Article
Materials Science, Multidisciplinary
Yu-Jui Lin, Chao-Sung Lin
Summary: The corrosion behavior and corrosion rate of friction stir welded AZ31B magnesium alloy and 6N01 aluminum alloy dissimilar joints were studied using real-time imaging, potentiodynamic polarization, EIS, and hydrogen evolution tests. The corrosion rate was found to increase in the order of Al base metal < Mg base metal < stirred zone. The galvanic coupling of the Mg phase to other phases enhanced the corrosion of both base metals, and intense corrosion at BM-AZ31B elevated the interfacial pH due to water reduction on the cathodic particles of BM-6N01.
Article
Materials Science, Multidisciplinary
J. Chavez, O. Jimenez, J. Diaz-Luna, D. Bravo-Barcenas, F. Alvarado-Hernandez, M. Flores, R. Suarez-Martinez
Summary: The study showed that Ti-30Zr-xTa alloys exhibit better corrosion resistance and microhardness compared to Ti-30Zr alloy, especially for the sample with 3 at.% Ta addition.
Article
Metallurgy & Metallurgical Engineering
Zeeshan Ur Rahman, Maqsood Ali, Ye-Tang Pan, David G. Churchill, Bon Heun Koo
Summary: In this study, the addition of (EDTA)4- in alkaline silicates electrolyte was found to result in thick and layered pancake-like materials with minimum cracks and porosity. The analysis also revealed that EDTA can significantly alter the surface layers composition and act as a passivation agent. However, no individual polycrystalline phases were formed. The corrosion potential of the coated AZ91 was positive, but the results were not consistent with the cyclic polarization tests.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
E. Naderi, A. Davoodi, H. R. Jafarian
Summary: The corrosion of WE43 magnesium alloys was studied after the equal-channel angular pressing (ECAP) process with different passes. The results showed that the samples with 2P and 3P exhibited better corrosion resistance. This was attributed to the precipitation of beta particles with a higher volume fraction, which served as cathodic reaction sites.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Zhiyuan Feng, Charles C. Xu, Dadi Zhang, Rudolph Buchheit
Summary: The study showed that the corrosion resistance of AZ31 Mg alloy was significantly improved after coating treatment with 5 mM or 10 mM sodium selenite, with the protection mechanism attributed to the transformation of selenite to insoluble selenium, the formation of insoluble MgSeO3 hydrate, and the polymerization of amorphous selenium.
Article
Materials Science, Multidisciplinary
Saumyadeep Jana, Matt Olszta, Danny Edwards, Mark Engelhard, Avik Samanta, Hongtao Ding, Pratik Murkute, O. Burkan Isgor, Aashish Rohatgi
Summary: Laser surface processing improved the corrosion resistance of AZ31 alloy by forming a mixed metal oxide surface film and refining the size and number density of intermetallic particles.
Article
Materials Science, Biomaterials
A. Bahgat Radwan, Paul C. Okonkwo, Srinivasan Murugan, Gururaj Parande, Maryna Taryba, M. Fatima Montemor, Layla Al-Mansoori, Mohamed A. Elrayess, Noora Al-Qahtani, Manoj Gupta, Khaled M. Youssef, Raymundo Case, R. A. Shakoor, Aboubakr M. Abdullah
Summary: Currently used titanium and stainless steel implants for permanent vascular stents have disadvantages of corrosion and the need for a second surgery. Biodegradable magnesium alloys have been found to be a promising substitute. This study investigates the biodegradation performance of a magnesium alloy reinforced by zinc and eggshell in simulated body fluid.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Lifei Wang, Ye Lu, Hua Chai, Guangsheng Huang, Xinwei Fu, Xiaoqing Cao, Hua Zhang, Hongxia Wang, Maurizio Vedani
Summary: The study found that the critical point where the corrosion rate changes is at 12% strain level, before which the corrosion rate first increases and then decreases. The antagonistic effect of basal structure and dislocation aggregation plays a crucial role in corrosion resistance. With an increase in strain, the number of twins increases, causing a continuous decrease in corrosion resistance.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Electrochemistry
A. Maria Osipenko, S. Dzmitry Kharytonau, Aliaksandr A. Kasach, Jacek Ryl, Janusz Adamiec, I. Irina Kurilo
Summary: This study investigated the corrosion inhibition of the AZ31 magnesium alloy in NaCl solutions containing different concentrations of sodium molybdate inhibitor. Various experimental methods were used to examine the mechanism of molybdate corrosion inhibition. The results showed that Na2MoO4 inhibitor provided reliable inhibition at high concentrations (150 mM). Surface examination confirmed the formation of a protective surface layer of mixed Mo (VI, V, IV) species.
