Article
Materials Science, Multidisciplinary
Zhiyuan Huang, Jianan Fu, Xin Li, Wenxin Wen, Hongji Lin, Yan Lou, Feng Luo, Zhenxuan Zhang, Xiong Liang, Jiang Ma
Summary: This study presents a method of ultrasonic-assisted rapid cold welding of metallic glasses without using any additives, achieving stable bonding of MG interface under high-frequency ultrasonic vibration, low temperature and low stress conditions. The ultrasonic technology accelerates atomic diffusion process, enabling rapid bonding of different compositions of MGs and potential for tuning new materials with new performance.
SCIENCE CHINA-MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
B. Bellon, A. K. Boukellal, T. Isensee, O. M. Wellborn, K. P. Trumble, M. J. M. Krane, M. S. Titus, D. Tourret, J. LLorca
Summary: This article combines casting experiments and quantitative simulations to predict local primary dendritic spacings in metallic alloys solidified in conditions relevant to industrial casting processes. The results show good agreement between experimental results and simulations for non-dilute Al-Cu alloys. Simulations suggest widening of the PDAS stability range with a decrease of the temperature gradient.
Article
Chemistry, Physical
Jaskaran Singh Saini, John P. Miska, Fuqiong Lei, Nicholas AuYeung, Donghua Xu
Summary: Metallic glasses, especially Hafnium based MGs, have superior properties to conventional crystalline metals/alloys, with HBMGs having the additional advantage of high density. However, their glass-forming ability is limited. Our discovery of two HBMGs with a critical casting diameter significantly higher than the current record allows for the production of bigger products and easier manufacturing/processing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Shuyan Zhang, Zhibin Zhang, Pengfei He, Zhenfeng Hu, Zhiyuan Jing, Yangyang Gao, Xiubing Liang
Summary: This study investigates the influence of Co content on the phase structure, thermal stability, and anti-corrosion performance of melt-spun high entropy metallic glasses. The results show that adding Co can enhance corrosion resistance in a NaCl solution, with 8 at.% Co exhibiting excellent anti-corrosion performance.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Hongzhen Li, Zhen Li, Jian Yang, Hai Bo Ke, Baoan Sun, Chen Chen Yuan, Jiang Ma, Jun Shen, Wei Hua Wang
Summary: Developing materials with excellent properties has always been a relentless pursuit of mankind. Metallic glasses (MGs) could be the ideal metallic materials if their size could be scaled up to be comparable to traditional metals. Various methods have been attempted to address this challenge, including thermodynamics-based alloy, 3D printing, and the recent artificial intelligence-guided optimal alloy. In this study, a simple and flexible approach was demonstrated to manufacture giant MGs (GMGs) with diameters more than 100 mm through the thermo-joining process. The jointed GMG samples exhibit almost the same performance as the as-cast ones, and the ability to manufacture complex 3D components such as the Chinese Zodiacs was also demonstrated. This approach may overcome the longstanding problem of glass forming ability (GFA) limitations in alloy systems and pave the way for fabricating size unlimited MGs.
