Effects of multipass friction stir processing and Mg addition on the microstructure and tensile properties of Al 1050 alloys

Abstract

The effects of multipass friction stir processing (FSP) and Mg powder addition on the different microstructure parts, including the stir zone (SZ), heat-affected zone (HAZ), and thermomechanically affected zone (TMAZ) of Al 1050 alloy were investigated. Microstructural observations revealed that with the increase in the number of FSP passes, the grain size of the SZ decreased in the non-composite and composite samples, whereas that of the TMAZ and HAZ increased in the non-composite sample. Furthermore, the addition of Mg powder resulted in considerable grain refinement, and increasing the number of the FSP passes resulted in a more uniform distribution of Al—Mg intermetallic compounds in the in-situ composite sample. Results of the tensile test showed that the non-composite sample that underwent four passes of FSP exhibited a higher elongation percentage and a ductile fracture in comparison with those of the base metal and the composite sample. However, this sample exhibited a brittle fracture and a higher tensile strength in comparison with the base metal and the non-composite sample. The fabrication of composite samples resulted in a remarkable enhancement in hardness in comparison with the base metal and the non-composite samples that underwent FSP.

Keywords

friction stir processing / Al alloy / magnesium / tensile properties / hardness

References

[1] M.M. Esfahani, H.D. Manesh, M. Esmailzadeh, and E. Roshanaei, Microstructure and wear characteristics of 1050Al/Fe surface composites by friction stir processing, Mater. Res. Express, 5(2018), No. 12, art. No. 126518.

[2] Mishra RS, Mahoney MW, Sato Y, Hovanski Y. Friction Stir Welding and Processing VIII, 2015, Hoboken, USA, John Wiley & Sons, Inc.

[3] Attia AN. Surface metal matrix composites. Mater. Des., 2001, 22(6): 451.

[4] Katipelli LR, Dahotre NB. Mechanism of high temperature oxidation of laser surface engineered TiC/Al alloy ‘composite’ coating on 6061 aluminium alloy. Mater. Sci. Technol., 2001, 17(9): 1061.

[5] Sattari B, Shamanian M, Ashrafi A, Salehi M, Salimijazi F. Effect of number of passes on the corrosion behavior of Fe/Al surface composites produced by plasma spraying and friction stir processing. J. Mater. Process. Technol., 2017, 250, 35.

[6] Peng WH, Hao SZ, Chen J, Li W, Zhao LM, Deng J. Surface composite microstructure and improved mechanical property of YG10X cemented carbide induced by high current pulsed electron beam irradiation. Int. J. Refract. Met. Hard Mater., 2019, 78, 233.

[7] K. Li, X.M. Liu, and Y. Zhao, Research status and prospect of friction stir processing technology, Coatings, 9(2019), No. 2, art. No. 129.

[8] Michael Rajan HB, Ramabalan S, Dinaharan I, Vijay SJ. Synthesis and characterization of in situ formed titanium diboride particulate reinforced AA7075 aluminum alloy cast composites. Mater. Des., 2013, 44, 438.

[9] Varin RA. Intermetallic-reinforced light-metal matrix in situ composites. Metall. Mater. Trans. A, 2002, 33(1): 193.

[10] Peng HX, Wang DZ, Geng L, Yao CK, Mao JF. Evaluation of the microstructure of in situ reaction processed Al₃Ti—Al₂O₃—Al composite. Scripta Mater., 1997, 37(2): 199.

[11] Anvari SR, Karimzadeh F, Enayati MH. A novel route for development of Al—Cr—O surface nano-composite by friction stir processing. J. Alloys Compd., 2013, 562, 48.

[12] Ke LM, Huang CP, Xing L, Huang KH. Al—Ni inter-metallic composites produced in situ by friction stir processing. J. Alloys Compd., 2010, 503(2): 494.

[13] Lee IS, Kao PW, Chang CP, Ho NJ. Formation of Al—Mo intermetallic particle-strengthened aluminum alloys by friction stir processing. Intermetallics, 2013, 35, 9.

[14] Azimi-Roeen G, Kashani-Bozorg SF, Nosko M, Švec P. Reactive mechanism and mechanical properties of in-situ hybrid nano-composites fabricated from an Al—Fe₂O₃ system by friction stir processing. Mater. Charact., 2017, 127, 279.

[15] Nelaturu P, Jana S, Mishra RS, Grant G, Carlson BE. Influence of friction stir processing on the room temperature fatigue cracking mechanisms of A356 aluminum alloy. Mater. Sci. Eng. A, 2018, 716, 165.