ELECTROCHIMICA ACTA
(2022)
Article
Metallurgy & Metallurgical Engineering
K. S. Duran, N. Hernandez, L. M. Rueda, C. A. Hernandez-Barrios, A. E. Coy, F. Viejo
Summary: This study developed multilayer barrier-bioactive coatings to enhance the corrosion resistance of magnesium alloy and promote the growth of apatite-like phases. However, an increase in salt content led to the formation of porous coatings, affecting the corrosion resistance of magnesium alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
M. Daroonparvar, A. Helmer, A. M. Ralls, A. K. Kasar, M. U. Farooq Khan, P. L. Menezes, M. Misra, S. Shao, R. K. Gupta
Summary: Cold sprayed commercially pure Al-based coatings were applied on Mg-based alloys at different N2 gas temperatures. The porosity percentage of the coatings decreased and the flattening ratio increased as the N2 gas temperature decreased, due to in-situ tamping densification. This resulted in a noticeable reduction in wear rate of the Al-based coatings.
Article
Materials Science, Multidisciplinary
K. S. Duran, C. A. Hernandez-Barrios, A. E. Coy, F. Viejo
Summary: Fluoride-based pretreatment of the WE54 magnesium alloy can improve the corrosion resistance of the sol-gel coatings and alloy, but long pretreatment times may lead to structural defects that accelerate corrosive attack in saline environments.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Coatings & Films
R. Samadianfard, D. Seifzadeh, A. Habibi-Yangjeh
Summary: In this study, SDS-stabilized fullerene C60 nanoparticles were dispersed in a sol-gel coating to enhance the corrosion protection of AM60B magnesium alloy. The incorporation of F-SDS nanoparticles led to a relative increase in surface roughness and improved corrosion resistance of the sol-gel coating, as confirmed by various characterization techniques. The corrosion damages of the sol-gel coating containing F-SDS were significantly reduced according to SEM and EDS-mapping analyses.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Wenlu Yang, Zeqi Liu, Hualiang Huang
Summary: The galvanic corrosion behavior between AZ91D magnesium alloy and copper in distilled water was studied through electrochemical methods and surface characterization. The results revealed that the potential difference between coupled metals is more suitable for calculating the galvanic current density, and the galvanic effect between them enhances the corrosion of AZ91D magnesium alloy while reducing the protection of corrosion product film. The galvanic current density increases with higher temperature and soaking time, possibly due to the destruction of cathodic hydrogen evolution on the corrosion product film.
Article
Materials Science, Multidisciplinary
Jinsun Liao, Yukiyo Miyawaki
Summary: The atmospheric corrosion resistance of a diecast Mg-Al-Ca-Si alloy was found to be better than that of a wrought AM60 alloy through long-term field exposure and electrochemical tests. The continuous intermetallic phases in the diecast alloy inhibit corrosion propagation, resulting in higher corrosion resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Review
Materials Science, Multidisciplinary
Lukas Stemper, Matheus A. Tunes, Ramona Tosone, Peter J. Uggowitzer, Stefan Pogatscher
Summary: Commercial aluminum alloys have been optimized for specific applications for almost a century, but new alloy design strategies are needed to overcome limitations in lightweighting concepts. Crossover alloys combine advantageous properties and may see broader industrial application in the near future.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
D. Schimbaeck, P. Mair, M. Baertl, F. Palm, G. Leichtfried, S. Mayer, P. J. Uggowitzer, S. Pogatscher
Summary: To fully exploit the potential of additive layer manufacturing, adapting materials to the process via smart alloy design is necessary. Different microstructural evolutions were studied in Sc-modified Al alloys with the addition of Mg, Cr, or Ti as main elements. The differences in microstructures arise from interactions of grain growth restriction factors and solute with the primary precipitation structure.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Daniel Landmann, Enea Svaluto-Ferro, Meike V. F. Heinz, Patrik Schmutz, Corsin Battaglia
Summary: Sodium-metal chloride batteries are a sustainable and safe alternative to lithium-ion batteries for large-scale stationary electricity storage, but their rate capability is limited. Metal-ion diffusion in the electrolyte is found to limit the chlorination process of both nickel and iron electrodes, instead of metal-ion migration through the metal chloride conversion layer.