SCIENCE CHINA-MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zhishuai Jin, Fuyang Cao, Guanyu Cao, Chaojun Zhang, Ziao Qiu, Lunyong Zhang, Hongxian Shen, Sida Jiang, Yongjiang Huang, Mingzhen Ma, Eckert Juergen, Jianfei Sun
Summary: This study investigates the solidification dynamics during casting of a Zr41.2-Ti13.8Cu12.5Ni10Be22.5 BMG by measuring temperature evolution and constructing distance-time curves. The results show that the casting temperature plays a crucial role in the cooling rate and the formation of nanocrystal phases in BMG components, emphasizing the importance of optimizing the casting temperature for fabrication of BMG components.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Chemistry, Physical
Pinhui Lv, Richu Wang, Chaoqun Peng, Zhiyong Cai
Summary: In this research, an Al-Li alloy billet was prepared using gas atomization and hot isostatic pressing, followed by hot extrusion and various heat treatments. The microstructural evolution and mechanical properties of the alloy were investigated. The results showed that hot extrusion improved the mechanical properties of the alloy by breaking powder boundaries and eliminating element segregation. Solution and aging treatments resulted in the precipitation of a large number of T1 and theta' phases, significantly enhancing the alloy strength. Pre-deformation before artificial aging increased the density of fine T1 phase and suppressed the formation of the sigma phase, leading to improved ductility in the T8 specimen.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Kevin Huang, Eric S. Elton, Hunter B. Henderson, Norris K. Harward, Evan M. Clarke, Logan D. Winston, Edwin M. Sedillo, Debra L. Rosas, Cherie A. Schaeffer-Cuellar, Scott A. Simpson, Tian T. Li, Nick E. Teslich, Sharon G. Torres, Amy L. DeMint, Jeffrey A. Cook, Joseph T. McKeown, Jason R. Jeffries, Alex V. Hamza, Ryan L. Stillwell
Summary: This study investigates the viability of using the Hydride-Dehydride (HDH) process coupled with plasma spheroidization as an alternative method to atomization for producing U-6 wt.% Nb powders. The HDH process produces irregularly shaped powder with U-Nb segregation and phase heterogeneity, while the subsequent spheroidization process re-homogenizes the composition and phase of the powder. The combination of HDH and plasma spheroidization offers a low-waste production route for spherical U-6 wt.% Nb powders.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
A. Lindsay Greer, Miguel B. Costa, Owain S. Houghton
Summary: There have been remarkable advances in the field of metallic glasses over the last 50 years, including an expanded range of compositions, improved production and shaping techniques, and the discovery of property combinations offering unparalleled performance. Ongoing research continues to provide fundamental insights into the structure and properties of glasses and liquids. This article focuses on the latest advances in understanding and the rapidly expanding prospects for applications.
Article
Chemistry, Physical
Karl F. Shamlaye, Joerg F. Loeffler
Summary: This study presents a series of new Mg-Ag-Y and Mg-Ag-Y-Cu bulk metallic glasses designed to achieve Mg-rich ductile glasses. The alloys tested showed compressive ductility with plastic strains ranging from 0.6% to about 0.8% with minor amounts of Cu. The study also reports on the alloy design methodology, critical casting size, thermophysical properties, and compression test data of the new alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Editorial Material
Materials Science, Multidisciplinary
Eleani Maria Da Costa, Carlos Alexandre Dos Santos
Summary: This Special Issue aims to collect research articles on the design and characterization of cast alloys, especially focusing on the interrelationship between solidification, microstructure, and properties.
Review
Materials Science, Ceramics
Li Jiang, Mianyu Bao, Yanmao Dong, Yan Yuan, Xing Zhou, Xiangkang Meng
Summary: Metallic glass (MG) is a new type of multi-component alloy with a unique disordered atomic stacking structure, which is gradually recognized as a promising anticorrosive material. This review focuses on the current studies and developments concerning corrosion resistant MGs, and provides valuable suggestions for subsequent research.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Chang Liu, Suyue Yuan, Paulo S. Branicio
Summary: Bicontinuous nanoporous metallic glasses combine the advantages of MGs and open-cell nanoporous materials. Molecular dynamics simulations of a bicontinuous nanoporous Cu64Zr36 MG with 55% porosity and 4.4 nm ligament size show anomalous mechanical behavior and the ability to effectively delocalize strain localization in MGs. This design may have potential applications in catalysis, sensors, and lightweight structural designs.
