The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint

In this work, the microstructure and growth behavior of Al-Fe intermetallic compounds (IMCs), which formed at interface of weld steel-aluminum joint, are successfully analyzed via the combination of experiment and physical model. A layer IMCs consists of Fe2Al5 and Fe4Al13, in which the Fe2Al5 is the main compound in the layer. The IMCs layer thickness increases with the increase of the heat input and the maximum thickness of IMCs layer is 22 ± 2 μm. The high vacancy concentration of Fe2Al5 IMCs provides the diffusion path for Al atoms to migrate through the IMCs layer for growing towards to steel substrate. By using the calculated temperature profiles as inputs, the combined 2D cellular automata (CA)-Monte Carlo (MC) model is applied to simulate the grain distribution and interfacial morphology evolution at the Al-steel interface. This 2D model simulates the IMCs nucleation, growth, and solute redistribution. The numerical results are in good agreement with the experimental results, suggesting that the growth process can be divided four stages, and the thickness of the Fe2Al5 layer increases nonlinearly with the increase of the growth time. The whole nucleation and growth process experienced 1.7~2 s, and the fastest growth rate is 8 μm/s. The addition of Si element will influence diffusion path of Al atom to form different interface morphology. The effects of peak temperature, cooling time, and the thermal gradient on the IMCs thickness are discussed. It shows that the peak temperature has the major influence on the IMCs thickness.

[1]  E. Povoden-Karadeniz,et al.  Formation of long-range ordered intermetallic η'" phase and the involvement of silicon during welding of aluminum-steel sheets , 2022, Materials Characterization.

[2]  J. Li,et al.  Monte Carlo simulations of solidification and solid-state phase transformation during directed energy deposition additive manufacturing , 2022, Progress in Additive Manufacturing.

[3]  H. Fang,et al.  Multi-scale simulation of solidification behavior and microstructure evolution during vacuum electron beam welding of Al-Cu alloy , 2021 .

[4]  Liming Liu,et al.  Bonding mechanism of Al/steel interface formed by laser-TIG welding assisted riveting technology , 2020 .

[5]  Y. Natsume,et al.  Cellular automaton modelling to predict multi-phase solidification microstructures for Fe-C peritectic alloys , 2020, IOP Conference Series: Materials Science and Engineering.

[6]  D. Fan,et al.  Residual stress and welding distortion of Al/steel butt joint by arc-assisted laser welding-brazing , 2019, Transactions of Nonferrous Metals Society of China.

[7]  D. Fan,et al.  Arc-Assisted Laser Welding Brazing of Aluminum to Steel , 2019, Metals.

[8]  P. Matteis,et al.  Review of Aluminum-To-Steel Welding Technologies for Car-Body Applications , 2019, Metals.

[9]  A. Das,et al.  Laser and Gas Metal Arc Based Dissimilar Joining of Automotive Aluminium Alloys and Steel Sheets - A Review , 2018, Journal of Welding and Joining.

[10]  B. Carlson,et al.  Microstructural and mechanical evolution of Al/steel interface with Fe2Al5 growth in resistance spot welding of aluminum to steel , 2018, Journal of Manufacturing Processes.

[11]  Hui Chen,et al.  Effects of heat input on wettability, interface microstructure and properties of Al/steel butt joint in laser-metal inert-gas hybrid welding-brazing , 2018 .

[12]  Xingke Zhao,et al.  Nanoscale structures of the interfacial reaction layers between molten aluminium and solid steel based on thermophysical simulations , 2018 .

[13]  Liqun Li,et al.  In Situ SEM Observations of Fracture Behavior of Laser Welded–Brazed Al/Steel Dissimilar Joint , 2018, Journal of Materials Engineering and Performance.

[14]  J. Robson,et al.  The Influence of Grain Structure on Intermetallic Compound Layer Growth Rates in Fe-Al Dissimilar Welds , 2018, Metallurgical and Materials Transactions A.

[15]  Yutaka S. Sato,et al.  Strength Improvement Through Grain Refinement of Intermetallic Compound at Al/Fe Dissimilar Joint Interface by the Addition of Alloying Elements , 2018, Metallurgical and Materials Transactions A.

[16]  Xinyu Shao,et al.  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 , 2017 .

[17]  Jihua Huang,et al.  Growth kinetics and thickness prediction of interfacial intermetallic compounds between solid steel and molten aluminum based on thermophysical simulation in a few seconds , 2017 .

