Article
Materials Science, Multidisciplinary
Janette Brezinova, Jan Vinas, Anna Guzanova, Jozef Zivcak, Jakub Brezina, Henrich Sailer, Marek Vojtko, Miroslav Dzupon, Andreas Volkov, Ladislav Kolarik, Pavel Rohan, Viktor Puchy
Summary: This study presents research results on the quality of hardfacing layers made during the renovation of unheated mold surfaces designed for injection of aluminum alloys using the plasma transferred arc (PTA) technology. The study evaluated the quality of layers through nondestructive and destructive tests, and recommended the nickel alloy-based additive DEW Nibasit 625-P for renovation based on tribology properties evaluation.
Article
Chemistry, Physical
Sunil Kumar Tiwari, Akula Umamaheswara Rao, Vipin Chawla, Paritosh Dubey, Vikas Saxena, Amit K. Chawla, Devesh Kumar Avasthi
Summary: Ni3Al and Nickel-rich Ni3Al thin films were deposited on Si substrates using magnetron sputtering and co-sputtering processes. The effects of Ni enrichment on the elemental composition, microstructure, surface topography, and mechanical properties were investigated. The results showed that the hardness and young's modulus decreased with increasing Ni content, while the surface roughness affected the hydrophobic properties. The study demonstrated that surface roughness, microstructure, and elemental composition influenced the mechanical and hydrophobic properties of the Ni3Al coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Coatings & Films
M. R. Ardigo-Besnard, A. Tellier, A. Besnard, J-P Chateau-Cornu
Summary: This study compared the tribological properties of Norem02 alloy prepared by HIP and PTAW, finding that the HIPed alloy exhibited higher wear resistance. The fine microstructure obtained by HIP allows the alloy to better withstand mechanical stresses and reduce surface damages during wear tests.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Zofia Kula, Michael Semenov, Leszek Klimek
Summary: The study shows that carbon coatings applied on prosthodontic alloy Ni-Cr exhibit good mechanical properties and corrosion resistance, effectively reducing bacterial adhesion on surfaces.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Multidisciplinary
Sheng Hong, Xinlu Shi, Jinran Lin, Yuping Wu, Jiahui Li, Yuan Zheng
Summary: This study investigates the effects of flow velocities (FVs) and sand concentrations (SCs) on the cavitation-silt erosion (CSE) behaviors of two hardfacing coatings. The WC-20(Cr3C2)-7Ni coating exhibits superior CSE resistance compared to the Cr3C2-25(NiCr) coating. Increasing FV and SC has a negative impact on the CSE resistance of both coatings.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Engin Kocaman, Bulent Kilinc, Saduman Sen, Ugur Sen
Summary: The aim of this study was to form in-situ Fe2Ti and TiB2 phases on the steel surface using ferroalloy starting materials and investigate their effects on the surface properties. The microstructural, hardness, wear and corrosion behavior of the coating were examined, and it was found that these phases had significant effects on the hardness, wear resistance, and corrosion resistance of the coating.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Saira Bibi, Jing-Min Wang, Tariq Mehmood, Waheed Qamar Khan, Cheng-Bao Jiang
Summary: This study investigated the hot corrosion behavior of Sm-2(Co, Fe, Cu, Zr)(17)-type high-temperature magnetic alloy at 500°C in a corrosive mixture of 75 wt% Na2SO4-NaCl. The results showed that the bilayer-coated samples (Ni/Cr) performed better in protecting the alloy from oxidation and sulfur penetration, compared to the Ni-coated and bare samples. The presence of Ni/Cr bilayer coating resulted in improved magnetic properties of the alloy.
