Article
Engineering, Manufacturing
Bryan Lim, Hansheng Chen, Zibin Chen, Nima Haghdadi, Xiaozhou Liao, Sophie Primig, Sudarsanam Suresh Babu, Andrew J. Breen, Simon P. Ringer
Summary: Electron beam powder bed fusion (E-PBF) can produce nickel-based superalloy components with minimal cracking and post-processing. However, variations in thermal signatures along the build direction inherent in alloys printed using E-PBF can drive significant changes in the microstructure and associated mechanical properties of the components, as evidenced by an increase in mean elastic modulus and hardness as a function of build height.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Haochen Qiu, Xuehui Yan, Shuaishuai Wu, Wei Jiang, Baohong Zhu, Shengli Guo
Summary: Zr-Ti-Nb-Ta alloys were successfully synthesized via multi-target co-sputtering deposition with physical masking, and comprehensive characterization was performed on their phase structure, microstructure, hardness, and modulus. The alloys exhibited good hardness and relatively low modulus, making them promising for biomedical materials.
Article
Chemistry, Physical
Shenshen Cui, Shuo Liu, Jingjun Nie, Dafu Chen, Xinbao Wu, Gaowu Qin, Erlin Zhang
Summary: Titanium and titanium alloys have been widely used in the biomedical field due to their excellent physical, chemical, and biological properties. In this study, Ti-15Mo-xAg alloys with low elastic modulus and excellent antibacterial ability were designed and prepared. The microstructure, mechanical properties, antibacterial properties, and cytocompatibility were investigated. The results showed that Ti-15Mo-10Ag alloy exhibited a strong antibacterial rate of 99.5%, good cellular compatibility, and a low elastic modulus of 85 GPa, suggesting that this alloy may be a highly competitive medical material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Luis Umbelino dos Santos, Kaio Niitsu Campo, Rubens Caram, Eder Socrates Najar Lopes
Summary: In this study, the influence of oxygen content on the microstructure and mechanical properties of Ti-Nb alloys was evaluated. The results showed that increasing oxygen content slightly affected the thickness of alpha plates and beta-transus, but improved hardness and compressive yield stress. Solid-solution strengthening by Nb and oxygen, along with microstructural refinement by Nb addition, were responsible for these improvements.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Manufacturing
S. P. Leo Kumar
Summary: In this study, the influence of end milling parameters on the surface integrity of Ti-3575 alloy was investigated. The results showed that better surface finish could be achieved with higher cutting speed and lower cutting depth. Surface defects were lower under high cutting speed conditions. High-speed milling reduced the Young's modulus and increased the hardness, enhancing the biocompatible behavior of the Ti-3575 alloy.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Gang Liu, Miao Wang, Jianjun Xu, Min Huang, Chen Wang, Yabo Fu, Changhong Lin, Jianbo Wu, Vladimir A. Levchenko
Summary: This study investigated the structure and mechanical properties of Cr-Ti alloy films on the Cr-rich side. It was found that Ti alloying increased the hardness and reduced the modulus of the films. The wear resistance of the films was improved by Ti alloying. The first-principles method demonstrated that the reduced modulus was determined by the degree of Ti alloying. Comparison with other Cr-based alloy films or metallic glasses was made, suggesting that Ti alloying is a potential way to explore advanced mechanical properties of Cr-based alloy films.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Chemical
Alena S. Gornakova, Anna Korneva, Alexander I. Tyurin, Natalia S. Afonikova, Askar R. Kilmametov, Boris B. Straumal
Summary: The paper investigates the impact of HPT on phase transformations and mechanical properties in Ti alloys with different Mo contents. The results show that HPT can significantly increase the hardness and nanohardness of the samples, and the values of hardness and Young's modulus depend on the applied load.
Article
Materials Science, Multidisciplinary
Elena Ryklina, Semen Murygin, Victor Komarov, Kristina Polyakova, Natalia Resnina, Vladimir Andreev, Zhi Zeng
Summary: This study investigates the regulation of Young's modulus in a Ni alloy through variations in grain/subgrain size and initial structure, as well as subsequent aging. The findings demonstrate the significant influence of grain/subgrain size on the modulus magnitude, and reveal the effects of initial structure and aging on modulus reduction.
