The interfacial structure and mechanical properties of Al/Mg joints with and without Zn interlayer by friction stir-induced brazing bond have been investigated. The results revealed that the formation of brittle Al–Mg intermetallics could be effectively suppressed by the addition of Zn interlayer and using appropriate welding parameters, which were replaced by α(Mg)+Mg–Zn and Al–Mg–Zn intermetallic. When rotation speed was further increased, Al–Mg intermetallics were formed again at the interface. The shear strength of Al/Mg joints with Zn interlayer was improved by up to ∼25% in comparison with those of the joints without Zn interlayer. A mixture of ductility and cleavage fracture occurred on fracture surfaces of Zn-added joints which was different from the cleavage fracture feature of the direct joints.
WangJ, FengJC, WangYX.Microstructure of Al–Mg dissimilar weld made by cold metal transfer MIG welding. Mater Sci Technol. 2008; 24(7):827–831. doi: 10.1179/174328408X278411
2.
LiuXJ, HuangRS, WangHY, Improvement of TIG lap weldability of dissimilar metals of Al and Mg. Sci Technol Weld Join. 2007; 12(3):258–260. doi: 10.1179/174329307X173670
3.
LiuP, LiYJ, GengHR, Microstructure characteristics in TIG welded joint of Mg/Al dissimilar materials. Mater Lett. 2007; 61(6):1288–1291. doi: 10.1016/j.matlet.2006.07.010
4.
PatelVK, BholeSD, ChenDL.Microstructure and mechanical properties of dissimilar welded Mg–Al joints by ultrasonic spot welding technique. Sci Technol Weld Join. 2012; 17(3):202–206. doi: 10.1179/1362171811Y.0000000094
5.
ShenJ, LiY, ZhangT, Preheating friction stir spot welding of Mg/Al alloys in various lap configurations. Sci Technol Weld Join. 2015; 20(1):1–10. doi: 10.1179/1362171814Y.0000000248
LuoY, LiJ.Analysis of nugget formation during resistance spot welding on dissimilar metal sheets of aluminum and magnesium alloys. Metal Mater Trans A. 2014; 45(11):5107–5113. doi: 10.1007/s11661-014-2463-2
8.
LiuL, RenD, LiuF.A review of dissimilar welding techniques for magnesium alloys to aluminum alloys. Materials. 2014; 7(5):3735–3757. doi: 10.3390/ma7053735
9.
DaiX, ZhangH, ZhangH, Arc assisted ultrasonic seam welding of Mg/Al joints with Zn interlayer. Mater Sci Technol. 2016; 32(2):164–172. doi: 10.1179/1743284715Y.0000000070
10.
ZhangY, LuoZ, LiY, Microstructure characterization and tensile properties of Mg/Al dissimilar joints manufactured by thermo-compensated resistance spot welding with Zn interlayer. Mater Des. 2015; 75:166–173. doi: 10.1016/j.matdes.2015.03.030
11.
BalasundaramR, PatelVK, BholeSD, Effect of zinc interlayer on ultrasonic spot welded aluminum-to-copper joints. Mater Sci Eng A. 2014; 607:277–286. doi: 10.1016/j.msea.2014.03.135
12.
DaiXY, ZhangH, WangBT, Improving weld strength of arc-assisted ultrasonic seam welded Mg/Al joint with Sn interlayer. Mater Des. 2016; 98:262–271. doi: 10.1016/j.matdes.2016.02.095
13.
NasiriAM, ZhouY.Effect of Zn interlayer on brazeability of AZ31B–Mg alloy to steel sheet. Sci Technol Weld Join. 2015; 20(2):155–163. doi: 10.1179/1362171814Y.0000000264
14.
DaiX, ZhangH, ZhangH, Joining of magnesium and aluminum via arc-assisted ultrasonic seam welding with Sn/Zn composite interlayer. Mater Lett. 2016; 178:235–238. doi: 10.1016/j.matlet.2016.04.064
15.