Article
Materials Science, Multidisciplinary
Florian Schmid, Dominik Gehringer, Thomas Kremmer, Luigi Cattini, Peter J. Uggowitzer, David Holec, Stefan Pogatscher
Summary: The formation of Al3Zr particles in dilute aluminum alloys is important for controlling microstructure evolution and enhancing material properties. In this study, nine ternary Al-Zr-X alloys were produced to identify elements that can disrupt the transformation of Al3Zr particles. Experimental and computational analyses were conducted to investigate the behavior and impact of different elements.
Article
Materials Science, Multidisciplinary
R. E. Schaublin, M. Becker, M. Cihova, S. S. A. Gerstl, D. Deiana, C. Hebert, S. Pogatscher, P. J. Uggowitzer, J. F. Loffler
Summary: The impact of Zn and Ca on the microstructure of lean Mg-Zn-Ca alloys was investigated. The precipitation of binary and ternary precipitates was observed at different temperatures. Hardness testing revealed that GP zones were the most effective factor in hardening.
Review
Materials Science, Multidisciplinary
Dierk Raabe, Dirk Ponge, Peter J. Uggowitzer, Moritz Roscher, Mario Paolantonio, Chuanlai Liu, Helmut Antrekowitsch, Ernst Kozeschnik, David Seidmann, Baptiste Gault, Frederic De Geuser, Alexis Deschamps, Christopher Hutchinson, Chunhui Liu, Zhiming Li, Philip Prangnell, Joseph Robson, Pratheek Shanthraj, Samad Vakili, Chad Sinclair, Laure Bourgeois, Stefan Pogatscher
Summary: Aluminum has both positive and negative impacts on sustainability. Recycling aluminum can improve sustainability, while extracting it from ores is energy-intensive. The amount of recyclable aluminum is expected to double by 2050, offering an opportunity for a circular economy. However, the presence of elemental contamination in post-consumer scrap poses challenges for alloy design.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
William A. Lackington, Peter Schweizer, Mariya Khokhlova, Claudia Cancellieri, Stefanie Guimond, Anne-Lise Chopard-Lallier, Joelle Hofstetter, Patrik Schmutz, Xavier Maeder, Markus Rottmar
Summary: In modern oral maxillofacial surgery, long-term stability of implants is closely related to the quality of osseointegration. This study investigates the influence of femtosecond laser-texturing on physicochemical properties, blood-implant interactions, and osseointegration potential of titanium-aluminium-vanadium (TiAlV) implant surfaces. Laser-texturing enables the production of designer surfaces with defined micro-scale features, showing comparable biological performance to state-of-the-art implants.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Multidisciplinary Sciences
Nikolaus Papenberg, Thomas Hatzenbichler, Florian Grabner, Peter J. Uggowitzer, Stefan Pogatscher
Summary: Weight reduction is significant in transportation industries as it affects fuel consumption and vehicle range. Different materials are commonly used to take advantage of specific properties, with aluminum alloys used in both cast and wrought states. However, magnesium alloys, which are lighter, are only used in castings. Despite progress in scientific research on magnesium wrought alloys, their industrial implementation is limited, resulting in a lack of safety and structural applications. To promote industrial application and acceptance of these materials, the forging process of an automotive control arm was investigated. By using an age-hardenable Mg-Al-Ca-Zn-Mn lean alloy, which can be processed similarly to AL alloys, the study provides information on forming characteristics and challenges.