Article
Materials Science, Coatings & Films
Viviane Teleginski Mazur, Mauricio Marlon Mazur, Ana Sofia C. M. D'Oliveira
Summary: This study investigated the effects of customizing a commercial Inconel 625 atomized alloy with increasing additions of Ni and Al elemental powder mixtures to obtain multilayered coatings with a composition and property gradient. The gradual additions of Ni + Al powder mixture allowed for the in-situ synthesis of aluminides while maintaining good weldability, resulting in improved mechanical properties and oxidation resistance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Shuai Yang, Zhaoyang Zhang, Kun Xu, Yucheng Wu, Hao Zhu, Wenrong Shen, Yang Liu
Summary: Ni-Co-W alloy is a promising material with excellent performance and wide application prospects. Electrochemical deposition and laser electrochemical deposition were utilized to fabricate Ni-Co-W alloy coatings. The variations in W content significantly influenced the coating's surface morphology, internal structure, and mechanical properties. The study also revealed that laser irradiation combined with a suitable W content can greatly enhance the corrosion resistance of the coatings.
Article
Chemistry, Physical
Piotr Ledwig, Malgorzata Kac, Agnieszka Kopia, Jan Falkus, Beata Dubiel
Summary: Ni-Co-Fe nanocrystalline coatings were electrodeposited from citrate-sulfate baths with different ion concentration ratios. The coatings showed high hardness and superior magnetic properties, making them promising for future applications in micromechanical devices.
Article
Materials Science, Multidisciplinary
Nilay Comez
Summary: The objective of this study was to investigate the effect of vanadium on wear and corrosion resistance in Fe-Cr-C hardfacing alloy. The addition of vanadium resulted in the formation of carbides and reduction in size and volume fraction of primary carbides. However, the vanadium-free coating exhibited maximum hardness and wear resistance while having the highest corrosion rate. The optimal vanadium content was found to be 2% by weight.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Review
Materials Science, Multidisciplinary
S. Balaguru, M. Gupta
Summary: Hardfacing is commonly used to increase the service life of structural components, with Ni-base, Co-base, and Fe-base alloys being widely utilized. Ni-base alloys are preferred for their ability to retain hardness at elevated temperatures. Various research works on Ni alloy hardfacings using different processes on different substrates can benefit researchers and industries in the field of hardfacing.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Multidisciplinary Sciences
Begum Unveroglu
Summary: Electrochemical deposition of Ni metal matrix composite coatings is commonly used to enhance the corrosion resistance and hardness of materials. In this study, Ni-Cu and Ni-Cu/CeO2 metal matrix coatings were fabricated on SS 304 substrates via electrodeposition. The addition of CeO2 particles into the electrolyte resulted in a more negative shift of the hydrogen evolution reaction and a slightly accelerated deposition of Ni ions. Compositional analyses revealed a higher Ni fraction in the deposit with CeO2-containing electrolyte. XRD measurements confirmed the presence of Ni-Cu solid solutions in all coatings and the presence of CeO2 in the ceramic reinforced layer. The morphology of the coatings changed from cauliflower-like to a denser layer with the addition of CeO2. The hardness of the samples increased and the corrosion current density decreased with the addition of CeO2, indicating an improved performance for the Ni-Cu/CeO2 metal matrix composite coating. The findings were also supported by Nyquist and Bode plots in the potentiodynamic polarization tests.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xin-Yuan Dong, Xiao-Tao Luo, Yi Ge, Chang-Jiu Li
Summary: This paper presents a method to deposit highly dense Ni-based alloy coatings without oxides by introducing boron as a deoxidizer element through plasma spraying. The oxide-free Ni20Cr4B coating shows low oxygen content, high density microstructure, and effectively blocks the penetration of corrosion media, demonstrating excellent hot-corrosion resistance.
