Abstract
The ability to weld aluminum and steel sheets depends strongly on the formation of intermetallic phases; a process that is, in turn, controlled by the interdiffusion of iron and aluminum across the welded interface. Understanding the interdiffusion behavior, and how it is influenced by tertiary elements such as manganese, will allow for better prediction of the properties of the spot weld. Hence, interdiffusion coefficients and activation energies for interdiffusion were determined in the α solid solution and B2 intermetallic phases of Fe-Al alloys in the presence of 1.5-2 at.% manganese with pseudo-binary diffusion couples investigated at 900-1095 °C. The interdiffusion coefficients in α were found to increase in the presence of Mn at all temperatures compared with those reported in the binary Fe-Al alloys. The activation energies for interdiffusion in α are correspondingly lower than those in the binary Fe-Al alloys. The increase in the main interdiffusion coefficients in the presence of Mn indicates that diffusional interactions between Fe and Al are increased in the presence of Mn. The expected increase in diffusional interactions of Fe and Al are found to be consistent with the thermodynamic interactions between Fe and Al in the binary Fe-Al and ternary Fe-Al-Mn system as estimated from the literature. The presence of Mn is found to decrease the solubility of Al in the α solid solution, which, in turn, is expected to decrease the growth rate of the intermetallic at the interface between steel and aluminum.
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References
G. Sierra, P. Peyre, F. Deschaux-Beaume, D. Stuart, and G. Fras, Steel to Aluminum Key-Hole Laser Welding, Mater. Sci. Eng. A, 2007, 447A, p 197-208
E. Taban, J.E. Gould, and J.C. Lippold, Dissimilar Friction Welding of 6061-T6 Aluminum and AISI, 1018 Steel: Properties and Microstructural Characterization, Mater. Des., 2010, 31, p 2305-2311
K. Shibata, S. Morozumi, and S. Koda, Formation of the Alloy Layer in the Fe-Al Diffusion Couple, J. Jpn. Inst. Met., 1966, 30, p 382-388
S. Kobayashi and T. Yakou, Control of Intermetallic Compound Layers at Interface Between Steel and Aluminum by Diffusion-Treatment, Mater. Sci. Eng. A, 2002, 338(1-2), p 44-53
M.V. Akdeniz, A.O. Mekharbov, and T. Yilmaz, The Role of Si Addition on the Interfacial Interaction in Fe-Al Diffusion Layer, Scr. Metall. Mater., 1994, 31(12), p 1723-1728
A. Hirose, H. Imaeda, M. Kondo, and K.F. Kobayashi, Influence of Alloying Elements on Interfacial Reaction and Strength of Aluminum/Steel Dissimilar Joints for Light Weight Car Body, Mater. Sci. Forum, 2007, 539-543, p 3888-3893
M.V. Akdeniz and A.O. Mekharbov, The Effect of Substitutional Impurities on the Evolution of Fe-Al Diffusion Layer, Acta Mater., 1998, 46(4), p 1185-1192
M.A. Dayananda and C.W. Kim, Zero-Flux Planes and Flux Reversals in Cu-Ni-Zn Diffusion Couples, Metall. Trans. A, 1979, 10, p 1333-1339
K.N. Kulkarni, A.M. Girgis, L.R. Ram-Mohan, and M.A. Dayananda, A Transfer Matrix Analysis of Quaternary Diffusion, Philos. Mag., 2007, 87, p 853-872
K. Kulkarni and G.P.S. Chauhan, Investigations of Quaternary Interdiffusion in a Constituent System of High Entropy Alloys, AIP Adv., 2015, 5, p 097162 1-097162 7
K. Nishida, T. Yamamoto, and T. Nagata, On the Interdiffusion in α-Solid Solution of the Fe-Al System in Al Vapor, Trans. Jpn. Inst. Met., 1971, 12, p 310-316
Y.H. Sohn and M.A. Dayananda, Interdiffusion, Intrinsic Diffusion and Vacancy Wind Effect in Fe-Al Alloys at 1000 °C, Scripta Mater., 1998, 40(1), p 79-84
M. Salamon, D. Fuks, and H. Mehrer, Interdiffusion and Al Self-Diffusion in Iron Aluminides, Defects Diffus. Forum, 2005, 237-240, p 444-449
L. Onsager, Theories and Problems of Liquid Diffusion, Ann. N. Y. Acad. Sci., 1945, 46, p 241-265
A. Paul, A Pseudobinary Approach to Study Interdiffusion and the Kirkendall Effect in Multicomponent Systems, Philos. Mag., 2013, 93(18), p 2297-2315
MultiDiflux: M. A. Dayananda and L. R. Ram-Mohan, Purdue University, 2006, https://engineering.purdue.edu/MSE/FacStaff/Faculty/dayananda.wshtml
U.R. Kattner, “Aluminum-Iron Binary Alloy Phase Diagram”, in Binary Alloy Phase Diagrams (ASM International, Materials Park, 1990), p. 147
J.S. Kirkaldy and D.J. Young, “Diffusion in Condensed State,” Institute of Metals, 1987.
P.D. Desai, Thermodynamic Properties of Selected Binary Aluminum Alloy Systems, J. Phys. Chem. Ref. Data, 1987, 16(1), p 109-124
R. Umino, X.J. Liu, Y. Sutou, C.P. Wang, I. Ohnuma, R. Kainuma, and K. Ishida, Experimental Determination and Thermodynamic Calculation of Phase Equilibria in the Fe-Mn-Al System, J. Phase Equilib. Diffus., 2006, 27(1), p 54-62
R.D. Sisson and M.A. Dayananda, Diffusion Structures in Multiphase Cu-Ni-Zn Couples, Metallurg. Trans., 1972, 3(3), p 647-651
B. Dangi, “Effect of Ternary Alloying Elements on Growth Kinetics of Intermetallic Layers Formed at the interface of iron and Al6061 Aluminum Alloy”. Master’s Thesis; Indian Institute of Technology Kanpur, 2016
T. DebRoy and S.A. Davis, Physical Processes in Fusion Welding, Rev. Mod. Phys., 1995, 67A(1), p 85-112
A. Fellman and V. Kujanpaa, The effect of Shielding Gas Composition on Welding Performance and Weld Properties in Hybrid CO2 Laser-Gas Metal Arc Welding of Carbon Manganese Steel, J. Laser Appl., 2006, 18(1), p 12-20
Acknowledgments
General Motors is acknowledged for financially supporting this work. Blair Carlson and David Sigler are both appreciated for discussions and support for experimental methods and motivations for this work. Mr. Siva Kumar and Mr. Parikshit Yadav from Advanced Center for Materials Sciences (ACMS) at IIT Kanpur are acknowledged for facilitating the EPMA usage. Authors are thankful to Prof. Dayananda from Purdue University for useful discussions.
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Tripathi, S., Verma, V., Brown, T.W. et al. Effect of Small Amount of Manganese on the Interdiffusivities in Fe-Al Alloys. J. Phase Equilib. Diffus. 38, 135–142 (2017). https://doi.org/10.1007/s11669-017-0529-8
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DOI: https://doi.org/10.1007/s11669-017-0529-8