Article
Chemistry, Physical
Felipe Arias-Gonzalez, Alejandra Rodriguez-Contreras, Miquel Punset, Jose Maria Manero, Oscar Barro, Monica Fernandez-Arias, Fernando Lusquinos, Javier Gil, Juan Pou
Summary: In this study, a fiber texture was developed in beta type Ti-42Nb alloy ingots using laser-directed energy deposition (LDED) technique, which exhibited a very low elastic modulus and high yield and tensile strengths. The laser-deposited Ti-42Nb alloy also enhanced the osteoinductive effect, making it a potential candidate for advanced biomedical implants.
Article
Engineering, Geological
Jie Lai, Jianchun Guo, Yingxian Ma, Hangyu Zhou, Shibin Wang, Yuxuan Liu
Summary: The study on the impact of acid treatment on tight limestone cores showed that acid mainly reacted on the rock inlet surface, and the size of dissolved pores and corrosion fractures was closely related to the type and concentration of acid, reflecting the changing rules of mechanical properties.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Chemistry, Physical
Mohammed Hussien, Vladimir Vishnyakov
Summary: FeMnNiAl, a complex alloy, was prepared in bulk and thin-film forms. Both forms exhibit single-phase, crystalline state, high hardness, and passivation ability, making it a viable option for protecting metallic constructions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Md. Imran H. Khan, Nishane Patel, Md Mahiuddin, M. A. Karim
Summary: This research aims to investigate the micro-level mechanical properties of plant-based food materials (PBFM) during drying and establish relationships between the elastic modulus, hardness, and stiffness and the moisture content. The study found that the mechanical properties of PBFM remained steady in early stages of drying, but significantly increased in later stages, establishing essential relationships with moisture content during drying.
JOURNAL OF FOOD ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Martin Rejhon, Xinliu Zhou, Francesco Lavini, Alessandra Zanut, Filip Popovich, Lorenzo Schellack, Lukasz Witek, Paulo Coelho, Jan Kunc, Elisa Riedo
Summary: It is discovered that two-layer epitaxial graphene films on SiC can undergo a pressure activated phase transition into a sp(3) diamene structure at room temperature, which can significantly increase the hardness of SiC. The hardness increase can reach up to 100% at low loads and up to 30% at high loads. These improved mechanical properties can be explained by the formation of diamene under the indenter's pressure.
Article
Materials Science, Multidisciplinary
Sinara Borborema, Vitor de Holanda Ferrer, Adriana da Cunha Rocha, Caio Marcello Felbinger Azevedo Cossu, Aline Raquel Vieira Nunes, Carlos Angelo Nunes, Loic Malet, Luiz Henrique de Almeida
Summary: This study analyzed the influence of phase precipitations on the microstructure and mechanical properties of heat-treated Ti-12Mo-xNb alloys. The results showed that the addition of Nb suppressed the formation of the alpha '' phase, but a small amount of omega phase was still observed. The addition of Nb increased the Young's modulus, while the decrease in the omega phase reduced the hardness of the alloy.