MATERIALS & DESIGN
(2021)
Article
Engineering, Mechanical
Rismaya Kumar Mishra, Hemant Kumar, G. A. Harmain, S. K. Albert
Summary: Nickel-based thick hardface coatings are widely used in nuclear power plants due to their superior wear and high-temperature resistance properties. This study aimed to investigate the wear behavior of Ni-Cr-B-Si hardface coating deposited on 316LN stainless steel using the Cold Metal Transfer (CMT) welding process, revealing optimal hardness and wear resistance. The experiment found that CMT can be utilized to deposit crack-free, low dilution, and wear-resistant hardface coatings in nuclear industries.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Beatriz A. Pinto, Ana Sofia C. M. d'Oliveira
Summary: Niobium silicide coatings were successfully processed on Nb metal using double pack cementation procedures at temperatures ranging from 1000 degrees C to 1200 degrees C for up to 6 hours. The thickness and hardness of the coatings were influenced by processing parameters, with lower temperatures resulting in single-layer coatings and the highest temperature yielding two-layer coatings. Pre-oxidation treatment was found to be essential for enhancing oxidation resistance and forming an SiO2 scale on the surface.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Automation & Control Systems
Heber O. Abreu-Castillo, Bruno P. Bueno, Ana Sofia C. M. d'Oliveira
Summary: Alloying elements, particularly tungsten carbides, have been added to beta-NiAl to enhance its strength and creep resistance at high temperature. The study found that microparticles of carbides increased hardness by affecting substrate dilution and density of point defects, while the addition of WC nanoparticles had a negative impact on NiAl synthesis and resulted in low hardness coatings.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Mariane de Toledo Lima Thome, Ana Sofia C. M. d'Oliveira
Summary: Enhanced understanding of NbSi2 alloys is crucial for better control of their properties and performance. This study investigated the relationship between processing conditions and properties of NbSi2 processed by solid-state diffusion. The results showed the formation of hypo-stoichiometric NbSi2 compounds and an increase in lattice distortion with reduced Si availability during processing.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Eloisa Pereira Cardozo, Ana Sofia C. M. D'Oliveira
Summary: The need for high thermal and propulsive efficiency in equipment operating at high temperatures, as well as stricter environmental regulations, drives the search for materials that can withstand harsh operating conditions. This study evaluates the fabricability of niobium silicides multilayers through in situ synthesis during the deposition of powder mixtures by plasma transferred arc, as well as the impact of oxygen content during processing. The results show that the Plasma Transferred Arc successfully processed the Nb silicide multilayer, and the microstructure and oxidation behavior of the multilayer were affected by the availability of oxygen.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Engineering, Manufacturing
Luiz Eduardo dos Santos Paes, Milton Pereira, Fabio Antonio Xavier, Walter Lindolfo Weingaertner, Ana Sofia Climaco Monteiro D'Oliveira, Erick Cardoso Costa, Louriel Oliveira Vilarinho, Americo Scotti
Summary: The study assessed the performance of laser remelting as an alternative to conventional post-processing techniques after pDED-L, showing significant reductions in material surface roughness and waviness. The performance varied according to material type, mainly related to thermal diffusivity and electrical resistivity differences.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Alana S. Dalpasquale, Ana Sofia C. M. D'Oliveira
Summary: Diffusion coatings are used to protect components against oxidation and corrosion in high temperature applications, with processing routes and parameters determining the characteristics of the coatings. Understanding the phenomena involved is crucial as the substrate plays a significant role, demonstrated through a systematic assessment of chromium and aluminum diffusion coatings processed on a nickel alloy. Nonuniform structure of the as-cast alloy allows preferential diffusion paths to form, impacting coating thickness and differences caused by processing routes.
