Термічно індуковане хімічне зварювання плівок на основі епоксиду

1. Vakulenko I.O. Influence of chemical compounds on the forming of welding arc / I.O. Vakulenko, S.O. Plitchenko, D.M. Makarevich // Science and transport progress. – 2014. - №5. – Р. 92-100Chemical welding is a relatively new welding approach resulting from chemical reactions that occur at the interface opens the way towards assembly epoxybased materials without adhesives or moldsХімічне зварювання є відносно новим підходом до зварювання, який базується на хімічних реакціях, які перебігають на межі розділу фаз, і відкриває можливість монтажу епоксидних матеріалів без клеїв та форм

Optimization of the pulsed arc welding parameters for wire arc additive manufacturing in austenitic steel applications

© 2022, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.Industrial development continues to present challenges for manufacturers. One of them is additive manufacturing (AM) with metallic materials. One promising solution is wire arc additive manufacturing (WAAM). Currently, WAAM is a more promising tool for developers, firstly due to the simplicity of its realization and secondly for its cost-effectiveness. Building materials are represented by welding wires, so the deposition rate is favorable. A pulse power source is commonly used in this scheme of realization. Much less attention has been paid to the optimization of the power source working regime, i.e., welding mode. Indeed, the power determines the whole process of WAAM. Therefore, in the present work, an attempt has been made to perform a scientifically based design for the optimal welding mode. The austenitic welding wire was chosen to eliminate phase-transition effects in the solid state of the deposited metal. As a result of the investigation, the advantages of the designed welding mode for WAAM application are made clear. It was shown that the predominant effect on penetration depth possesses pulse current and its input is 49%, while other parameters, i.e., pause current, pulse on time, and frequency, have a less valuable impact. The Taguchi optimization algorithm allowed the development of a specific welding mode for providing better formation of the welds, more grain fined microstructure, and thus improved properties of the modeled wall. Successful efforts have been made to optimize welding modes for WAAM applications. This study is important for manufacturers as well as engineers and scientists.11Nsciescopu

Non-equimolar Cantor high entropy alloy fabrication using metal powder cored wire arc additive manufacturing

In the current contribution, the wire arc additive manufacturing of non-equimolar Co-Cr-Fe-Mn-Ni high-entropy alloy using gas metal arc welding (GMAW) with metal powder-cored wire (MPCW) is proposed. The powder's filler of designed wire feedstock contains Co-Cr-Mn-Ni components in equal atomic amounts relative to each other with Fe metal stripe as a shield. The proposed method provides the possibility to build bulk high-entropy alloy samples with the desired characteristics. The current work approach is superior in a number of indicators to such alternative methods of obtaining bulk HEAs as melting in vacuum, plasma arc melting, selective laser melting, or electron beam melting