SCRIPTA MATERIALIA
(2021)
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
Multidisciplinary Sciences
Zhongji Sun, Yan Ma, Dirk Ponge, Stefan Zaefferer, Eric A. Jaegle, Baptiste Gault, Anthony D. Rollett, Dierk Raabe
Summary: The authors propose a universal thermodynamics-guided alloy design approach to assist in the discovery of crack-free materials in metal additive manufacturing. They illustrate this approach by solving the hot cracking problem using the commercially important IN738LC superalloy as a model material.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
G. Figueira, S. Dulnee, G. Y. Koga, T. P. Cataldi, C. S. Kiminami, M. J. Kaufman, P. Gargarella
Summary: Thermomechanical post-treatments were evaluated for their impact on the corrosion behavior of bulk metallic Ni57Nb33Zr5Co5 glass in simulated PEMFCs environment. While partial crystallization led to a loss in corrosion properties, the post-treated samples still met the requirements for PEMFCs and exhibited better performance than conventional alloys.
Article
Materials Science, Multidisciplinary
Gustavo Bertoli, Guilherme Y. Koga, Fernanda C. Puosso, Amy J. Clarke, Claudio S. Kiminami, Francisco G. Coury
Summary: The study investigated the wear performance of CrCoNi multi-principal element alloys, and found that the addition of carbon and refinement of primary carbides can further improve the wear resistance of the alloys.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Engineering, Manufacturing
Aylanna P. M. de Araujo, Simon Pauly, Rodolfo L. Batalha, Francisco G. Coury, Claudio S. Kiminami, Volker Uhlenwinkel, Piter Gargarella
Summary: This study investigated a metastable quasicrystal-forming Al95Fe2Cr2Ti1 alloy prepared by selective laser melting (SLM), revealing high relative density and the presence of nm-sized quasicrystalline precipitates in the microstructure. The alloy exhibited high compressive strength and ductility, suggesting the potential for fabricating higher-performance high-temperature quasicrystal-forming alloys with freedom of geometry design and lower cost.
ADDITIVE MANUFACTURING
(2021)
Article
Physics, Applied
Gustavo Bertoli, Lucas B. Otani, Amy J. Clarke, Claudio S. Kiminami, Francisco G. Coury
Summary: The Cr40Co40Ni20 alloy exhibits a single-phase face centered cubic initial structure with partial transformation to hexagonal close packed phase during straining. It shows significant yield strength-grain size dependence and high activation energy for grain growth, leading to refined grain structures. The alloy combines strength and ductility under tension, while an empirical equation is proposed to describe stacking fault energy in Cr-Co-Ni alloys to enhance deformation mechanisms.
APPLIED PHYSICS LETTERS
(2021)
Article
Metallurgy & Metallurgical Engineering
Artur Mariano de Sousa Malafaia, Carolina Aurelia Ribeiro Maestro, Marcelo Falcao de Oliveira
Summary: This study aimed to evaluate the effects of loading rate, heat treatment, and temperature on the mechanical properties of a Fe-Al-C alloy. Heat treatment increased tensile strength but had no effect on impact resistance, with hydrogen embrittlement causing more damage in low load rate tests. Tests at higher temperatures showed improved impact and tensile properties, with fracture after tensile tests exhibiting more brittle aspects than after impact tests.
INTERNATIONAL JOURNAL OF METALCASTING
(2022)
Article
Chemistry, Physical
G. Y. Koga, D. Travessa, G. Zepon, D. D. Coimbrao, A. M. Jorge, J. E. Berger, V. Roche, J. -c. Lepretre, C. Bolfarini, C. S. Kiminami, F. Wang, S. L. Zhu, A. Inoue, W. J. Botta
Summary: FeCoNiCrMoB alloys produced by melt-spinning exhibit excellent corrosion resistance in chloride media, with the formation of a nanometric-thick film composed of Fe, Co, Ni, Cr, and Mo on the alloys' surface responsible for granting the corrosion resistance of all alloys. Excessive crystallization forming borides may compromise the corrosion resistance of the alloys, highlighting the importance of maintaining amorphous structures in enhancing corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Stenio Cristaldo Heck, Marcelo Falcao de Oliveira, Eduardo Radovanovic
Summary: In this study, low-purity titanium metal was successfully produced using natural rutile sand through the FFC process. The process parameters were optimized to improve the reaction rate.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Mechanical
Joseane M. Giarola, Julian A. Avila, Osvaldo M. Cintho, Haroldo C. Pinto, Marcelo F. de Oliveira, Waldek W. Bose Filho
