The application of combustion synthesis reactions in Ni-Ti system in the joining of steel to tungsten carbide

Subject Areas : journal of New Materials

Alireza Karimi ¹ , Mandana Adeli ² , Mansour Soltanieh ³

1 - School of Metallurgy and Materials Engineering, Iran University of Science and Technology
2 - School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
3 - Iran University of Science and Technology

Received: 2020-06-13 Accepted : 2021-01-11 Published : 2020-11-21

Keywords: Combustion Synthesis, Steel-tungsten carbide joints, Exothermic reaction, NiTi intermetallic compound,

Abstract :

In this study, the possibility of establishing steel/tungsten carbide joints via a novel method based on combustion synthesis process was studied. An experimental setup was designed for rapid heating and ignition of a cylindrical sample composed of compressed, exothermic mixture of Ni and Ti powders. The sample was placed as the bonding intermediate between steel-WC parts. The combustion reaction resulted in the formation of NiTi intermetallic compound, which was melted down and attached to both steel and WC parts. To prepare the green samples, Ni and Ti powders were weighed out to a molar ratio of Ni:Ti=1:1, and cold-pressed. The heating and ignition of the samples were carried out using inductive heating. After the joining was accomplished, the samples were cut in halves and characterized using XRD and SEM-EDS techniques. The analyses showed the formation of NiTi as the main phase as the product of synthesis. The elemental composition profile across the interfacial regions proved the diffusion of tungsten and cobalt elements in NiTi bonding layer and interdiffusion of titanium and nickel. Examination of X-ray maps within the joint confirmed the accumulation of nickel and tungsten in the carbide/NiTi joint and titanium and iron elements in the steel/NiTi joint due to high process temperature, accelerated diffusion, and bond formation at the joint. The results showed that by using the combustion synthesis reactions for the formation of NiTi compound, it is possible to establish acceptable joints between tungsten carbide and steel via an intermediate layer of NiTi.

References:

نتیجهیآنالیزEDSخطیازفصلمشترکفولاد /NiTiدر قسمت (د) از شکل 1References:[1] A. S. Mukasyan, J. D. E. White, “Combustion Joining of Refractory Materials” Int. J. Self. Propag. High Temp. Synth. 2007, 16(3), 154–168.]4[م ،بدرلو ،س. ع. طیبی فرد، م. ذاکری، سنتزنانوکامپوزیت(MoSi2-20%TiC )بهروشسنتزاحتراقیخودگسترفعالشدهمکانیکی(MASHS) ،مواد نوین ،دوره7، شماره45،پاییز 9315 ص ،86-79.]3[آ، کریمی، ح. بهاروندی، ح. عبدیزاده، بررسیتأثیرمقدارومنبعکربنبرسنتزنانوساختارTi2AlCبهروشسنتزخوداحتراقیدمابالا، مواد نوین، دوره8 ،شماره41، پاییز 9316 ص ،68-57.[4] H. Kalantari, M. Adeli, M. R. Aboutalebi, “Investigation of the Effect of Foaming Agent on the Fabrication of NiTi Foams Using the Self-Propagating, High-Temperature Synthesis Process”, Met. Mater. Trans. B. 2019, 50, 2566–2573.[5] I. Voiculescu1, V. Geanta, H. Binchiciu, D. Iovanas, R Stefanoiu, “Dissimilar Brazed Joints betweenSteel NiTiFeSteelNiTi

992استفاده از واکنشسنتزاحتراقی ترکیب بینفلزی NiTiجهت اتصالفولادبه کاربیدتنگستنand Tungsten Carbide”, IOP Conf. Series: Materials Science and Engineering 209 (2017) 1-7. [6] A. Elrefaey, A. Monem, W. Tillmann. “Microstructure and Mechanical Properties of Brazed Titanium/Steel Joints” J.Materials Sci. 2007, 42(23), 9553-9558.[7] V. A. Shcherbakov, “SHS Welding of Hard Alloy and Steel”, Key Eng. Mater. 2002, 217, 215-218.[8] N. Farjam, M. Nematollahi, M. Taheri-Andani, M. J. Mahtabi, M. Elahinia, “Effects of Size and Geometry on the Thermomechanical Properties of Additively Manufactured NiTi Shape Memory Alloy”, Int. J. Adv. Manuf. Tech. 2020, 107, 3145–3154.[9] H. C. Yi, J. J. Moore, “Combustion Synthesis of TiNi Intermetallic Compounds, Part III Microstructural Characterization”,J. Mater. Sci. 1992, 27, 5067-5072.[10] E. Dong, W.Yu, Q. Cai, L. Cheng, Z. Ning, J. Shi, “High-Temperature Deformation Behavior of TiNi-Nb Hypoeutectic Alloy”, Mater. Sci. Eng. A. 2019, 764, 138228.[11] C. Velmurugan, V. Senthilkumar, P. S. Kamala, “Microstructure and Corrosion Behavior of NiTi Shape Memory Alloys Sintered in the SPS Process”, Int. J. Min. Met. Mater., 2019, 26, 1311-1321.[12] K. Morsi, “The Diversity of Combustion Synthesis Processing: A Review”, J. Mater. Sci., 2012, 47, 68-92.[13] B. Ma, X. Wang, C. Chen, D. Zhou, P. Xu, X. Zhao, “Dissimilar Welding and Joining of Cemented Carbides”, Metals 2019, 9, 1-21