Mechanism of Fracture in Friction Stir Processed Aluminium Alloy

  • P. K. Mandal
  • Mebin T. Kuruvila
  • Jithin Devasia
Keywords: Aluminium Alloy, FSP, Fracture Properties, Tensile, Fracture Toughness

Abstract

Aluminium alloys are used for important applications in reducing the weight of the component and structure particularly associated with transport, marine, and aerospace fields. Grain refinement by scandium (Sc) addition can eliminate the casting defects and increase the resistance to hot tearing for high strength aluminium alloys. FSP for cast aluminium alloys have been focused and it has great advantages including solid state microstructural evolution, altering mechanical properties by optimizing process parameters. These parameters are tool rotational speeds (720, and 1000 rpm), traverse speeds (80, and 70 mm/min), and axial compressive forceĀ  at 15 kN, etc. The mechanical properties had been evaluated on FSPed aluminium alloy with different microstructural conditions. Fracture properties of aluminium alloys are very important for industrial applications. Tensile and fracture toughness properties were correlated to microstructural and fractographic features of the aluminium alloys need to explore their essential failure mechanisms.

References

[1] Afify, N., Gaber, A-F., & Abbady, G. (2011). Fine scale precipitations in Al-Zn-Mg alloys after various aging temperatures. Materials Sciences and Applications, 2, 427-434.
[2] Han, N.M., Zhang, X.M., Liu, S.D., He, D.G., & Zhang, R. (2011). Effect of solution treatment on the strength and fracture toughness of aluminium alloy 7050. Journal of Alloys and Compounds, 509, 4138-4145.
[3] Loffler, H., Kovacs, I., & Lendvai, J. (1983). Review decomposition processes in Al-Zn-Mg alloys. Journal of Materials Science, 18, 2215-2240.
[4] Engdahl, T., Hansen, V., Warren, P.J., & Stiller, K. (2002). Investigation of fine scale precipitates in Al-Zn-Mg alloys after various heat treatments. Materials Science and Engineering, A 327, 59-44.
[5] Priya, P., Johnson, D.R., & M.J.M. Krane. (2017). Modeling phase transformation kinetics during homogenization of aluminium alloy 7050. Computational Materials Science, 138, 277-287.
[6] Costa, S., Puga, H., Barbosa, J., & Pinto, A.M.P. (2012). The effect of Sc addition on the microstructure and age hardening behaviour of as cast Al-Sc alloys. Materials and Design, 42, 347-352.
[7] Mandal, P.K. (2017). Heat treatment and friction stir processing effects on mechanical properties and microstructural evolution of sc inoculated Al-Zn-Mg alloys. Materials Science and Metallurgy Engineering, 4(1), 16-28.
[8] Nascinmento, F., Santos, T., Vilaca, P., Miranda, R.M., & Quintino, L. (2009). Microstructural modifications and ductility enhancement of surfaces modified by FSP in aluminium alloys. Materials Science and Engineering A, 506, 16-22.
[9] Kurt, A., Uygur, I., & Cete, E. (2011). Surface modification of aluminium by friction stir processing. Journal of Materials Processing Technology, 313-317.
[10] Ku, M-H., Hung, F-Y., Lui, T-S., Chen, L-H., & Chiang. W-T. (2012). Microstructural effcets of Zn/Mg ratio and post heat treatment on tensile properties of friction stirred process (FSP) Al-xZn-yMg alloys. Materials Transactions, 53(5), 995-1001.
[11] Vratnica, M., Cvijovic, Z., & Radovic, N. (2008). The effect of compositional variations on the fracture toughness of 7000 al-alloys. Materials and Technology, 42(5), 191-196.
[12] Mandal, P.K. (2017 June). Investigation of microstructure and mechanical properties of Al-Zn-Mg and Al-Zn-Mg-Sc alloys after double passes friction stir processing. International Journal of Materials Science and Engineering, 5(2), 47-59.
[13] Zhenbo, H., Zhimin, Y., Sen, L., Ying, D., & Baochuan, S. (2010 Aug). Preparation, microstructure and properties of Al-Zn-Mg-Sc alloy tubes. Journal of Rare Earths, 28(4), 641-646.
[14] Gholami, S., Emadoddin, E., Tajally, M., & Borhani, E. (2015). Friction stir processing of 7075 Al alloy and subsequent aging treatment. Transactions of Nonferrous Metals Society of China, 25, 2847-2855.
[15] Lin, F.C. & Ma, Z.Y. (2009). Achieving high strain rate superplasticity in cast 7075Al alloy via friction stir processing. Journal of Materials Science, 44, 2647-2655.
[16] Hamilton, C., Sommers, A., & Dymek, S. (2009). A thermal model of friction stir welding applied to Sc-modified Al-Zn-Mg-Cu alloy extrusions. International Journal of Machine Tools & Manufacture, 49, 230-238.
[17] Yen, A., Chen, L., Liu, H.S., Xiao, F.F., & Li, X.Q. (2015). Study the strength and fracture toughness of al-zn-mg-cu-ti(-sn) alloys. Journal of Mining and Metallurgy Section B: Metallurgy, 51(1), B, 73-79.
[18] Fuller, C.B., Krause, A.R., Dunand, D.C., & Seidman, D.N. (2002). Microstructure and mechanical properties of a 5754 aluminium alloy modified by Sc and Zr additions. Materials Science and Engineering A, 338, 8-16.
[19] Kamp, N., Sinclair, I., & Starink, M.J. (2002 Apr). Toughness-strength relations in the overaged 7449 Al-based alloy. Metallurgical and Materials Transactions A, 33A, 1125-1136.
[20] Seah, K.H.W. & Sharma, S.C. (1996). Fracture toughness of cast Al-Zn-Mg alloys. Journal of Materials Science and Technology, 12, 199-202.
[21] Ludtka, G.M. & Laughlin, D.E. (1982 Mar). The Influence of Microsturcture and Strength on the Fracture Mode and Toughness of 7XXX Series Aluminium Alloys. Metallurgical and Materials Transactions A, 13A, 411-425.
[22] Fukui, T. (1974). Influence of iron and silicon on toughness and fracture characteristics of Al-Mg-Mn and Al-Zn-Mg alloys. Transactions of The Japan Institute of Metals and Materials (JIM), 15, 1-10.
[23] Reddy, A.C. & Rajan, S.S. (2005 Feb). Influence of ageing, inclusions and voids on ductile fracture mechanism in commercial Al-alloys. Bulletin of Material Science, 28(1), 75-79.
Published
2019-12-31
How to Cite
P. K. Mandal, Mebin T. Kuruvila, & Jithin Devasia. (2019). Mechanism of Fracture in Friction Stir Processed Aluminium Alloy. International Journal of Engineering and Management Research, 9(6), 69-76. Retrieved from http://www.ijemr.net/ojs/index.php/ojs/article/view/19