Article
Materials Science, Multidisciplinary
Michael Schwaighofer, Luis Zelaya-Lainez, Markus Koenigsberger, Markus Lukacevic, Sebastian Serna-Loaiza, Michael Harasek, Olaf Lahayne, Valentin Senk, Josef Fuessl
Summary: Lignin, a by-product of the pulp and papermaking industry, has potential for development as renewable materials. However, its mechanical properties and dependence on extraction process and feedstock are unknown. This study tested five different lignins extracted using different processes and feedstocks. Evaluation and microstructure analysis showed reliable indentation properties of the porous lignins, and micromechanics homogenization theory revealed the similar mechanical properties of solid lignin in all samples, regardless of chemical structure, with a Young's modulus of 7.1 GPa.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Ceramics
Alberto Z. Fatichi, Mariana G. de Mello, Karina D. Pereira, Luisa G. M. Antonio, Augusto D. Luchessi, Rubens Caram, Alessandra Cremasco
Summary: The electrochemical, structural, and biological properties of self-organized amorphous and anatase/rutile titanium dioxide (TiO2) nanotubes deposited on Ti-35Nb-4Zr alloy through anodization-induced surface modification were investigated. The study found that anatase TiO2 exhibited higher surface corrosion resistance and cell viability compared to amorphous TiO2, indicating the importance of TiO2 nanotube crystallization in the material's electrochemical behavior and biocompatibility.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
R. Silva, G. S. Vacchi, C. L. Kugelmeier, I. G. R. Santos, A. A. Mendes Filho, D. C. C. Magalhaes, C. R. M. Afonso, V. L. Sordi, C. A. D. Rovere
Summary: The study investigated the relationship between spinodal decomposition and the formation of Ni-rich clusters and G-phase in ferrite on the hardening and pitting corrosion of two thermally aged DSSs at 475 degrees C. It was found that for 2205 DSS, pitting corrosion behavior is influenced by G-phase precipitates, while for 2101 DSS, pitting corrosion resistance is mainly affected by the formation of Cr-richer nitrides.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Electrochemistry
Juliana Rios, Victor N. Santini, Karina D. Pereira, Augusto D. Luchessi, Eder S. N. Lopes, Rubens Caram, Alessandra Cremasco
Summary: Titanium-based biomaterials with a nanostructured surface have enhanced cellular response and bactericidal behavior. This study found that the addition of Fe affects the formation and crystallization of TiO2 nanotubes on titanium substrates. Crystalline nanotubes improved in vitro cellular response.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Ariel Moreno-Gobbi, Paulo Sergio Silva Jr, Diego Rafael Nespeque Correa, Alfredo Maso Mila, Javier Andres Munoz Chaves, Carlos Roberto Grandini, Rafael Formenton Macedo dos Santos, Conrado Ramos Moreira Afonso
Summary: This study investigates phase transformations and thermal events of a commercially available Ni-rich polycrystalline Ni-Ti alloy using ultrasonic measurements, X-ray diffraction, scanning electron microscopy, and differential scanning calorimetry. The results reveal multiple transformations and relaxation phenomena at low temperatures, indicating complex physical mechanisms.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Daniel da Silva Costa, Guinther Kellermann, Aldo F. Craievich, Luciano A. Montoro, Camilla K. B. Q. M. Oliveira, Conrado R. M. Afonso, Cristian Huck-Iriart, Lisando J. Giovanetti, Felix G. Requejo, Igor G. Zanella, Irineu Mazzaro, Erico S. Szameitat, Rodrigo P. Cardoso
Summary: This article presents a characterization of a 2D nanocomposite, consisting of NiSi2 nanoplates, grown inside a single-crystalline Si wafer. The formation of well-oriented hexagonal nanoplates buried in the Si wafer and randomly oriented Ni nanocrystals in a doped SiO2 thin film is observed using high-resolution scanning transmission electron microscopy. The average thickness and maximum diameter of the NiSi2 nanoplates are determined to be 12 nm and 118 nm, respectively, while the average radius of Ni nanocrystals is 1.7 nm. The described fabrication process opens up possibilities for utilizing the structural features of these materials in devices requiring anisotropic electrical transport properties.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Eber de Santi Gouvea, Mariana Correa Rossi, Angel Vicente Escuder, Conrado Ramos Moreira Afonso, Vicente Amigo Borras
Summary: The influence of open vessels and milling time on the microstructure homogeneity and oxygen content in the beta Ti-Nb-Mo system microstructure was investigated. The study found that the beta phase increased with longer milling times, and strain hardening on particles was observed after 40 hours in the continuous mode. Oxygen content dropped slightly until 40 hours and increased after 60 hours, which was linked to the observed hardening. The research also showed that suitable mechanical properties were achieved after 40 hours in the continuous mode, as hardness and bending strength were closer to bone tissue.
Article
Materials Science, Ceramics
Virgilio P. Ricci, Conrado R. M. Afonso, Rafael F. M. dos Santos, Alberto M. Jorge Junior, Virginie Roche
Summary: This study evaluated the surface optimization of beta-Ti-40Nb alloy in terms of corrosion and bioactivity properties. The results showed that after anodization and annealing, the surface morphology and crystalline phases of the alloy remained stable, and pre-calcification treatment improved its bioactivity.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
R. F. M. Santos, V. P. Ricci, C. R. M. Afonso
Summary: This study aims to obtain continuous cooling transformation (CCT) diagrams for metastable beta Ti-12Mo-6Zr-2Fe (TMZF) and stable beta Ti-40Nb alloys and analyze their microstructure, elastic modulus, and Vickers microhardness under varied cooling rates. The results show that with an increase in cooling rate, both alloys exhibit lower Vickers microhardness and elastic modulus values.