Summary: Hydrogen embrittlement affects the mechanical properties of steel. This study assessed the influence of hydrogen on the microstructure and fracture toughness of steel welded by friction-stir welding, simulating real-life conditions.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Gualter Silva Pereira, Thiago Roberto Felisardo Cavalcante, Matheus Castaldi Cid, Marcelo Falcao de Oliveira, Marcos Hideki Miyazaki, Julian Arnaldo Avila Diaz, Waldek Wladimir Bose Filho
Summary: This study focuses on the fatigue crack propagation of the WE43 magnesium alloy, and finds that the crack rates are higher in the sodium chloride environment compared to laboratory air, possibly due to hydrogen embrittlement and anodic dissolution.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Metallurgy & Metallurgical Engineering
Artur Mariano De Sousa Malafaia, Carolina Aurelia Ribeiro Maestro, Marcelo Falcao De Oliveira
Summary: In Part I, a melt-remelt casting process for manufacturing an Fe3Al-C alloy with good mechanical properties and low cost was introduced. In Part II, the cyclic oxidation behavior and oxide layer formation of the alloy were evaluated, showing promising oxidation behavior for high-temperature applications.
INTERNATIONAL JOURNAL OF METALCASTING
(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
David D. S. Silva, Alexandre R. C. Nascimento, Guilherme Y. Koga, Guilherme Zepon, Claudio S. Kiminami, Walter J. Botta, Claudemiro Bolfarini
Summary: Ferritic stainless steels armored with borides were tested for their endurance in both abrasive and corrosive environments. It was found that the alloy containing 1.2 wt.% B exhibited the best tribocorrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Joao Gabriel da Cruz Passos, Bruno Xavier de Freitas, Rodrigo da Silva, Carlos Alberto Della Rovere, Rodrigo Magnabosco, Marcelo Falcao de Oliveira, Artur Mariano de Sousa Malafaia
Summary: This study investigates the formation of ferritic layer and its effect on high-temperature oxidation resistance in Mn-rich austenitic alloys. The relationship between mass variation and ferrite thickness was established, and the depletion of Mn and Cr was observed due to the formation of Mn2O3/MnCr2O4. Thermodynamic phase diagrams showed the stability of ferrite at high temperatures affecting oxidation resistance. DICTRA analyses were used to study the changes in Mn concentration profile during oxidation to explain the growth of the ferritic layer.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Jessica Bruna Ponsoni, Mateusz Balcerzak, Walter Jose Botta, Michael Felderhoff, Guilherme Zepon
Summary: This study investigates a multicomponent alloy with C14 Laves phase structures, which demonstrates promising hydrogen storage capabilities at room temperature. The alloy was designed using computational thermodynamic tools and synthesized as a single C14 Laves phase. Experimental results show that the alloy can reversibly absorb and desorb a large amount of hydrogen at room temperature under moderate pressures, with excellent cycling stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Nelson Delfino de Campos Neto, Leonardo Pratavieira Deo, Marcio Andreato Batista Mendes, Michael Joseph Kaufman, Marcelo Falcao de Oliveira
Summary: The microstructure of a melt-spun Zr28Ni44Cu28 alloy was characterized to determine the structures and compositions of crystalline phases that compete with glass formation. Two crystalline phases were identified, including a face centered cubic zirconium oxide phase and a primitive cubic version of the big-cube oxide phase. The results indicate the preferential interaction between Zr-O atomic pair, supporting the formation of Zr-based oxides over equilibrium phases. The findings provide insight into the mechanisms of oxygen-induced crystallization in Zr-based bulk metallic glasses and the decrease in glass forming ability with increasing oxygen concentrations.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2022)
Article
Chemistry, Physical
M. H. Abbasi, R. Tavakoli, S. G. Shabestari
Summary: The correlation between atomic-scale structure and glass-forming ability of ternary bulk metallic glasses was investigated using molecular dynamics simulation. It was found that the potential energy of the icosahedra reflects the geometric ordering, while the virial stress energy density reveals the chemical ordering. Based on this discovery, a new prediction criterion for glass-forming ability was proposed and validated using experimental data.
