Article
Materials Science, Ceramics
Shuangshuang Chen, Kai Qi, Jun Yin, Jiahua Zou, Peidi Song, Guosheng Peng
Summary: The authors presented a series of monolithic Zr-Cu-Ni-Ti-Al bulk glassy alloys, showing significant room-temperature plasticity and high glass-forming ability. The plasticity of the alloy increases with decreasing Cu content, while the GFA gradually improves upon substitution of Cu for Zr.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
S. Xu, J. Pons, R. Santamarta, I Karaman, O. Benafan, R. D. Noebe
Summary: This study reports the existence of a strain glass state induced by the precursor stages of H-phase precipitation in Ni-Ti-Zr shape memory alloys, with superelastic effect observed in compression. The material exhibits recoverable strain levels over 4% with little temperature dependence of the stress-strain curves.
Article
Materials Science, Multidisciplinary
C. Liu, A. Inoue, F. L. Kong, S. L. Zhu, E. Shalaan, A. Al-Ghmadi, A. L. Greer
Summary: Zr70-76 Al7-7.5Ni13-15Cu2Ag2-5 glassy alloys were prepared by melt-spinning and copper-mold casting, showing excellent mechanical properties and plasticity. The 70-72Zr and 74Zr alloys were cast as bulk rods with glass and [glass + beta-Zr +omega-Zr] phases, while the 76Zr alloy was prepared as a thick ribbon. The Zr-rich glassy ribbons also exhibited good bending plasticity after annealing.
Article
Materials Science, Multidisciplinary
Dalibor Preisler, Tomas Krajanak, Milos Janecek, Jiri Kozlik, Josef Strasky, Michal Brazda, Jan Dzugan
Summary: Bulk Nb-Ta-Ti-Zr refractory complex concentrated alloy (RCCA) was prepared using the additive manufacturing method of directed energy deposition (DED) from an equiatomic mixture of elemental powders. Scanning velocity was varied to investigate the effect of different heat inputs, and it was found that decreasing scanning velocity effectively reduced the number of undissolved Nb/Ta particles in the microstructure. Preheating the platform to 500 degrees C during deposition resulted in the best microstructure homogeneity. Homogenization annealing at 1400 degrees C/24 h was performed, but complete Ta particles dissolution was not achieved. Optimization of deposition parameters is crucial for achieving reasonable microstructure homogeneity in RCCA produced from elemental powders, as homogenization annealing cannot eliminate heterogeneities at the scale of powder particles size.
Article
Chemistry, Physical
C. Liu, A. Inoue, F. L. Kong, S. L. Zhu, E. Shalaan, A. Al-Ghmadi, A. L. Greer
Summary: The glass-forming ability, thermal stability, and mechanical properties of new Zr-rich alloys were evaluated. Melt-spinning produced glassy and amorphous phases, which showed good bending plasticity after annealing. The precipitate dispersions in the amorphous phases contributed to high strength and plastic strain. These findings are significant for the engineering application of Zr-based bulk metallic glasses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Guoqing Yu, Xiaoqian Bao, Xiao Xu, Xin Wang, Junsong Jin, Pan Gong, Xinyun Wang
Summary: A series of Ta-rich particle reinforced Zr-based bulk metallic glass composites were fabricated successfully by arc-melting copper-mold spray casting. The effects of Ta content on room temperature plasticity, compressive strength, and thermoplastic formability were investigated. The composites showed work hardening rather than strain softening after stress overshoot, and the deformation behavior in the supercooled liquid region was studied systematically. A back-propagation artificial neural network optimized by particle swarm optimization and genetic algorithm was used to establish a constitutive model, which accurately described the hot-deformation behavior of these Zr-based bulk metallic glass composites in the supercooled liquid region.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Yichen Wang, Duo Yu, Jie Yin, Buhao Zhang, Hangfeng Zhang, Xuejian Liu, Yulong An, Michael J. Reece, Zhengren Huang
Summary: The ablation behavior of HEC-0 and the effect of SiC content on ablation resistance were investigated. The results showed that the complex oxide layer played a positive role in reducing the linear ablation rate of HEC-0. The addition of SiC significantly improved the ablation resistance of the composites.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Pengfei Ji, Shuguang Liu, Hongyun Deng, Hongzhi Ren, Jingkang Zhang, Taojian Sun, Kuixue Xu, Chunbao Shi
Summary: Coatings prepared by magnetron sputtering on titanium alloy substrates can improve the surface hardness and corrosion resistance of the alloy, effectively hinder the growth of columnar structures, and exhibit excellent cytocompatibility.