THERMOCHIMICA ACTA
(2022)
Article
Materials Science, Multidisciplinary
Rafael Formenton dos Santos, Mariana Correa Rossi, Andre Luiz Vidilli, Vicente Amigo Borras, Conrado Ramos Moreira Afonso
Summary: The novelty of this work lies in the correlation between Moeq and mechanical and surface parameters. Ti-15Nb (TN-15), Ti-40Nb (TN-40), Ti-33Nb-33Zr (TNZ-33), Ti-40Nb-40Zr (TNZ40), and Ti-35Nb-7Zr-5Ta (TNZT) alloys were obtained by casting. The addition of Nb and Zr influenced the lattice parameters and crystal structure of the alloys. Grain size decreased with the addition of Nb and Zr, and roughness decreased as well. The contact angle and free energy surface values were inversely proportional, and the mechanical properties showed a similar trend to the Moeq values and cell parameter of phase b.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Chaiane M. Caneda, Piter Gargarella, Rudimar Riva, Claudio S. Kiminami, Conrado R. M. Afonso
Summary: Fe76.5Nb8.5B15 (at.%) ultrafine eutectic (UE) coatings were processed by laser cladding, resulting in the formation of nanoscale borides that improved mechanical properties. The wear performance of the coatings and substrate was evaluated, showing different wear mechanisms such as abrasive, adhesive, shearing, and delamination. Oxide particles responsible for tribofilm formation and debris nanoparticles from fracture or breakage were observed. Overall, the Fe-Nb-B ultrafine eutectics laser clad coatings exhibited comparable or superior wear resistance properties to commercial alloys and other materials processed by rapid solidification.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Marcio Sangali, Alessandra Cremasco, Juliano Soyama, Rubens Caram, Rodrigo J. Contieri
Summary: With the continual advancement of Additive Manufacturing technology, the optimization of microstructure and properties has been made possible. However, the correlation between microstructure and corrosion properties remains unclear, calling for more systematic investigations.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Vinicius C. Ottani, Mariana S. Pereira, Matheus S. T. Arruda, Mariana C. Rossi, Conrado R. M. Afonso
Summary: Ni-based superalloys are widely used in aircraft engines, turbines, and petrochemical industry due to their superior mechanical, corrosion, and oxidation resistance at high temperatures. The chemical composition and heat treatments influence the phases formed and the mechanical strength of these alloys. There is a lack of research on ternary superalloys based on Ni-Nb and the effect of the third alloying element on the microstructure and microhardness. This study aims to characterize pseudo-eutectic alloys of the Ni-15Nb-xM and Ni-20Nb-xM systems and investigate the influence of alloy elements and heat treatments on their microstructure and properties.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Pedro Akira Bazaglia Kuroda, Carlos Roberto Grandini, Conrado Ramos Moreira Afonso
Summary: This study aims to investigate the structure of Ti-25Ta-xZr system alloys (x = 0, 10, 20, 30, and 40% wt.) through melting and hot-rolling processes using Rietveld's technique. The findings demonstrate that the addition of zirconium as a β phase stabilizer increases the lattice parameters of the phases and reduces the elastic modulus values and atomic packing factor (APF) of the alloys. Hot-rolling induces α phase formation and increases the APF of the alloys. The average crystalline size and micro-strain of the structures were determined using the William-Hall technique.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mariana P. Medeiros, Amanda P. Carvalho, Augusta Isaac, Conrado R. M. Afonso, Milos Janecek, Peter Minarik, Mayerling Martinez Celis, Roberto B. Figueiredo
Summary: The effect of high pressure torsion processing on the mechanical properties and corrosion behavior of various magnesium alloys was studied. Severe plastic deformation processing improved the strength of all alloys, but deformation localization occurred in the Mg-Zn-Ca and Mg-Y-RE alloys. Pure magnesium, Mg-Zn, and Mg-Li-Y alloys exhibited good corrosion resistance with low corrosion rates and maintained integrity after 28 days of immersion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Rafael Formenton Macedo dos Santos, Carolina Neves Reis, Conrado Ramos Moreira Afonso
