Spot joining of AA 5754 and high strength steel sheets by consumable bit

Abstract

Spot joining of dissimilar metal alloys is difficult because of differences in melting temperature as well as differences in composition. If a fusion welding process like resistance spot welding is employed, then alloys mix in the fusion zone and can create brittle intermetallic compounds during solidification. When self-piercing riveting (SPR) is used, the alloys to be joined must be ductile enough to be formed around the rivet. In this paper, a new approach to joining dissimilar metal alloys has been studied, where a consumable bit has been used to create a spot joint between dissimilar alloys. The resulting joint has both metallurgical and mechanical bonding characteristics and can be made between very soft and very hard alloys, like dual phase (DP) 590 and DP 980 and light metals like AA 5754. Lap shear strengths of joints made by friction bit joining (FBJ) are similar to or better than comparable joints made by self-piercing riveting.

Keywords

ALUMINIUM HIGH STRENGTH STEEL SPOT JOINING DISSIMILAR ALLOYS

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References

Sun

, Stephens

E. V.

, Khaleel

M. A.

, Shao

and Kimshi

: ‘Resistance spot welding of aluminum alloy to steel with transition material – from process to performance. Part I: Experimental study’, Weld. J., 2004, 83, 188s–195s.

Yasuyama

, Fukui

, Ogawa

and Taka

: ‘Spot welding of aluminum and steel sheet with insert of aluminum clad steel sheet’, Sumitomo Met., 1996, 48, (4), 87–95.

Yasuyama

, Fukui

, Ogawa

and Taka

: ‘Spot welding of aluminum and steel sheet with insert of aluminum clad steel sheet, Sumitomo Met., 1996, 48, (4), 87–95.

Gendo

, Katsuya

and Motoyasu

: ‘Development of spot friction welding’, J. Jpn Inst. Met., 2006, 70, (11), 870–873.

Lee

C.-Y.

, Choi

D.-H.

, Yeon

Y.-M.

and Jung

S.-B.

: ‘Dissimilar friction stir spot welding of low carbon steel and Al-Mg alloy by formation ofIMCs’, Sci. Technol. Weld. Join., 2009, 14, (3), 216–220.

Gendo

, Nishiguchi

, Asakawa

and Tanioka

: ‘Spot friction welding of aluminum to steel’, Proc. SAE 2007 World Cong., Detroit, MI, USA, April 2007, SAE, Paper 2007-01–1703.

Han

and Chrysanthou

: ‘Evaluation of quality and behavior of self-piercing riveted aluminum to high strength low alloy sheets with different surface coatings’, Mater. Des., 2008, 29, 458–468.

Han

, Chrysanthou

and Young

K. W.

: ‘Mechanical behavior of self-piercing riveted multi-layer joints under different specimen configurations’, Mater. Design, 2008, 28, 2024–2033.

Sun

and Khaleel

M. A.

: ‘Strength estimation of self-piercing rivets using lower bound limit load analysis’, Sci. Technol. Weld. Join., 2005, 10, (5), 624–625.

10.

Abe

, Kato

and Mori

: ‘Joinability of aluminium alloy and mild steel sheets by self piercing rivet’, J. Mater. Process. Technol., 2006, 177, 417–421.

11.

Miles

M. P.

, Kohkonen

, Packer

, Steel

, Siemssen

and Sato

Y. S.

: ‘Solid state spot joining of sheet materials using consumable bit’, Sci. Technol. Weld. Join., 2009, 14, (1), 72–77.

12.

Miles

M. P.

, Kohkonen

, Weickum

and Feng

: ‘Friction bit joining of dissimilar material combinations of high strength steel DP 980 and Al alloy AA 5754’, Proc. 2009 SAE World Cong., Detroit, MI, USA, April 2009, SAE, Paper 09M-0232, 1–3.