Article
Nanoscience & Nanotechnology
N. A. Richter, Y. F. Zhang, M. Gong, T. Niu, B. Yang, S. Xue, J. Wang, H. Wang, X. Zhang
Summary: This study presents a solute synergy strategy to stabilize the microstructures and improve thermal stability in high strength nanotwinned (NT) Al-Co-Zr alloys. Zr solute additions promote microstructural and mechanical stability up to 400 degrees C. In-situ microcompression tests demonstrate high strengths and deformability in these ternary NT alloys. Density functional theory calculations provide insight into the interplay between Co and Zr solute and their role in stabilizing incoherent twin boundaries. This work offers a strategy for enhancing both strength and thermal stability of nanocrystalline materials through synergistic solute pairs.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Physics, Condensed Matter
B. A. Rusanov, V. E. Sidorov
Summary: The density of Al-Ni-Co-R (R = Nd, Sm, Gd, Tb, Yb) glass-forming alloys is experimentally studied using the gamma-absorption method in a wide temperature range that includes both the crystalline and liquid states. The molar volumes and thermal expansion coefficients are calculated based on the experimental data. It is observed that these melts remain strongly microheterogeneous systems at small overheatings above the liquidus. The effect of different melt heat treatment regimes before quenching is discussed.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Vadim Mikhaylovich Bespalov, Denis Sergeevich Voroshilov, Viktor Aleksandrovich Berngardt, Sergey Borisovich Sidelnikov, Igor Lazarevich Konstantinov, Alexander Vasilyevich Durnopyanov, Yuriy Viktorovich Baykovskiy, Mikhail Mikhaylovich Motkov, Timofey Vladimirovich Bermeshev, Diana Dmitrievna Bespalova, Marina Vladimirovna Voroshilova, Yulbarskhon Nabievich Mansurov
Summary: This article discusses the properties and structure of a conductor wire made of aluminum, zirconium, cerium, and iron, and the manufacturing process using the method of ingotless rolling-extrusion. By replacing a part of zirconium and applying the ingotless rolling-extrusion method, the cost of manufacturing the alloy and the number of technological operations are reduced, while achieving the necessary properties of the wire. The effects of annealing on the properties of the wire are also studied.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Shuhao Yang, Andre Anderko, Richard E. Riman, Alexandra Navrotsky
Summary: This study evaluates the thermodynamic properties of rare earth oxyfluorides (REOF) with varying RE elements and investigates the phase transitions of YbOF. It is found that REOF compounds are energetically stable relative to the binary oxides and fluorides, and the RE-O interactions contribute to their thermodynamic stabilities. REOF with small cations possess the monoclinic structure as the more energetically stable phase at room temperature.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Applied
Qiang He, Jinfa Chen, Limei Gan, Menglan Gao, Miaomiao Zan, Yanfei Xiao
Summary: Clay minerals play a crucial role in ion adsorption type rare earth ore, controlling the adsorption and desorption processes of rare earth. Experimental studies reveal that the adsorption and competitive adsorption abilities of cations depend on their charge and hydrolysis properties, while the desorption of rare earth and aluminum is influenced by the concentration driving forces of high concentrations of magnesium and ammonium ions, although high-concentration desorbents may hinder the desorption reactions. Additionally, the solid-phase Al(OH)(3) generated at high peak aluminum concentration delays the efflux of aluminum, partially separating rare earth from aluminum.
JOURNAL OF RARE EARTHS
(2023)
Article
Nanoscience & Nanotechnology
Frank Czerwinski
Summary: The strength retention of Al-Ce binary alloys at high temperatures was assessed compared to A380 alloy and pure Al. The Al11Ce3 eutectic and proeutectic phases were found to have limited effectiveness in strengthening Al-Ce alloys at room temperature and retaining their strength at increased temperatures. Despite the high hardness retention ratio of Al-Ce alloys, the yield stress decreased with testing temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Gelson L. C. Rodrigues, Tainara G. de Oliveira, Suziete B. S. Gusmao, Thalles M. F. Marques, Odair P. Ferreira, Anupama Ghosh, Clenilton C. dos Santos, Raquel Milani, Ramon R. P. Garcia, Bartolomeu C. Viana
Summary: The effects of rare earth ions on the optical properties of titanate nanotubes were investigated through ion exchange and thermal treatment.