Article
Chemistry, Physical
Haimin Zhai, Shuai Cui, Sheng Li, Dongqing He, Bo Cheng, Xinjian Zhang, Wensheng Li, Zhornik Viktor, Uladzimir Seniuts
Summary: Laser shock peening (LSP) treatment significantly affects the phase structure and properties of titanium-based BMG materials, promoting rejuvenation and introducing heterogeneity. This leads to improved plasticity and resistance to crack propagation. LSP-1 specimen exhibits higher hardness and plasticity, reducing fatigue peeling wear caused by brittleness. However, excessive LSP results in increased susceptibility to pitting and significantly reduces tribocorrosion resistance.
Article
Chemistry, Physical
Olga A. Blatova, Maria A. Solodovnikova, Ekaterina M. Egorova, Vladislav A. Blatov
Summary: This study applied a universal geometrical-topological approach to analyze the crystal structures of intermetallic compounds deposited in the Inorganic Crystal Structure Database. By exploring the local atomic configurations, they identified different types of coordination polyhedra and proposed criteria for determining geometric instability. This research provides useful indicators for checking crystallographic information and validating structural models.
Article
Chemistry, Physical
Jose M. Torralba, Diego Iriarte, Damien Tourret, Alberto Meza
Summary: The amount of globally recycled e-waste is less than 20% of the total produced. One of the causes for this low recycling rate is the complex and expensive selective sorting of metals. However, recent research has shown that high entropy alloys (HEAs) can be made from complex alloy mixtures, reducing the dependence on pure critical metals. It has been demonstrated that e-waste can be used to produce competitive HEAs.
Article
Chemistry, Physical
M. Y. He, Y. F. Shen, N. Jia, W. Y. Xue, J. P. Li
Summary: This study successfully improved the mechanical properties of high-entropy alloys (HEAs) through phase decomposition modulation, achieving strengthening of low-cost CuFeMnNi HEAs. The annealed HEAs exhibited excellent mechanical properties, with significantly increased yield strength and maintained satisfactory elongation.
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
Chemistry, Physical
Zhenhua Han, Yubo Tian, Jun Yang, Jianzhao Li, Jinyang Zhang, Gang Liu, Ran Wei, Guojun Zhang
Summary: In this study, a novel medium-entropy alloy (MEA) (Fe65Ni15Cr10Co10)92Ti5Al3 with a dual heterogeneous structure was developed by adding Ti and Al to a previously reported Fe65Ni15Co10Cr10 MEA. The MEA exhibited ultra-high ultimate tensile strength and work hardening extent at room temperature. The addition of Ti and Al induced precipitation and resulted in a continuous FCC -> BCC martensitic transformation and a transformation-induced plasticity effect. The excellent mechanical properties of the alloy were attributed to the synergistic effects of hetero-deformation induced strengthening, precipitation strengthening, and TRIP.
Article
Chemistry, Physical
S. Y. Liang, L. T. Zhang, B. Wang, Y. J. Wang, E. Pineda, J. C. Qiao
Summary: This study focuses on the influence of the thermomechanical protocol on the aging or rejuvenation of glass by decoupling the thermal and mechanical processes. The results show that Labased metallic glass exhibits material hypomnesia, with a clearer rejuvenation trend observed after imposing increasing amplitude strain oscillations. There is a threshold value of the oscillation amplitude that separates the effects of the protocol into acceleration of aging or rejuvenation. This study reveals the correlation between the thermomechanical properties of metallic glass and the previous application of strain oscillations of various amplitudes, providing an effective tool for regulating the structural state of metallic glasses through a simple-operated method.