Article
Nanoscience & Nanotechnology
Qiqi Hou, Tuo Wang, Jialu Zhou, Xiong Zhou, Qi Hao, Jichao Qiao
Summary: A method of static quenching has been proposed for the preparation of Zr-based bulk metallic glass (BMG) in this study. The compressive plasticity of Zr60Ni25Al15 BMG can be significantly improved from almost 0 to 6.5% using the static quenching method. The improved plasticity is attributed to the higher cooling rate and the presence of more soft spots in the static quenching sample compared to suction casting.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yihan Wu, Wenshan Yu, Shengping Shen
Summary: In this paper, a supervised machine learning framework powered by the distributed breeder genetic algorithm (DBGA) is proposed to train a charge transfer ionic potential (CTIP) for the multi-component Hf/Nb/Ta/Ti/Zr/O system. The developed potential is rigorously validated and used to study the atomic structure and its evolution in RHEA. The simulation results provide valuable atomistic information and display promising prospects for large-scale reactive simulations.
MATERIALS & DESIGN
(2023)
Article
Engineering, Manufacturing
Maximilian Frey, Jan Wegner, Erika Soares Barreto, Lucas Ruschel, Nico Neuber, Bastian Adam, Sascha Sebastian Riegler, Hao-Ran Jiang, Gerd Witt, Nils Ellendt, Volker Uhlenwinkel, Stefan Kleszczynski, Ralf Busch
Summary: Laser powder bed fusion of CuTi-based bulk metallic glasses in the Vit101 system has been successfully achieved for the first time, surpassing the mechanical performance of most Zr-based BMGs. The study reveals that thermal stability has a minor role in producing amorphous specimens, while notch toughness is crucial for achieving defect-free parts with high mechanical performance. The results suggest a shift towards toughness-oriented optimization strategies for alloy development in the PBF-LB/M-process, departing from traditional casting-based glass forming ability optimization.
ADDITIVE MANUFACTURING
(2023)
Article
Metallurgy & Metallurgical Engineering
Cui-ping Wang, Peng Yang, Yu-hui Liang, Shui-yuan Yang, Jia-jia Han, Yong Lu, Xing-jun Liu
Summary: The phase diagrams of the Ni-Ti-Ta ternary system were determined at 1000 and 1200 degrees C using X-ray diffraction and electron probe microanalysis. The experimental results revealed the presence of a ternary compound called tau phase with low solid solubility at 1000 degrees C. The terminal solid solutions formed a continuous solid solution at both temperatures.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Ceramics
Hongqi Shi, Hao Zhou, Zhenghao Zhou, Yi Ding, Wenjuan Liu, Jin Ji
Summary: The addition of Fe to Zr-Cu-Al-Ni-Ti alloys can greatly affect their mechanical and corrosion resistance performance, with moderate Fe content improving compressive strength, plasticity, and corrosion resistance, while excessive Fe content may lead to the inability to form metallic glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
R. J. Mu, Z. W. Yang, S. Y. Niu, K. B. Sun, Y. Wang, D. P. Wang
Summary: The study successfully achieved the bonding of (Hf0.2Zr0.2Ti0.2Ta0.2Nb0.2)C high-entropy ceramic through direct diffusion bonding and a metallic Ni foil as an interlayer, demonstrating reliable mechanical properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Annamaria Naughton-Duszova, David Medved, Lenka Dakova, Alexandra Kovalcikova, Peter Svec, Peter Tatarko, Hakan Unsal, Pavol Hvizdos, Pavol Sajgalik, Jan Dusza
Summary: The wear characteristics of a fine-grained dual-phase high-entropy (Ti0.14Zr0.2Nb0.2Hf0.2Ta0.26)C + (Ti0.38Zr0.18Nb0.22Hf0.115Ta0.105)B-2 were studied using the ball-on-flat technique in air. The material had high density, small grain size, and high hardness. The friction coefficient increased with sliding distance, and the specific wear rate decreased with increasing sliding distance. The dominant wear mechanisms were oxidation-driven tribo-chemical reaction and tribo-layer formation in boride grains, as well as mechanical wear in carbide grains.