SN APPLIED SCIENCES
(2023)
Article
Engineering, Environmental
Roberto Cestaro, Laetitia Philippe, Albert Serra, Elvira Gomez, Patrik Schmutz
Summary: In this study, electrodeposited manganese oxides (MnyOx) films were used as a visible-light-driven photocatalyst for the removal and mineralization of Tetracycline (TC) antibiotics. The best performing manganese oxide showed 92.4% TC mineralization efficiency after 180 min of LED visible illumination. Hydroxyl radicals (center dot OH) were found to be the main active species responsible for the TC degradation. The degradation of the oxide surface structure was identified as the key factor limiting the photocatalytic activity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Milad Roostaei, Peter J. Uggowitzer, Reinhard Pippan, Oliver Renk
Summary: The attractive properties of Mg-bcc nanocomposites have gained increasing interest, but bulk fabrication has been unsuccessful due to strain localization within the Mg-phase. Through high-pressure torsion, the deformation behavior and resulting microstructures of Mg-Fe composites were analyzed at different applied strains and processing temperatures. Surprisingly, processing at 73% of Mg's melting point accelerated microstructural refinement and improved homogeneity, leading to a three-fold increase in hardness compared to ambient processing. This suggests that further optimization could potentially create Mg-based materials with strength beyond a gigapascal.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Sebastian Samberger, Irmgard Weissensteiner, Lukas Stemper, Christina Kainz, Peter J. Uggowitzer, Stefan Pogatscher
Summary: This study presents age-hardenable, fine-grained AlMgZnCu crossover alloys intended for superplastic and quick plastic forming processes. These alloys utilize T-phase (Mg32(Al,Zn)49) to refine the grain structure and increase age-hardening. The study demonstrates the importance of particle stimulated nucleation (PSN) using T-phase particles, which leads to a fine grain size as low as 4 μm. The resulting alloys have excellent high-temperature forming properties and high stability.
Article
Materials Science, Multidisciplinary
Bernhard Trink, Irmgard Weissensteiner, Peter J. Uggowitzer, Katharina Strobel, Anna Hofer-Roblyek, Stefan Pogatscher
Summary: This study introduces new alloys that combine the age-hardening capability of Al-Mg-Si alloys with the microstructure-controlling effect on processing of primary Fe-rich intermetallic phases used in foil stock. Processing and microstructure-property relations in new crossover aluminum alloys derived from 6xxx and 8xxx foil stock alloys are shown. The study demonstrates the attractive combinations of strength and ductility achieved in these new alloys.
Article
Biochemical Research Methods
Diego S. R. Coradini, Matheus A. Tunes, Patrick Willenshofer, Sebastian Samberger, Thomas Kremmer, Phillip Dumitraschkewitz, Peter J. Uggowitzer, Stefan Pogatscher
Summary: The present study demonstrates a methodology for in situ investigation of nanoalloying using metallic nanomaterials as reactants within a transmission electron microscope. The method can be used as a starting point for studying nanometallurgy and subsequent alloying of materials. The results showed that both Au and Cu nanomaterials could alloy with Al when melted in the transmission electron microscope. Overall, these results suggest that transmission electron microscope-based in situ melting and alloying is a valuable technique for studying the metallurgical processing of nanomaterials.
Article
Materials Science, Multidisciplinary
Philip Aster, Phillip Dumitraschkewitz, Peter J. Uggowitzer, Florian Schmid, Georg Falkinger, Katharina Strobel, Peter Kutlesa, Michael Tkadletz, Stefan Pogatscher
Summary: This study investigated the formation of solute clusters and their contribution to strain hardening in aluminum alloys by using APT and tensile testing. The results showed that clusters could form during plastic deformation, which was referred to as strain-induced clustering.
Article
Materials Science, Multidisciplinary
Oliver Renk, Irmgard Weissensteiner, Martina Cihova, Eva-Maria Steyskal, Nicole G. Sommer, Michael Tkadletz, Stefan Pogatscher, Patrik Schmutz, Jurgen Eckert, Peter J. Uggowitzer, Reinhard Pippan, Annelie M. Weinberg
Summary: The widespread use of magnesium is hindered by its low strength and poor corrosion resistance. However, the use of nanoscale composite architecture design can overcome these limitations and enable the development of high-strength magnesium-iron composites with low degradation rates.
NPJ MATERIALS DEGRADATION
(2022)