Article
Chemistry, Physical
Chihui Liu, Hua Zhang, Qing Wang, Panzhi Wang, Jiadian Yang, Fanchao Meng, Xin Zhou, Lilong Zhu, Shangzhou Zhang, Liang Jiang
Summary: Thermal deformation behavior and microstructure evolution of GH141 alloy were efficiently studied using high-throughput double-cone gradient compression. Different compression temperatures resulted in a wide gradient equivalent strain distribution and gradient microstructure. The dynamic recrystallization mechanism shifted towards discontinuous dynamic recrystallization with increasing compression temperature.
Article
Chemistry, Physical
D. Dubaux, J. Zollinger, M. -C. de Weerd, J. Ghanbaja, S. Mathieu, S. Migot, P. Boulet, S. Sturm, V. Fournee, M. Sicot, J. Ledieu
Summary: We report the formation of large and highly twinned dendrites of the Al13Fe4 approximant phase embedded in an fcc Al-rich matrix. Using a rapid cooling technique, the approximant appears as a 10-fold dendrite. The grain distributions within the arm are complex and a single dendrite arm can contain up to four different orientations. Three types of twins, namely {100}, {001} and {201} twins, have been identified. A growth mechanism involving heteroepitaxial growth from a decagonal Al-Fe quasicrystalline seed is proposed to explain the formation of these specific 10-fold motifs.
Article
Chemistry, Physical
Ming Yang, Yibo Zhang, Jie Dong, Yan Huang, Zhichao Lu, Liang Wang, Xuerui Wei, Zhengdong Fu, Jinkui Zhao, Wenli Song, Wei Li, Yuntao Liu, Dong Ma
Summary: A multi-element microalloying strategy has been used to improve the microstructure and mechanical properties of CuZr-based bulk metallic glass composites. Microalloying effectively refines the CuZr phase and results in finely dispersed B2 crystallites embedded in the BMG matrix, leading to the formation of centimeter-sized BMGCs with good mechanical properties.
Article
Chemistry, Physical
Xuejie Zhu, Xuexi Zhang, Mingfang Qian, Ziyi Wang, Aibin Li, Zongning Chen, Muhammad Imran, Lin Geng
Summary: The homogeneous superelastic behavior in shape memory alloys (SMAs) is crucial for their functional and structural fatigue properties, as well as their stable elastocaloric effect (eCE). In this study, a Ti-22Nb-4Zr-2Ta plate was prepared with a strong recrystallized texture, resulting in a completely recoverable superelastic strain and narrow hysteresis. The observation of strain and temperature evolution revealed the importance of diffuse transformation and favorable texture in achieving mesoscopically homogeneous transformation and related elastocaloric effect.
Article
Chemistry, Physical
Mohammad Navazani, Sitarama Raju Kada, Daniel Fabijanic, Matthew Barnett
Summary: This study investigates the effect of Cu and Al addition on an alloy containing multiple principal elements. The results show that adding small amounts of Cu can improve the alloy's ductility and the hardness of the FCC phase can be predicted using a hybrid model. Unlike previous studies, the corrosion resistance of the alloy is not affected by Cu addition, indicating its potential for further development into a fine-grained stainless steel alloy.
Article
Chemistry, Physical
Fatemeh Azizian, Homam Naffakh-Moosavy, Fatemeh Bagheri
Summary: Novel biodegradable Zn-xCu-0.8Mn-0.4Ag alloys were prepared in this study, and the effects of Cu addition and hot extrusion process on microstructure, mechanical properties, and cytotoxicity of the alloys were investigated. The results showed that adding copper and performing a hot extrusion process can significantly improve the mechanical properties of the alloys, making them potential candidates for cardiovascular stents.
Article
Chemistry, Physical
Ivan A. Ditenberg, Denis A. Osipov, Ivan Smirnov, Konstantin V. Grinyaev
Summary: This study investigates the effect of high-temperature annealing on the structural-phase state and microhardness of Ni3Al samples obtained by spark plasma sintering after high-energy ball milling. The results show that certain annealing temperatures promote grain growth and high-density nucleation, leading to the formation of a fine-grained structural state. The study also analyzes the influence of annealing temperature on the strengthening mechanisms.
