Article
Chemistry, Physical
Peng Xue, Yongjiang Huang, Simon Pauly, Fangmin Guo, Yang Ren, Songshan Jiang, Feiya Guo, Shu Guo, Hongbo Fan, Zhiliang Ning, Jianfei Sun
Summary: In this study, in-situ high-energy X-ray diffraction and molecular dynamic simulation were used to investigate the structural evolution of CuZr-based bulk metallic glass composites during cryogenic treatment. The pre-strained sample underwent martensitic transformation and reverse martensitic transformation, which were influenced by environmental factors and stress. The results provide insights into the mechanism of martensitic transformation in the B2 CuZr phase and offer guidance for fine-tuning the structure and mechanical behaviors of these composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Songshan Jiang, Yongjiang Huang, Peng Xue, Fangmin Guo, Yang Ren, Jianfei Sun, Alfonso H. W. Ngan
Summary: The effect of cryogenic testing temperatures on the deformation behavior of a CuZr-based bulk metallic glass composite (BMGC) was investigated in this study, showing that the yield strength and work-hardenability increased from 298 K to 153 K. The higher yield strength at lower temperatures can be attributed to a larger difference in volume shrinkage between the crystalline phase and the amorphous matrix, while the increasing martensitic transformation degree of the crystalline phase at lower temperatures resulted in enhanced work-hardenability. These results contribute to a better understanding of the temperature dependence of phase-transformation induced plasticity in CuZr-based BMGCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Hangboce Yin, Jun-Qiang Wang, Yongjiang Huang, Hongxian Shen, Shu Guo, Hongbo Fan, Juntao Huo, Jianfei Sun
Summary: The new high-entropy metallic-glasses (HE-MGs) are designed using Dy and Ho instead of Gd in the Gd36Tb20Co20Al24 alloy based on the binary eutectic clusters method. The non-equiatomic RE36Tb20Co20Al24 (RE = Gd, Dy, or Ho) alloys show improved glass-forming ability compared to the equiatomic Gd25Tb25Co25Al25 alloy. The Ho36Tb20Co20Al24 alloy exhibits an extreme value of magnetic entropy change, indicating its potential for magnetocaloric applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Y. H. Meng, S. Y. Zhang, W. H. Zhou, J. H. Yao, S. N. Liu, S. Lan, Y. Li
Summary: Structural relaxation and subsequent rejuvenation through thermal treatment can improve the plasticity and fracture toughness of metallic glasses. The recovery of loosely packed regions in the atomic structure during annealing contributes to the observed rejuvenation. Tailoring the mechanical properties of metallic glasses can be achieved by controlling the annealing and thermal treatment conditions.
Article
Chemistry, Physical
Tianxu Zhao, Songshan Jiang, Qingxin Cui, Xianxue Zhang, Zhiliang Ning, Hongbo Fan, Jianfei Sun, Yongjiang Huang
Summary: In this study, the deformation behaviors of a Cu47.5Zr48Al4Nb0.5 bulk metallic glass composite (BMGC) in the temperature ranging from 663 K to 763 K have been investigated. The studied BMGC exhibits superplasticity within the supercooled liquid region (SLR) and the deformation involves both homogeneous and inhomogeneous modes. The temperature dependence of deformation behaviors in BMGCs was better understood through this study.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Xi Zhao, Si Lan, Lina Hu, Zhenduo Wu, Yaqiang Dong, Yang Ren, Xun-Li Wang
Summary: This study reveals the magnet-influenced beta relaxation in Fe-based metallic glasses and its interaction with magnetic ordering, and finds a two-stage relaxation behavior with the pinning effect of Curie temperature in the first stage and its disappearance in the second stage.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Z. Liu, P. Huang, F. Wang
Summary: This study found opposite changing trends of activation energies for beta relaxation and STZ in La60Ni25Al15 metallic glass before and after cryogenic thermal cycling treatment. Specifically, larger STZ requires higher W-STZ, while lower E-beta is needed to activate atoms involved in string-like motions. These results will deepen our understanding of the correlation between relaxation and deformation carriers in La-based metallic glasses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Stefan Michalik, Zuzana Molcanova, Michaela Sulikova, Katarina Kusnirova, Pal Jovari, Jacques Darpentigny, Karel Saksl
Summary: The Mg-Zn-Ca system was investigated for its glass-forming ability by fabricating ribbon specimens using melt-spinning technique with a concentration line of 7 at.% calcium. The samples were characterized to determine their mass density, hardness, elastic modulus, and crystallisation temperatures. Pair distribution functions obtained by HEXRD and ND measurements described the amorphous structure, revealing contributions of Mg-Mg, Mg-Zn, and Zn-Zn pairs. In situ HEXRD showed the transformation process from amorphous to crystalline structure for Mg60Zn33Ca7 and Mg50Zn43Ca7, proposing the formation of intermetallic compounds IM1 and IM3 as well as hcp-Mg phase in multiple crystallisation events.
Article
Materials Science, Ceramics
U. Hoppe, A. Ghosh, S. Feller, A. C. Hannon, D. A. Keen, J. Neuefeind
Summary: X-ray diffraction and neutron diffraction were used to study binary vanadate glasses containing MgO, Na2O, and K2O, with further analysis on glasses containing amorphous V2O5. The study showed that the glass structure widely excludes three-fold coordinated oxygen, with definite deformations of VO6 units and out-of-center displacements of V5+ ions attributed to second-order Jahn-Teller effects. The study also suggests that these mechanisms are effective in glass structures, with different V-O distances in the model allowing for consistent modeling of bond length distributions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Abbas Fadhil, Yu Su, Konstantin Glazyrin, Dawei Jiang, Xiaodong Wang, Qingping Cao, Dongxian Zhang, Chunxiao Gao, Jian-Zhong Jiang
Summary: The pressure-dependent atomic packing structure changes of newly designed sulfur-bearing metallic glass Pd37Ni37S26 have been investigated in this study, revealing local structural transformation and cluster transitions under different pressures. The results provide insights into the local structural evolution of sulfur-bearing metallic glasses under pressure.
