Analisa Struktur Mikro dan Kekuatan Bending Sambungan Las TIG dengan Perbedaan Kuat Arus Listrik pada Logam Tak Sejenis Aluminium Paduan 5052-Baja Galvanis dengan Filler Al-Si 4043


  • Redi Bintarto Universitas Brawijaya
  • Teguh Dwi Widodo Universitas Brawijaya
  • Rudianto Raharjo Universitas Brawijaya
  • Moh. Syamsul Ma’arif Universitas Brawijaya
  • Francisca Gayuh Utami Dewi Universitas Brawijaya
  • Gesha Denny Pratama Universitas Brawijaya



Heat Input, Electric current, Gas flow rate, Microstructure, Bending strength, Dissimilar Metals


This study aims to determine the various effect of heat input due to varied electric current on microstructure of the weld joints and the bending strength of 2 dissimilar metals (aluminum alloy 5052 and galvanized steel) with Al-Si 4043 as filler. This experimental research was worked out by varying the strength of the current which can then be calculated into a heat input. The current inputs applied were 30.8 J / mm (70A), 35.2 J / mm (80A) and 39.6 J / mm (90A) while the protective gas flow rate used is 14 liters / minute. This study showed that the increase in heat input greatly affects the shape of the weld area microstructure, i.e. the microstructure and bending strength. Greater heat input due to higher current can melt larger area, so that the join process occured better. The highest bending strength at 9.05 Mpa was achieved for heat input at 39.6 J / mm or strong current of 90 A. The weakest bending strength at 8.88 Mpa was achieved for heat input at 35.2 J / mm or a strong current of 70 A.

Author Biography

Redi Bintarto, Universitas Brawijaya

Mech Engineering


IDOWU O.A, OJO M.C.CHATURVEDI., “Effect of heat input on heat affected zone cracking in laser welded ATI Allvac 718 Plus superalloyâ€, Materials Science and Engineering, v. 454–455, pp. 389–397. 2007.

KUMAR S, A.S.SHAHI., “Effect of heat input on the microstructure and mechanical properties of gas tungsten arc welded AISI 304 stainless steel jointsâ€, Materials & Design, v. 32, n. 6, pp. 3617-3623. 2011.

WANG C. et all., “The influence of heat input on microstructure and mechanical properties for dissimilar welding of galvanized steel to 6061 aluminum alloy in a zero-gap lap joint configuration†. Journal of Alloys and Compounds, v. 726, pp. 556-566. 2017.

ALAMSYAH F. A. et all., “Pengaruh Kekasaran Permukaan Terhadap Ketebalan Lapisan Hasil Hot Dipped Galvanizing (HDG)â€, Jurnal Rekayasa Mesin, v. 3, n. 2, pp. 327-336. 2012.

SALAHUDDIN J., “Pengaruh Besar Aliran Gas Terhadap Cacat Porositas dan Struktur Mikro Hasil Pengelasan MIG pada Paduan Aluminium 5083â€, Jurnal ROTOR, v. 4, n. 1, pp. 22-31. 2011.

MOHAMMADPOUR M., “Effect of filler wire composition on performance of Al/Galvanized steel joints by twin spot laser welding-brazing methodâ€, Journal of Manufacturing Processes, v. 31, pp. 20–34. 2017.

KOLARIK L., “Influence of Shielding Gas on Gma Welding of Al Alloysâ€. MM Science, v. 4, pp. 452-453. 2013.

CONIGLIOA. N et all; "Phase formation in 6060/4043 aluminum weld solidification", Materials Science and Engineering: A v. 517, pp. 321-327. 2009.

MEI L, ET ALL., “Influence Of Laser Beam Incidence angle on Laser Lap Welding Quality of Galvanized Steelsâ€, Optics Communications, v. 402, pp. 147-148. 2017.

ZHENG YE., “Microstructure and mechanical properties of 5052 aluminum alloy/mild steel butt joint achieved by MIG-TIG double-sided arc welding-brazingâ€, Materials and Design, v. 123, pp. 69–79. 2017.

ZHANG M. J., “Research on microstructure and mechanical properties of laser keyhole welding–brazing of automotive galvanized steel to aluminum alloyâ€, Materials and Design, v. 45, pp. 24–30. 2012.

KANG. M, KIM. C.L., “Joining Al 5052 alloy to aluminized steel sheet using cold metal transfer process", Materials & Design v. 81, pp. 95-103. 2015.

ZHANG. H, LIU. J.,"Microstructure characteristics and mechanical property of aluminum alloy/stainless steel lap joints fabricated by MIG welding–brazing process", Materials Science and Engineering", v. 528, pp. 6179-6185. 2011.

GEORGES. C ET ALL.,"Absorption/Desorption of Diffusible Hydrogen in Aluminized Boron Steel", ISIJ International v. 53, pp. 1295-1304. 2013.

AWS D1.1/D1.1M., “Structural Welding Code—Steelâ€, American National Standards Institute, pp. 16. 2006.

ASTM A370., “Standart Test Method and Definition for Mechanical Testing Steel Productâ€, ASTM International, 2018.




How to Cite

Bintarto, R., Widodo, T. D., Raharjo, R., Ma’arif, M. S., Dewi, F. G. U., & Pratama, G. D. (2020). Analisa Struktur Mikro dan Kekuatan Bending Sambungan Las TIG dengan Perbedaan Kuat Arus Listrik pada Logam Tak Sejenis Aluminium Paduan 5052-Baja Galvanis dengan Filler Al-Si 4043. Jurnal Rekayasa Mesin, 11(1), pp. 125–131.