[16] Wang LQ, Xie LC, Lü YT, Zhang LC, Chen LY, Meng Q, Qu J, Zhang D, Lu WJ. Microstructure evolution and superelastic behavior in Ti—35Nb—2Ta—3Zr alloy processed by friction stir processing. Acta Mater., 2017, 131, 499.

[17] Porter DA, Easterling KE, Easterling KE. Phase Transformation in Metals and Alloys (Revised Reprint), 2009, Boca Raton, CRC Press

[18] Schulthess TC, Turchi PEA, Gonis A, Nieh TG. Systematic study of stacking fault energies of random Al-based alloys. Acta Mater., 1998, 46(6): 2215.

[19] Morishige T, Hirata T, Uesugi T, Takigawa Y, Tsujikawa M, Higashi K. Effect of Mg content on the minimum grain size of Al—Mg alloys obtained by friction stir processing. Scripta Mater., 2011, 64(4): 355.

[20] Soliman MS. The high-temperature creep behaviour of an Al—1 wt% Cu solid-solution alloy. J. Mater. Sci., 1993, 28(16): 4483.

[21] Mahoney MW, Rhodes CG, Flintoff JG, Bingel WH, Spurling RA. Properties of friction-stir-welded 7075 T651 aluminum. Metall. Mater. Trans. A, 1998, 29(7): 1955.

[22] Martin JW, Doherty RD, Cantor B. Stability of Microstructure in Metallic Systems, 1997, 2nd ed., Cambridge, Cambridge University Press

[23] Adam KF, Long ZD, Field DP. Analysis of particle-stimulated nucleation (PSN)-dominated recrystallization for hot-rolled 7050 aluminum alloy. Metall. Mater. Trans. A, 2017, 48(4): 2062.

[24] Ramesh CS, Keshavamurthy R, Koppad PG, Kashyap KT. Role of particle stimulated nucleation in recrystallization of hot extruded Al 6061/SiC_p composites. Trans. Nonferrous Met. Soc. China, 2013, 23(1): 53.

[25] Verlinden B, Driver JH, Samajdar I, Doherty R. Thermo-Mechanical Processing of Metallic Materials, 2007, Great Britain, Elsevier

[26] Mirjavadi SS, Alipour M, Hamouda AMS, Matin A, Kord S, Afshari BM, Koppad PG. Effect of multi-pass friction stir processing on the microstructure, mechanical and wear properties of AA5083/ZrO₂ nanocomposites. J. Alloys Compd., 2017, 726, 1262.

[27] E. Moustafa, Effect of multi-pass friction stir processing on mechanical properties for AA2024/Al₂O₃ nanocomposites, Materials, 10(2017), No. 9, art. No. 1053.

[28] McNelley TR, Swaminathan S, Su JQ. Recrystallization mechanisms during friction stir welding/processing of aluminum alloys. Scripta Mater., 2008, 58(5): 349.

[29] Azizieh M, Kokabi AH, Abachi P. Effect of rotational speed and probe profile on microstructure and hardness of AZ31/Al₂O₃ nanocomposites fabricated by friction stir processing. Mater. Des., 2011, 32(4): 2034.

[30] Tutunchilar S, Haghpanahi M, Besharati Givi MK, Asadi P, Bahemmat P. Simulation of material flow in friction stir processing of a cast Al—Si alloy. Mater. Des., 2012, 40, 415.

[31] Dowson G. Powder Metallurgy the Process and Its Products, 1990, Bristol, Adam Hilger, 167.

[32] Zhang Q, Xiao BL, Wang WG, Ma ZY. Reactive mechanism and mechanical properties of in situ composites fabricated from an Al-TiO₂ system by friction stir processing. Acta Mater., 2012, 60(20): 7090.

[33] Dieter GE. Mechanical Metallurgy, 1986, New York, McGraw-Hill

[34] Hajizamani M, Alizadeh M. Modification of microstructure and mechanical properties of Al-Zn-Mg/3 wt.% Al₂O₃ composite through semi-solid thermomechanical processing using variable loads. Int. J. Mater. Res., 2017, 108(10): 840.

[35] Humphreys FJ, Hatherly M. Recrystallization textures. Recrystallization and Related Annealing Phenomena, 1995, Amsterdam, Elsevier, 327.

[36] Zhao YH, Liao XZ, Cheng S, Ma E, Zhu YT. Simultaneously increasing the ductility and strength of nanostructured alloys. Adv. Mater., 2006, 18(17): 2280.