PatelVK, BholeSD, ChenDL.Improving weld strength of magnesium to aluminium dissimilar joints via tin interlayer during ultrasonic spot welding. Sci Technol Weld Join. 2012; 17(5):342–347. doi: 10.1179/1362171812Y.0000000013
16.
WangY, LuoG, ZhangJ, Microstructure and mechanical properties of diffusion-bonded Mg–Al joints using silver film as interlayer. Mater Sci Eng A. 2013; 559:868–874. doi: 10.1016/j.msea.2012.09.035
17.
PennerP, LiuL, GerlichA, Feasibility study of resistance spot welding of dissimilar Al/Mg combinations with Ni based interlayers. Sci Technol Weld Join. 2013; 18(7):541–550. doi: 10.1179/1362171813Y.0000000129
18.
RobsonJ, PanteliA, PrangnellPB.Modelling intermetallic phase formation in dissimilar metal ultrasonic welding of aluminium and magnesium alloys. Sci Technol Weld Join2012; 17(6):447–453.
19.
JinYH, GanRG, LiCF, Growth kinetics of Al–Mg intermetallics during post-weld annealing treatment. Mater Sci Technol. 2016. DOI:10.1080/02670836.2015.1138031.
20.
SatoYS, ShiotaA, KokawaH, Effect of interfacial microstructure on lap shear strength of friction stir spot weld of aluminium alloy to magnesium alloy. Sci Technol Weld Join. 2010; 15(4):319–324. doi: 10.1179/136217109X12568132624208
21.
LiangZY, ChenK, WangXN, Effect of tool offset and tool rotational speed on enhancing mechanical property of Al/Mg dissimilar FSW joints. Metal Mater Trans A. 2013; 44(8):3721–3731. doi: 10.1007/s11661-013-1700-4
22.
MofidMA, Abdollah-ZadehA, GürCH.Investigating the formation of intermetallic compounds during friction stir welding of magnesium alloy to aluminum alloy in air and under liquid nitrogen. Int J Adv Manuf Technol. 2014; 71(5):1493–1499. doi: 10.1007/s00170-013-5565-x
23.
SatoYS, ParkSHC, MichiuchiM, Constitutional liquation during dissimilar friction stir welding of Al and Mg alloys. Scr Mater. 2004; 50(9):1233–1236. doi: 10.1016/j.scriptamat.2004.02.002
24.
JieJC, ZouCM, WangHW, Thermal stability of Al–Mg alloys after solidification under high pressures. J Alloy Compd. 2014; 584:507–513. doi: 10.1016/j.jallcom.2013.09.106
25.
PanteliA, RobsonJD, BroughI, The effect of high strain rate deformation on intermetallic reaction during ultrasonic welding aluminium to magnesium. Mater Sci Eng A. 2012; 556:31–42. doi: 10.1016/j.msea.2012.06.055
26.
TakeuchiA, InoueA.Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element. Mater Trans. 2005; 46:2817–2819. doi: 10.2320/matertrans.46.2817
27.
LiuLM, ZhaoLM, XuRZ.Effect of interlayer composition on the microstructure and strength of diffusion bonded Mg/Al joint. Mater Des. 2009; 30(10):4548–4551. doi: 10.1016/j.matdes.2009.04.040
28.
GaoQ, WangK.Influence of Zn interlayer on interfacial microstructure and mechanical properties of TIG lap-welded Mg/Al joints. J Mater Eng Perform. 2016; 25(3):756–763. doi: 10.1007/s11665-016-1899-5
29.
LiuLM, ZhaoLM, WuZH.Influence of holding time on microstructure and shear strength of Mg-Al alloys joint diffusion bonded with Zn-5Al interlayer. Mater Sci Technol. 2011; 27(9):1372–1376. doi: 10.1179/026708310X12699498462887
30.
ZhangHT, DaiXY, FengJC.Joining of aluminum and magnesium via pre-roll-assisted A-TIG welding with Zn interlayer. Mater Lett. 2014; 122:49–51. doi: 10.1016/j.matlet.2014.02.008
31.
VillarsP, PrinceA, OkamotoH.Handbook of ternary alloy phase diagrams. Materials Park, OH: ASM International; 1995.