Article
Materials Science, Multidisciplinary
Andreja Jelen, Jae Hyuck Jang, Junhyup Oh, Hae Jin Kim, Anton Meden, Stane Vrtnik, Michael Feuerbacher, Janez Dolinsek
Summary: Rare-earths-based hexagonal high-entropy alloys (HEAs) are closer to an ideal solid solution. Three candidates for ideal HEAs were synthesized through high-frequency levitation melting, exhibiting a nanostructure of hcp matrix and ccp precipitates. The lattice distortions caused by minute differences in atomic radii contribute to the nanostructure and the reduction of lattice strain energy.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Coatings & Films
Peter Totaro, Boris Khusid
Summary: This study demonstrated the overall advantages of multistep anodization for heat-treated wrought aluminum alloy AA7075-T6, showing that multistep processes can improve coating properties and morphology, increase abrasion resistance and hardness of the coatings.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Andrey Mochugovskiy, Anton Kotov, Majid Esmaeili Ghayoumabadi, Olga Yakovtseva, Anastasia Mikhaylovskaya
Summary: The addition of Ni in the Al-Mg-Si-Cu-based alloy was found to enhance superplasticity, improve grain morphology and distribution, and enhance elongation-to-failure under high temperature and large strain rate.
Article
Materials Science, Multidisciplinary
C. S. Hattori, G. F. C. Almeida, R. L. P. Goncalves, R. G. Santos, R. C. Souza, W. C. da Silva Jr, J. R. C. Cunali Jr, A. A. Couto
Summary: This study aimed to obtain two aluminum alloys by extrusion, evaluating their microstructural characteristics and fatigue behavior. AA7046 exhibited better tensile and fatigue properties compared to AA7108.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Martin Jensen, Walace Kierulf-Vieira, Patricia J. Kooyman, Anja O. Sjastad
Summary: This study reports the first variable temperature in situ transmission electron microscopy study on smaller Pt-Rh nanoparticles under vacuum conditions. The research reveals the tendency of elemental mixing/segregation in Pt-Rh nanoparticles of different sizes. The results demonstrate the technique's ability to extract valuable information concerning the dynamic processes that take place in the bimetallic Pt-Rh system at the nanoscale.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, F. R. Pratama
Summary: In this study, the growth rate of a crystalline phase in the Al-Fe-Mn-Si metallic glass was measured in real time using transmission electron microscopy. The effective diffusion coefficient related to the slowest diffusing element (Mn) was estimated. The results showed that the growth rate of the crystalline phase was significantly faster compared to pure Al and AlFe compound.
Article
Materials Science, Multidisciplinary
Andrey G. Mochugovskiy, Alexey S. Prosviryakov, Nataliya Yu Tabachkova, Anastasia Mikhaylovskaya
Summary: The current study focuses on the influence of Ce on the superplastic behavior, microstructure, and mechanical properties of the Al-Mg-Si-Cu-Zr-Sc alloy. Through thermomechanical treatment and annealing methods, nanoscale dispersoids were formed to improve the alloy's superplastic properties.