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2021)
Article
Materials Science, Coatings & Films
Viviane Teleginski Mazur, Mauricio Marlon Mazur, Ana Sofia C. M. D'Oliveira
Summary: This study investigated the effects of customizing a commercial Inconel 625 atomized alloy with increasing additions of Ni and Al elemental powder mixtures to obtain multilayered coatings with a composition and property gradient. The gradual additions of Ni + Al powder mixture allowed for the in-situ synthesis of aluminides while maintaining good weldability, resulting in improved mechanical properties and oxidation resistance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
E. Pauletti, A. S. C. M. d' Oliveira
Summary: Aluminized coatings play a crucial role in enhancing process efficiency at higher operating temperatures for Ni based alloys. This study compares Pd-modified and unmodified aluminized coatings with Pt-modified coatings to understand their formation mechanisms and oxidation performance. Results reveal that Pd reduces the diffusion of Al during coating formation, enhances outward diffusion of Ni, and decreases alloying element (Cr and Ti) diffusion into the intermetallic layer. On the other hand, Pt increases Al diffusion and mobility in the intermetallic layer. These characteristics directly affect oxidation at 1000 degrees C, with Pd reducing the transformation rate of theta-Al2O3 -> alpha-Al2O3, resulting in a higher void density at the beta-(NiAl)/theta-Al2O3 interface, oxygen diffusion into the coating, spalling, and faster degradation of coatings.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Gustavo Scheid Prass, Ana Sofia C. M. d'Oliveira
Summary: This study evaluated the effects of adding Cu particles and CuO nanoparticles on AISI 316L. It found that the addition of Cu changed the processability of 316L and the presence of nanoparticles increased the risk of porosity and lack of fusion in the coatings.
SURFACE & COATINGS TECHNOLOGY
(2023)
Review
Automation & Control Systems
Jeferson T. T. Pacheco, Ana Sofia C. M. de Oliveira
Summary: One of the main advantages of additive manufacturing is the ability to build components of different sizes and geometries through the layer-by-layer deposition process. However, for alloys like duplex stainless steels, the control of microstructure is challenging due to the heat cycles and heat input from successive layers. This manuscript reviews the main features of duplex stainless steels processed by additive manufacturing processes, with a focus on directed energy deposition. The impact of thermal cycles and post processing heat treatment on the microstructure is discussed, along with results obtained from different additive processes.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Eloisa P. Cardozo, Vitor R. de Cisne, Ana Sofia C. M. D'Oliveira
Summary: Nb-based alloys are considered as the most suitable replacement for Ni alloys in new generation aircrafts due to their ability to meet extreme environmental requirements. The in-situ synthesis of high hardness low toughness silicide compounds in Nb alloys during the deposition process allows for the production of multilayer coatings with enhanced properties. This investigation provides important insights into the processing of Nb alloys as coatings and highlights the role of Si in the formation and distribution of silicides.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Juliane Ribeiro da Cruz, Andressa Colombes, Ana Sofia C. M. d'Oliveira
Summary: The joining of stainless steel and copper is challenging due to their differences in melting temperatures and thermal conductivities. This study investigated the joining of 316L stainless steel and copper using high velocity oxyfuel. It was found that 316L coatings have better adhesion to copper substrates compared to copper coatings on AISI 316 substrates. The ease of 316L incoming particles to embed in the softer copper matrix and the higher susceptibility of 316L coatings to diffuse into copper substrates contribute to the superior adhesion.
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Viviane Teleginski Mazur, Leticia Batista Guimaraes, Ana Sofia Climaco Monteiro D'Oliveira
Summary: The customization of metallic alloys allows for the addition of functionalities to materials, and in situ synthesis of intermetallic compounds offers a balanced solution to processing challenges. This investigation focused on processing coatings of Inconel 625 superalloy with in situ formed Ni-Al based intermetallics to increase hardness and high temperature oxidation resistance while maintaining weldability.
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Fernanda Tassi, Rodrigo Perito Cardoso, Ana Sofia C. M. d'Oliveira
Summary: Surface engineering is crucial for manufacturing high-performance components, especially when specific properties are required. The composition of the substrate and treatment sequence have a significant impact on the treated surface features. The results showed that the hardness and corrosion resistance of the surfaces are influenced by the steel composition and treatment sequence.
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Danielle Bond, Rosineide Junkes Lussoli, Joao Batista Rodrigues Neto, Ana Sofia Climaco Monteiro D'Oliveira
SOLDAGEM & INSPECAO
(2020)