Article
Chemistry, Multidisciplinary
Mihai Stoica, Baran Sarac, Florian Spieckermann, Jonathan Wright, Christoph Gammer, Junhee Han, Petre F. Gostin, Juergen Eckert, Joerg F. Loeffler
Summary: The study demonstrates that X-ray diffraction computed nanotomography can provide accurate details of the internal structure of metallic glasses, which is of great significance for the research of metallic materials at the nanoscale.
Article
Materials Science, Multidisciplinary
Yue Ren, Tingyi Yan, Zhuobin Huang, Qing Zhou, Ke Hua, Xiaolin Li, Yin Du, Qian Jia, Long Zhang, Haifeng Zhang, Haifeng Wang
Summary: This study demonstrates an improvement in wear resistance for a Ti-based bulk metallic glass composite at cryogenic temperatures. The wear resistance improvement is associated with the suppressed martensitic transformation and increased strength, making the material an excellent candidate for cryogenic wear applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, Yu. P. Ivanov, A. L. Greer
Summary: The crystallization behavior of a Cu58Y37Sc5 metallic glassy alloy was investigated using various methods. Differential scanning and isothermal calorimetries were performed to study the phase transformations. X-ray diffractometry studies showed the simultaneous formation of Cu2Y, CuY, and CuSc crystalline phases, indicating eutectic crystallization, while the isothermal crystallization kinetics corresponded to primary crystallization. Transmission electron microscopy observations revealed a complex crystallization process involving heterogeneous nucleation on pre-existing particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Tianding Xu, Xiao-Dong Wang, Eric M. Dufresne, Yang Ren, Qingping Cao, Dongxian Zhang, Jian-Zhong Jiang
Summary: Anomalous fast atomic dynamics were discovered in a metallic glass with good glass forming ability, mainly attributed to the increased mobility of Cu atoms by Ag addition, leading to the formation of structural heterogeneity at the atomic level.
MATERIALS TODAY PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Qing Du, Xiong-Jun Liu, Yihuan Cao, Qiaoshi Zeng, Hui Wang, Yuan Wu, Suihe Jiang, Xiaobin Zhang, Zhao-Ping Lu
Summary: In this study, the chemical dependence of thermally induced reentrant glass transition in (PdNi)(100-x)P-x MGs was systematically investigated. It was found that the reentrant glass transition in alloys with a P content of < 17 at% is suppressed with an increase in P. The composition dependence of the reentrant glass transition originates from the rearrangement of the metal-metalloid bond (i.e., Pd/Ni-P bonds) and the consequent short-range ordering to medium-range ordering.
SCIENCE CHINA-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.
Article
Chemistry, Multidisciplinary
Nikolas Kiraly, Dominika Capkova, Robert Gyepes, Nikola Vargova, Tomas Kazda, Jozef Bednarcik, Daria Yudina, Tomas Zelenka, Pavel Cudek, Vladimir Zelenak, Anshu Sharma, Vera Meynen, Virginie Hornebecq, Andrea Strakova Fedorkova, Miroslav Almasi
Summary: Two new alkaline earth metal-organic frameworks, UPJS-15 and UPJS-16, were synthesized and characterized. UPJS-15 exhibited one-dimensional channels with a size of approximately 11 x 10 angstrom(2) and showed high adsorption capacity for CO2. UPJS-16, on the other hand, did not show significant adsorption for the tested gases.
Editorial Material
Chemistry, Multidisciplinary
Juergen Eckert, Daniel Kiener
Article
Materials Science, Multidisciplinary
Maria Hagarova, Gabriela Baranova, Gustav Jablonsky, Branislav Bulko, Marek Vojtko, Vladimir Komanicky, Serhii Vorobiov, Jozef Bednarcik
Summary: This paper analyzes the oxidation behavior of MarBN steel exposed for 1000 hours at 600 and 650 degrees Celsius in a mixed atmosphere of air + 10% water vapor. The results show that different oxide layers were formed on the steel surface, including Fe2O3, Cr2O3, and (FeMnCr)2O4. The oxidation kinetics of the steel surface follows the parabolic law.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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
Crystallography
Gabriela Baranova, Maria Hagarova, Milos Matvija, David Csik, Vladimir Girman, Jozef Bednarcik, Pavel Bekec
Summary: This study reveals the formation of the oxide layer on the surface of 9CrNB steel in the presence of water vapor. The layer consists of hematite Fe2O3, Cr2O3, Fe3O4, and Fe3O4+(Fe,Cr)2O4, with nodules and pores formed during the oxidation process. Alloying elements like W, Co, Mn, and Si were found in increased concentrations, both in the oxide layer and at the steel-matrix-oxide interface. Long-term oxidation led to the formation of coarser carbides and finer MC particles, with Cr diffusion playing a role.
Article
Engineering, Manufacturing
Ruiqi Wang, Lixia Xi, Lili Feng, Baran Sarac, Konda Gokuldoss Prashanth, Juergen Eckert, Dongdong Gu
Summary: Dual-phase reinforcing approach is an efficient strategy for fabricating advanced aluminum matrix composites. However, designing a dual-phase reinforcing system with synergistic strengthening effect for LPBF process is challenging.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
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)
