copper dissimilar butt joint without offsetˮ, Transection of Nonferrous Metal Socity of China, Vol. 25, pp. 2833−2846, 2015.

 

[30] Elrefaey, M. Takahashi & K. Ikeuchi, “Preliminary Investigation of Friction Stir Welding Aluminium/Copper Lap Jointsˮ, Welding in the World, Vol. 49, pp. 93-101, 2005.

 

[31] P. K. Sahua, S. Pala, S. K. Palb & R. Jainb, “Influence of plate position, tool offset and tool rotational speed on mechanical properties and microstructures of dissimilar Al/Cu friction stir welding jointsˮ, Journal of Materials Processing Technology, Vol. 235, pp. 55–67, 2016.