Summary: There has been a growing interest in the search for metallic alloys with favorable mechanical and chemical characteristics that elicit a positive biological response in recent years. Among these alloys, ss-Ti alloys have attracted significant attention due to their low elastic modulus and excellent biocompatibility. This study aimed to characterize ss-Ti alloys within the Ti-Nb-Zr system and investigate the influence of the proportion of ss-stabilizing or betagenic elements on the microstructure and properties of the alloys.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Materials Science, Biomaterials
Mohammadreza Kasravi, Alireza Yaghoobi, Tahereh Tayebi, Mahsa Hojabri, Abdolkarim Talebi Taheri, Fatemeh Shirzad, Bahram Jambar Nooshin, Radman Mazloomnejad, Armin Ahmadi, Fatemeh A. Tehrani, Ghasem Yazdanpanah, Mohammad Hadi Farjoo, Hassan Niknejad
Summary: As a promising approach in translational medicine, the decellularization of discarded livers to produce bioscaffolds that support recellularization has potential in overcoming the limitations of conventional liver transplantation. In this study, the researchers investigated the use of matrix metalloproteinase (MMP) inhibition to preserve the extracellular matrix (ECM) during liver decellularization. The results demonstrated that the application of an MMP inhibitor significantly improved the preservation of ECM components and mechanical properties of the bioscaffolds, which supported cell viability and function in vitro. The study also confirmed that the MMP inhibition led to the inhibition of MMP2 and MMP9, providing a novel method to enhance ECM preservation during liver decellularization.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Mohammadsadegh Nadimifar, Weiguang Jin, Clara Coll-Satue, Gizem Bor, Paul Joseph Kempen, Ali Akbar Moosavi-Movahedi, Leticia Hosta-Rigau
Summary: This study presents a metal-phenolic self-assembly approach that can prepare nanoparticles fully made of hemoglobin. The nanoparticles exhibit good oxygen binding and releasing capabilities.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jyoti Kumari, Roel Hammink, Jochem Baaij, Frank A. D. T. G. Wagener, Paul H. J. Kouwer
Summary: Fibrosis is the formation of fibrous connective tissue in response to injury, leading to organ dysfunction. A novel hybrid hydrogel combining synthetic polyisocyanide with hyaluronic acid has been developed, showing strong antifibrotic properties.
BIOMATERIALS ADVANCES
(2024)
Letter
Materials Science, Biomaterials
Melissa Machado Rodrigues, Cristian Padilha Fontoura, Charlene Silvestrin Celi Garcia, Sandro Tomaz Martins, Joao Antonio Pegas Henriques, Carlos Alejandro Figueroa, Mariana Roesch Ely, Cesar Aguzzoli
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jessica Polak, David Sachs, Nino Scherrer, Adrian Suess, Huan Liu, Mitchell Levesque, Sabine Werner, Edoardo Mazza, Gaetana Restivo, Mirko Meboldt, Costanza Giampietro
Summary: Human skin equivalents (HSEs) play a crucial role in tissue engineering. This study introduces a 3D-printed culture insert to apply a static radial constraint on HSEs and examines its effects on tissue characteristics. The results show that the diameter of the culture insert significantly influences tissue contraction, fibroblast and matrix organization, keratinocyte differentiation, epidermal stratification, and basement membrane formation. This study provides important insights for the design of skin tissue engineering.
BIOMATERIALS ADVANCES
(2024)
Review
Materials Science, Biomaterials
Shiliang Chen, Tianming Du, Hanbing Zhang, Jing Qi, Yanping Zhang, Yongliang Mu, Aike Qiao
Summary: This paper reviewed the primary methods for improving the overall properties of biodegradable zinc stents. It discussed the mechanical properties, degradation behavior, and biocompatibility of various improvement strategies. Alloying was found to be the most common, simple, and effective method for improving mechanical properties. Deformation processing and surface modification further improved the mechanical properties and biological activity of zinc alloys. Meanwhile, structural design could endow stents with special properties. Manufacturing zinc alloys with excellent properties and exploring their interaction mechanism with the human body are areas for future research.
BIOMATERIALS ADVANCES
(2024)