ADVANCES IN APPLIED CERAMICS
(2023)
Article
Materials Science, Multidisciplinary
Rathinavelu Sokkalingam, Zhao Chao, Katakam Sivaprasad, Veerappan Muthupandi, Jayamani Jayaraj, Parthiban Ramasamy, Juergen Eckert, Konda Gokuldoss Prashanth
Summary: CoCrFeMnNi high-entropy alloy/AISI 316L stainless steel bimetal was fabricated using SLM, showing enhanced hardness and tensile strength due to the composition and structure advantages. However, the presence of defects and higher susceptibility to pitting corrosion in CoCrFeMnNi-HEA make it more prone to corrosion attack in corrosive environments.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sabine C. Bodner, Kostyantin Hlushko, Kevin Kutlesa, Juraj Todt, Oliver Renk, Michael Meindlhumer, Florian Resch, Marc-Andre Nielsen, Jozef Keckes, Jurgen Eckert
Summary: The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are explored in this study. The results show that the applied hatch strategy has a significant impact on the microstructure and mechanical properties of the samples, especially the anisotropy observed in the plane perpendicular to the build direction.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sepide Hadibeik, Florian Spieckermann, Martin Nosko, Farzad Khodabakhshi, Mahmoud Heydarzadeh Sohi, Juergen Eckert
Summary: A novel approach for fabricating bulk metallic glass using additive manufacturing has been studied, however, there are challenges, such as unmelted powder and compositional deviation, that need further investigation to optimize the process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jelena Petrusa, Benjamin Meier, Gerda Gruenbacher, Wolfgang Waldhauser, Juergen Eckert
Summary: The effects of laser energy density on the relative density and microstructure of cp-TiGd2 fabricated by LB-PBF were studied, and the influence of printing orientation and different surface treatments on surface topography and biocompatibility were investigated. The aim is to develop additive manufacturing process parameters that can achieve full density and satisfactory biocompatibility for cp-TiGd2 as a low-cost alternative to biomedical materials. An optimized process with high density, improved surface roughness, and noncytotoxicity was achieved using a wide range of process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Zequn Zhang, Simon Fellner, Sergey Ketov, Megan J. Cordill, Huaping Sheng, Christian Mitterer, Kaikai Song, Christoph Gammer, Juergen Eckert
Summary: The phase evolution of alloys and atomic diffusion are closely related. However, the influence of reactive diffusion on phase formation in high-entropy alloys (HEAs) is still not clear. This study investigates the phase evolution of a multicomponent CoCrFeNi/Al diffusion couple and reveals the combined effects of enthalpy and entropy on phase formation in HEAs at elevated temperatures. Surface modification of HEAs can be achieved through film deposition and annealing processes.
Review
Electrochemistry
Baran Sarac, A. Sezai Sarac, Juergen Eckert
Summary: This review provides an introduction to the use of advanced amorphous metal catalysts for hydrogen storage and production via electrochemistry. Pd-based metallic glasses have gained significant attention due to their unique atomic structure and properties for energy applications. The review covers the fabrication techniques, hydrogen sorption, hydrogen evolution, kinetics, and future prospects of Pd-based metallic glasses. Overall, it offers a comprehensive overview for large-scale hydrogen energy storage and production systems.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Ming-Zhi Zhang, Kun Zhang, Kai-Kai Song, Xiao-Yu Zou, Wei-Dong Song, Ke-Feng Li, Li-Na Hu, Ze-Qun Zhang, Juergen Eckert
Summary: In this study, CoCrFeMnNi high-entropy alloys with a surface gradient nanostructure were produced using industrial shot blasting, which significantly improved their mechanical properties. The severely plastically deformed surface layer had a multi-scale hierarchical structure and increased in depth with shot-blasting time. The microhardness and tensile strength of the alloy were significantly higher after shot-blasting. The improved strain hardening and prevention of early necking in the gradient-nanostructured surface layer contributed to its high toughness.
