Prediction of phase composition and mechanical properties Fe-Cr-C-B-Ti-Cu hardfacing alloys: Modeling and experimental Validations

Vasyl Lozynskyi; Bohdan Trembach; Md Mukter Hossain; Mohammad Humaun Kabir; Yury Silchenko; Michal Krbata; Kostiantyn Sadovyi; Oleksii Kolomiitse; Liubomyr Ropyak

doi:10.1016/j.heliyon.2024.e25199

Prediction of phase composition and mechanical properties Fe-Cr-C-B-Ti-Cu hardfacing alloys: Modeling and experimental Validations

Heliyon. 2024 Feb 5;10(3):e25199. doi: 10.1016/j.heliyon.2024.e25199. eCollection 2024 Feb 15.

Authors

Vasyl Lozynskyi^{1

2}, Bohdan Trembach³, Md Mukter Hossain⁴, Mohammad Humaun Kabir⁵, Yury Silchenko³, Michal Krbata⁶, Kostiantyn Sadovyi⁷, Oleksii Kolomiitse⁸, Liubomyr Ropyak⁹

Affiliations

¹ Belt and Road Initiative Centre for Chinese-European Studies (BRICCES), Guangdong University of Petrochemical Technology, Maoming, 525000, China.
² Department of Mining Engineering and Education, Dnipro University of Technology, 49005, Dnipro, Ukraine.
³ Private Joint Stock Company, Novokramatorsky Mashinostroitelny Zavod, 84305, Ukraine.
⁴ Department of Physics, Chittagong University of Engineering and Technology (CUET), 4349, Chittagong, Bangladesh.
⁵ Department of Materials Science and Engineering, Chittagong University of Engineering and Technology (CUET), 4349, Chittagong, Bangladesh.
⁶ Alexander Dubcek University of Trenčín, 911 06, Trenčín, Slovakia.
⁷ Armament Department of the Radio-Technical Troops, Ivan Kozhedub Kharkiv National Air Force University, 61023, Kharkiv, Ukraine.
⁸ Department of Computing Engineering and Programming, National Technical University Kharkiv Polytechnic Institute, 61000, Kharkiv, Ukraine.
⁹ Department of Computerized Mechanical Engineering, Ivano-Frankivsk National Technical University of Oil and Gas, 15 Karpatska Str., 76019, Ivano-Frankivsk, Ukraine.

Abstract

Alloys of the Fe-Cr-C-B-Ti alloy system are characterized by brittleness, which can be eliminated by the copper alloy, while corrosion resistance and abrasive wear resistance are significantly reduced. In this article, comprehensive investigations are carried out on the microstructure and mechanical properties of the proposed high-copper boron-containing alloy 110Cr4Cu7Ti1VB. Systematic theoretical and experimental studies encompassed thermodynamic calculations in ThermoCALC, production of flux-cored wires for hardfacing and welding, receipt of SEM images, acquisition of load and unload diagrams (discharge) via instrumental indentation on various phases of the deposited metal, and determination of chemical composition at indentation points through local chemical analysis. Mechanical properties of some phases such as γ-Fe phase (austenite), hemioboride Fe₂(В,С) and boron cementite Fe₃(В,С) and titanium carbide TiC in Fe-Cr-C-B-Ti-Сг alloy were determined by using density functional theory (DFT) implemented in the CASTEP code. We also compared these compounds; properties with other available commercial compounds, where available. With the knowledge of calculated elastic constants, the moduli, the Pugh's modulus ratio G/B, the Poisson's ratio v and the hardness of the title phases, 110Cr4Cu7Ti1VB were further predicted and discussed.

Keywords: CASTEP; Coating; DFT; Deposited metal; Fe–C–B–Cr–Ti alloy; Hardfacing; Mechanical properties; Phase diagram.