Resistance Spot Welding of ZAMAK 12

Year 2020, Volume: 11, 9 - 13, 31.12.2020

Osman Torun Bedri Baksan Ibrahim Celıkyurek

Abstract

Zamak 12 offers high hardness and high tensile strength. This is the preferred alloy for permanent mold applications although it can also be cold-chamber die-cast with excellent results. It combines low temperature melting efficiency and thin wall capabilities with premium mechanical properties. ZA-12 can usually be poured directly into molds designed for aluminum and brass. In this work, the weldability of the ZA-12 alloy using the resistance spot welding technique was investigated. The alloy was melted in a melting furnace and casted in a sand mold. The resistance spot welding processes were carried out using the welding current of 3 kA and the welding times of 30, 40, 50 cycles under the electrode loads of 500 N. The microstructures of the interfaces of welded samples were examined with light optical microscopy (LOM). The tensile-shear tests were carried out at room temperature to determine weld strength. The welding time affected slightly the welding strength. The hardness of the welding zone and matrix was measured. The hardness of the weld interface and base material was similar for all welding conditions.

Keywords

Zamak 12, Hardness, Welding

References

• Ayday A., (2018). Çinko-Alüminyum esaslı ZA-12 alaşımının mikroyapı ve darbe dayanımına bor elementinin etkisi, BAUN Fen Bil. Enst. Dergisi, 20(1), 243-249.
• Bemani M., Pouranvari M. (2020) Microstructure and mechanical properties of dissimilar nickel-based superalloys resistance spot welds, Mater. Sci. Eng. A. 773, 138825.
• Fatile B.O., Adewuyi B.O., and Owoyemi H.T.(2017). Synthesis and characterization of ZA-27 alloy matrix composites reinforced with zinc oxide nanoparticles, Engineering Science and Technology. 11, 47–1154.
• Florea R.S., Solanki K.N., Bammann D.J., Baird J.C., Jordon J.B., Castanier M.P. (2012). Resistance spot welding of 6061-T6 aluminum: Failure loads and deformation. Materials and Design 34, 624–630.
• Kahraman N. (2007). The influence of welding parameters on the joint strength of resistance spot-welded titanium sheets. Mater Des, 28:420–7.
• Niknejad S., Liu L., Lee M., Esmaeili S., Zhou N. Y. (2014). Resistance spot welding of AZ series magnesium alloys: Effects of aluminum content on microstructure and mechanical properties Mater. Sci. Eng. A 618, 323–334.
• Polat B.D.(2009). Zamak alaşımı nedir? Zamaktan nasıl para kazanılır? Metalürji Dergisi, sayı 159.
• Pouranvari M, Marashi SPH (2011). Failure mode transition in AHSS resistance spot welds. Part I. Controlling factors. Mater Sci Eng A; 528:8337–43.
• Qiu R, Iwamoto C, Satonaka S. (2009). Interfacial microstructure and strength of steel/aluminum alloy joints welded by resistance spot welding with cover plate. J Mater Process Technol. 209:4186–93.
• Shirmohammadi D., Movahedi M., Majid P. (2017). Resistance spot welding of martensitic stainless steel: Effect of initial base metal microstructure on weld microstructure and mechanical performance, Mater. Sci. Eng. A 703,154–161.
• Shivakumar, N., Vasu, V., and Narasaiah N. (2017). Processing and dry sliding wear behavior of Al2O3 nanoparticles reinforced ZA-27 composites, Materials Today: Proceedings, 4, 4006–4012.
• Şevik H. (2014). The effect of silver on wear behavior of zinc–aluminum-based ZA-12 alloy produced by gravity casting, Materials Characterization, 89, 81–87.
• Vural M, Akkus A. (2004). On the resistance spot weldability of galvanized interstitial free steel sheets with austenitic stainless steel sheets. J Mater Process Technol, 153–154:1–6.