[18]  Zhilong Cheng,et al.  Microstructure and mechanical properties of 5052 aluminum alloy/mild steel butt joint achieved by MIG-TIG double-sided arc welding-brazing , 2017 .

[19]  Hua Zhang,et al.  Microstructure and mechanical properties of pulsed laser welded Al/steel dissimilar joint , 2016 .

[20]  N. Takata,et al.  Crystallography of Fe2Al5 phase at the interface between solid Fe and liquid Al , 2015 .

[21]  Wei Guo,et al.  Control of interfacial intermetallic compounds in Fe–Al joining by Zn addition , 2015 .

[22]  N. Mcpherson,et al.  Effect of Laser Processing Parameters on the Formation of Intermetallic Compounds in Fe-Al Dissimilar Welding , 2014, Journal of Materials Engineering and Performance.

[23]  Radovan Kovacevic,et al.  Dissimilar joining of galvanized high-strength steel to aluminum alloy in a zero-gap lap joint configuration by two-pass laser welding , 2014 .

[24]  M. Ishak,et al.  Review of Research Progress on Aluminum–Steel Dissimilar Welding , 2014 .

[25]  A. Kouadri-David.  Study of metallurgic and mechanical properties of laser welded heterogeneous joints between DP600 galvanised steel and aluminium 6082 , 2014 .

[26]  D. Raabe,et al.  On the Correlation Between Thermal Cycle and Formation of Intermetallic Phases at the Interface of Laser‐Welded Aluminum‐Steel Overlap Joints , 2012 .

[27]  W. Cheng,et al.  Effect of silicon on the formation of intermetallic phases in aluminide coating on mild steel , 2011 .

[28]  Y. Budkin.  Welding joints in dissimilar metals , 2011 .

[29]  J. Iqbal,et al.  Variables affecting growth and morphology of the intermetallic layer (Fe2Al5) , 2011 .

[30]  Dierk Raabe,et al.  On the formation and growth of intermetallic phases during interdiffusion between low-carbon steel and aluminum alloys , 2011 .

[31]  U. Kattner,et al.  An assessment of the entire Al–Fe system including D03 ordering , 2009 .

[32]  Gul Hameed Awan,et al.  The morphology of coating/substrate interface in hot-dip-aluminized steels , 2008 .

[33]  Chengwu Zheng,et al.  Growth modes of individual ferrite grains in the austenite to ferrite transformation of low carbon steels , 2007 .

[34]  Peng He,et al.  Interfacial microstructure and mechanical properties of aluminium-zinc-coated steel joints made by a modified metal inert gas welding-brazing process , 2007 .

[35]  M. Kajihara,et al.  Growth behavior of Fe2Al5 during reactive diffusion between Fe and Al at solid-state temperatures , 2007 .

[36]  S. Marya,et al.  Steel-to-Aluminum Joining by Control of Interface Microstructures - Laser-Roll Bonding and Magnetic Pulse Welding - , 2007 .

[37]  M. Kajihara.  Quantitative Evaluation of Interdiffusion in Fe2Al5 during Reactive Diffusion in the Binary Fe-Al System , 2006 .

[38]  S. Kumai,et al.  Characterization of Intermetallic Compound Layer Formed at the Weld Interface of the Defocused Laser Welded Low Carbon Steel/6111 Aluminum Alloy Lap Joint , 2006 .

[39]  E. Schubert,et al.  Light-weight structures produced by laser beam joining for future applications in automobile and aerospace industry , 2001 .

[40]  H. Mehrer,et al.  Diffusion in intermetallic phases of the Fe-Al system , 2000 .

[41]  F. Sommer,et al.  Thermodynamics of liquid Al–Fe alloys , 2000 .

[42]  U. Burkhardt,et al.  Structure refinement of the iron–aluminium phase with the approximate composition Fe2Al5 , 1994 .

[43]  A. Dinsdale.  SGTE data for pure elements , 1991 .

[44]  W. Read,et al.  Dislocation Models of Crystal Grain Boundaries , 1950 .

[45]  Norbert Enzinger,et al.  Joining of Aluminum and Steel in Car Body Manufacturing , 2011 .

[46]  F. Vollertsen,et al.  Effect of Thermal Cycle on the Formation of Intermetallic Compounds in Laser Welding of Aluminum-Steel Overlap Joints , 2011 .