Article
Chemistry, Physical
Monika Antoni, Florian Spieckermann, Niklas Plutta, Christoph Gammer, Marlene Kapp, Parthiban Ramasamy, Christian Polak, Reinhard Pippan, Michael J. J. Zehetbauer, Juergen Eckert
Summary: The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on Fe73.9Cu1Nb3Si15.5B6.6 and Fe81.2Co4Si0.5B9.5P4Cu0.8 iron-based metallic glasses were compared. HPT processing extended the consolidation and deformation ranges for Fe73.9Cu1Nb3Si15.5B6.6, and achieved consolidation and deformation with minimum cracks for Fe81.2Co4Si0.5B9.5P4Cu0.8 for the first time. Various analyses revealed that Fe81.2Co4Si0.5B9.5P4Cu0.8 exhibited HPT-induced crystallization phenomena, while Fe73.9Cu1Nb3Si15.5B6.6 did not crystallize even at high HPT-deformation degrees.
Editorial Material
Chemistry, Multidisciplinary
Juergen Eckert, Daniel Kiener
Article
Chemistry, Physical
Keziban Huner, Baran Sarac, Eray Yuece, Amir Rezvan, Matej Micusik, Maria Omastova, Juergen Eckert, A. Sezai Sarac
Summary: The incorporation of iron and carboxylic acid-functionalized polyaniline into polymeric polycaprolactone structures enhances the electron-donating ability and conductivity of the compound, making it suitable for electrochemical immunosensors.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Engineering, Mechanical
Bin Chen, Yunli Li, Daniel Sopu, Juergen Eckert, Wenping Wu
Summary: The shock-induced dynamic mechanical behavior and spallation failure of Ni-based single crystal superalloys are studied using non-equilibrium molecular dynamic simulations. Two modes of classical spallation and micro-spallation are observed during the spallation failure. The deformation mechanism is dominated by slip and drag of dislocations at low shock velocities, while complex phase transitions from FCC to BCC or disordered structures occur at higher velocities, leading to a decrease in spallation strength. The presence of voids significantly lowers the spallation strength, and the reduction in strength is proportional to the radius of the voids.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Xiaoming Liu, Zongde Kou, Ruitao Qu, Weidong Song, Yijia Gu, Changshan Zhou, Qingwei Gao, Jiyao Zhang, Chongde Cao, Kaikai Song, Vladislav Zadorozhnyy, Zequn Zhang, Juergen Eckert
Summary: This study utilizes high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co34Cr32Ni27Al3.5Ti3.5 multicomponent alloy. Hot extrusion reduces grain sizes and promotes the precipitation of nanoparticles inside the FCC matrix and grain boundaries. Subsequent annealing regulates the microstructures and enhances the mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ming-Wei Wu, Kai Ni, Yang Lei, Xin-Xing Xiong, Yi-Ting Chuang, Quiao-En Lin, Pei Wang, Parthiban Ramasamy, Juergen Eckert
Summary: Selective laser melting (SLM) was utilized to produce CuZrAl metallic glass (MG) scaffolds with combined lattice structures of body-centered cubic and face-centered cubic (F2BCC), and the effects of lattice structures on mechanical behavior were investigated. The results revealed that curved struts remarkably enhanced compressive ductility by 122% and energy absorption by 106%. The presence of curved struts effectively prevented catastrophic shear fracture and delayed fracture occurrence due to the release of strain concentrations. This study demonstrates the potential of improving the ductility and toughness of SLM MG components through appropriate lattice structure design.
Article
Materials Science, Multidisciplinary
Xintian Wang, Zhiyong Ji, Robert O. Ritchie, Ilya Okulov, Juergen Eckert, Chunlei Qiu
Summary: In this study, TiAl and Cr3C2 particles were added to a CrMnFeCoNi alloy to improve its processibility and mechanical properties. The addition of TiAl particles resulted in the formation of cracks, but the further addition of Cr3C2 particles helped suppress hot cracking. The presence of long-range ordered domains and precipitates contributed to the improved strength of the dual-particle containing alloy.
MATERIALS TODAY ADVANCES
(2023)
Article
Chemistry, Physical
Baran Sarac, Remzi Gurbuz, Matej Micusik, Maria Omastova, Amir Rezvan, Eray Yuece, Lixia Xi, Juergen Eckert, Ali Ozcan, A. Sezai Sarac
Summary: This study focuses on the synthesis and properties comparison of a novel organic composite nanofiber material consisting of styrene-butadiene-styrene (SBS) copolymer blended with polystyrene (PStyr) and carbon nanotubes (CNTs). The addition of CNTs retards the crystallization process and decreases the absorbance of both SBS/PStyr and PStyr/PBu in Fourier transform infrared spectroscopy. The interaction of CNTs with the blend is limited in samples with SBS, as observed in Raman spectroscopy.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