Article
Chemistry, Physical
Liying Cui, Zhan Zhang, X. -Grant Chen
Summary: A series of lightweight Al-based entropy alloys doped with Cu, Zn, Cr, V, Ti, and Fe were designed for high-temperature applications. The microstructure, mechanical properties, and thermal stability of six entropy alloys were investigated. The high-Cu alloys exhibited excellent thermal stability and high yield strengths, indicating their potential for high-temperature applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Materials Science, Multidisciplinary
Frank Czerwinski
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Frank Czerwinski
MATERIALS SCIENCE AND TECHNOLOGY
(2020)
Article
Metallurgy & Metallurgical Engineering
Frank Czerwinski
INTERNATIONAL JOURNAL OF CAST METALS RESEARCH
(2020)
Article
Chemistry, Physical
Frank Czerwinski, Babak Shalchi Amirkhiz
Article
Nanoscience & Nanotechnology
Frank Czerwinski
Summary: The strength retention of Al-Ce binary alloys at high temperatures was assessed compared to A380 alloy and pure Al. The Al11Ce3 eutectic and proeutectic phases were found to have limited effectiveness in strengthening Al-Ce alloys at room temperature and retaining their strength at increased temperatures. Despite the high hardness retention ratio of Al-Ce alloys, the yield stress decreased with testing temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Marta Aniolek, Tyler Smith, Frank Czerwinski
Summary: This study utilized DSC and CCTA thermal analysis techniques to evaluate the solidification and melting behavior of Al-Ce binary alloys, revealing significant differences in reaction temperatures under different alloy compositions that may exceed the typical measurement errors for each technique. Additionally, differences were observed in detecting certain reactions and non-equilibrium effects between DSC and CCTA.
Article
Materials Science, Multidisciplinary
Frank Czerwinski
Summary: Al-Ni binary alloys containing Al3Ni eutectic and proeutectic phases showed the capability to retain strength at high temperatures, with the contribution of Al3Ni phases decreasing as temperature increased, especially above 300 degrees C. The finer Al3Ni eutectic phase was found to be more effective in strengthening the alloy compared to the coarser Al3Ni proeutectic phase, which lost its influence completely above 300 degrees C.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Review
Chemistry, Physical
Frank Czerwinski
Summary: The automotive lightweighting trends are driven by sustainability, cost, and performance, generating a high demand for lightweight materials and design concepts in modern mobility and transportation as part of circular economy solutions. Current strategies focus not only on weight reduction, but also on structural efficiency, economic and environmental impacts, and guidelines for materials selection, substitution rules, and multi-material design paradigm to address global R&D activities and industry transition.
Article
Nanoscience & Nanotechnology
Frank Czerwinski, Marta Aniolek, Jian Li
Summary: Although Al3Ni fibers exhibit high coarsening resistance at high temperatures, they are ineffective in retaining strength, only maintaining 20% of room-temperature level at 500 degrees Celsius. During uniaxial compression at 400-500 degrees Celsius, both eutectic and pure aluminum show steady-state flow stress with negligible work hardening rate.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Frank Czerwinski, Babak Shalchi Amirkhiz
Summary: An attempt to strengthen aluminum-cerium-based alloys through silicon additions resulted in significant increases in strength but reduced ductility. Silicon also caused changes in alloy crystallization and a shift from ductile to brittle fracture behavior.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Editorial Material
Chemistry, Physical
Frank Czerwinski
Review
Chemistry, Physical
Frank Czerwinski
Summary: This article assesses the fundamentals of critical minerals and their importance in the future transportation sector, as well as the current global efforts to meet the needs of automotive supply chains and environmental concerns. The implementation of large quantities of minerals, especially metals, in the manufacturing of zero-emission vehicles brings new challenges to energy security. To minimize the impact of a metal-intensive transition to clean transportation, further progress in understanding the properties of critical materials and optimizing their use through sustainable exploration of resources and a circular economy will be required.
Article
Materials Science, Multidisciplinary
Frank Czerwinski
Summary: The discovery of a quaternary eutectic reaction in the Al5Ce3Si0.5Mg alloy, which was not anticipated based on existing phase diagrams and computational thermodynamic calculations, was reported. The role of minor additions of magnesium in the growth mechanism was emphasized. The resulting ultrafine near-spheroidal phases exhibited divorced growth characteristics.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Frank Czerwinski
Summary: The research indicates that the novel cast aluminium eutectic systems of Al-Al3Ni and Al-Al11Ce3 do not show significant advantages over the traditional Al-Si base at high temperatures up to 500 degrees C. While there are differences in diffusivities of silicon, nickel, and cerium in aluminium, as well as eutectic melting temperatures and coarsening resistance of Al3Ni and Al11Ce3 phases, the observed similarities in temperature-related strengthening-reduction across all three eutectics highlight the need for further development criteria for heat-resistant aluminium alloys.
MATERIALS SCIENCE AND TECHNOLOGY
(2021)