The present research was aimed at simultaneous increase in strength and fracture energy of friction stir spot weld of Al-5083 alloy via reinforcing by Fe3O4 nanoparticles. Compared to non-reinforced welds, failure load and fracture energy of reinforced welds increased up to ∼115 and 560%, respectively. These findings were discussed in the light of grain refinement as well as considerable increase in hardness of fracture location due to the presence of sub-micron and nano reinforcing particles (RPs). Fe3O4 nanoparticles were transformed to Al–Fe intermetallics due to their small size and heat generated during the welding process. The stir zone of reinforced welds consisted of three different grain structures among which the finest one was related to the composite structure containing well-distributed RPs in the aluminium matrix.
WangDA, ChaoCW, LinPC, Mechanical characterization of friction stir spot microwelds. J Mater Process Technol. 2010; 210(14):1942–1948. doi: 10.1016/j.jmatprotec.2010.07.005
6.
WangDA, LeeSC.Microstructures and failure mechanisms of friction stir spot welds of aluminum 6061-T6 sheets. J Mater Process Technol. 2007; 186(1):291–297. doi: 10.1016/j.jmatprotec.2006.12.045
7.
ThoppulSD, GibsonRF.Mechanical characterization of spot friction stir welded joints in aluminum alloys by combined experimental/numerical approaches: part I: micromechanical studies. Mater Charact. 2009; 60(11):1342–1351. doi: 10.1016/j.matchar.2009.06.011
8.
JeonCS, JeongYH, HongST, Mechanical properties of graphite/aluminum metal matrix composite joints by friction stir spot welding. J Mech Sci Technol. 2014; 28(2):499–504. doi: 10.1007/s12206-013-1153-0
9.
TebyaniSF, DehghaniK.Effects of SiC nanopowders on the mechanical properties and microstructure of interstitial free steel joined via friction stir spot welding. Mater Des. 2016; 90:660–668. doi: 10.1016/j.matdes.2015.11.016
10.
PaidarM, SarabML.Friction stir spot welding of 2024-T3 alumimum alloy with SiC nanoparticles. J Mech Sci Technol. 2016; 30(1):365–370. doi: 10.1007/s12206-015-1241-4
11.
HongST, DasH, OhHS, Combination of nano-particle deposition system and friction stir spot welding for fabrication of carbon/aluminum metal matrix composite joints of dissimilar aluminum alloys. CIRP Ann Manuf Technol. 2017; 66:261–264. doi: 10.1016/j.cirp.2017.04.115
KhorramiMS, KazeminezhadM, KokabiAH.The effect of SiC nanoparticles on the friction stir processing of severely deformed aluminum. Mater Sci Eng A. 2014; 602:110–118. doi: 10.1016/j.msea.2014.02.067
14.
HsuCJ, ChangCY, KaoPW, Al–Al3 Ti nanocomposites produced in situ by friction stir processing. Acta Mater. 2006; 54(19):5241–5249. doi: 10.1016/j.actamat.2006.06.054
15.
AziziehM, KokabiAH, AbachiP.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):2034–2041. doi: 10.1016/j.matdes.2010.11.055
16.
GaskellDR.Introduction to the thermodynamics of materials. New York (NY): CRC Press; 2008.
17.
MishraRS, MaZY.Friction stir welding and processing. Mater Sci Eng R Rep. 2005; 50:1–78. doi: 10.1016/j.mser.2005.07.001
18.
FoulkesFR.Physical chemistry for engineering and applied sciences. Boca Raton (FL): CRC Press; 2012.
19.
LeeJM, KangSB, SatoT, Evolution of iron aluminide in Al/Fe in situ composites fabricated by plasma synthesis method. Mater Sci Eng A. 2003; 362(1):257–263. doi: 10.1016/S0921-5093(03)00639-7
20.
EftekhariM, MovahediM, KokabiAH.Microstructure, strength, and wear behavior relationship in Al-Fe3O4 nanocomposite produced by multi-pass friction stir processing. J Materi Eng Perform. 2017. doi: 10.1007/s11665-017-2752-1
21.
SpringerH, KostkaA, dos SantosJF, Influence of intermetallic phases and Kirkendall-porosity on the mechanical properties of joints between steel and aluminium alloys. Mater Sci Eng A. 2011; 528:4630–4642. doi: 10.1016/j.msea.2011.02.057
22.
LeeIS, KaoPW, HoNJ.Microstructure and mechanical properties of Al–Fe in situ nanocomposite produced by friction stir processing. Intermetallics. 2008; 16:1104–1108. doi: 10.1016/j.intermet.2008.06.017
23.
MovahediM, KokabiAH, SeyedReihaniSM, Growth kinetics of Al–Fe intermetallic compounds during annealing treatment of friction stir lap welds. Mater Charact. 2014; 90:121–126. doi: 10.1016/j.matchar.2014.01.023
24.
ZhangZ, YangX, ZhangJ, Effect of welding parameters on microstructure and mechanical properties of friction stir spot welded 5052 aluminum alloy. Mater Des. 2011; 32(8):4461–4470. doi: 10.1016/j.matdes.2011.03.058
25.
ShenZ, YangX, ZhangZ, Microstructure and failure mechanisms of refill friction stir spot welded 7075-T6 aluminum alloy joints. Mater Des. 2013; 44:476–486. doi: 10.1016/j.matdes.2012.08.026
26.
MalafaiaAM, MilanMT, OliveiraMF, Fatigue behavior of friction stir spot welding and riveted joints in an Al alloy. Procedia Eng. 2010; 2(1):1815–1821. doi: 10.1016/j.proeng.2010.03.195
27.
MerzougM, MazariM, BerrahalL, Parametric studies of the process of friction spot stir welding of aluminium 6060-T5 alloys. Mater Des. 2010; 31(6):3023–3028. doi: 10.1016/j.matdes.2009.12.029
28.
YuanW, MishraRS, WebbS, Effect of tool design and process parameters on properties of Al alloy 6016 friction stir spot welds. J Mater Process Technol. 2011; 211(6):972–977. doi: 10.1016/j.jmatprotec.2010.12.014
29.
BadarinarayanH, YangQ, ZhuS.Effect of tool geometry on static strength of friction stir spot-welded aluminum alloy. Int J Mach Tool Manuf. 2009; 49(2):142–148. doi: 10.1016/j.ijmachtools.2008.09.004
30.
BadarinarayanH, ShiY, LiX, Effect of tool geometry on hook formation and static strength of friction stir spot welded aluminum 5754-O sheets. Int J Mach Tool Manuf. 2009; 49(11):814–823. doi: 10.1016/j.ijmachtools.2009.06.001
