Review
Materials Science, Multidisciplinary
Cheng Zhang, Di Ouyang, Simon Pauly, Lin Liu
Summary: Bulk metallic glasses (BMGs) as metallic materials without long-range order have attracted significant attention from academia and industry in the past three decades. The emerging 3D printing technology provides a viable route to overcome the challenges inherent in conventional processing routes and expand the applications of BMGs.
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Baoshuang Shang, Weihua Wang, Pengfei Guan
Summary: This study explores the polarized plastic response of metallic glasses induced by asymmetric mechanical cycling. The results show that the amplitude of mechanical cycling can control the anelastic limit, and the plastic rearrangements exhaust while the anelastic rearrangements govern the anisotropy. The polarized plastic response is originated from the asymmetry of the local potential energy surface.
Article
Engineering, Mechanical
K. Tao, J. C. Qiao, L. Zhang, J. M. Pelletier
Summary: The introduction of Dy element in metallic glasses increases atomic mobility and structural heterogeneity, impacting the dynamic relaxation behavior and mechanical properties. Time-temperature superposition principle, Kohlrausch-Williams-Watts (KWW) function, and quasi-point defects (QPD) theory were used to describe the behavior of metallic glasses. These investigations demonstrate the importance of structure heterogeneity in tailoring the properties of metallic glasses.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Weiping Zeng, Yanhua Chen, Qiang Li, He Li, Baoxia Mu, Jiankang Ye, Chuntao Chang
Summary: The effects of Co content on the properties of Ni-based bulk metallic glasses were systematically investigated. It was found that increasing Co content improves glass forming ability, plastic strain, and corrosion resistance. These Ni-based bulk metallic glasses have excellent comprehensive performance and great potential for industrial applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
A. H. Cai, G. Zhou, P. W. Li, D. W. Ding, Q. An, G. J. Zhou, Q. Yang, Y. P. Lin, H. Mao
Summary: The relationship between microstructure and mechanical property of three Zr-based bulk metallic glasses (BMGs) was investigated. The results show that the content of CuZr2-type phase increases but that of Zr6Al2Ni-type phase decreases with increasing Zr content. The plastic flow stress and strain decrease while the plasticity increases with increasing fraction of CuZr2-type cluster, which is named as geometrically unfavorable motifs (GUMs). The fitting parameters from cumulative probability statistics provide valuable clues for investigating the plastic flow and plasticity of the BMGs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Keita Nomoto, Anna Ceguerra, Christoph Gammer, Bosong Li, Huma Bilal, Anton Hohenwarter, Bernd Gludovatz, Jurgen Eckert, Simon P. Ringer, Jamie J. Kruzic
Summary: The study revealed the hierarchical structure of BMGs through nanobeam electron diffraction experiments, showing that the local hardness of microscale domains decreases with the size and volume fraction of atomic clusters with higher local MRO. A model of ductile phase softening was proposed to enable the design of BMGs in the future by tuning the MRO size and distribution in the nanostructure.
Article
Materials Science, Ceramics
M. S. Z. Zhao, Z. L. Long, L. Peng
Summary: Nanoindentation tests were conducted on different bulk metallic glasses to determine their strain rate sensitivities of hardness, which were found to be negative. The variations in strain rate sensitivity values along with different factors were observed and discussed to understand the reasons for this negative strain rate sensitivity and its dependence on the composition and other factors of metallic glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Kaiming Han, Hui Jiang, Yingmin Wang, Jianbing Qiang, Changyang Yu
Summary: Bulk metallic glasses of Zr58.6Al15.4(Co1-xCux)26 were designed and produced by copper mold casting, with the partially substituted Zr58.6Al15.4Co18.2Cu7.8 BMG showing the largest glass formation ability and excellent properties, making it a potential biomedical material.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Nanoscience & Nanotechnology
Tianhao Liu, Limin Lai, Siming Xiao, Meifang Tang, Hongju Zhang, Shengfeng Guo
Summary: In this study, a new ternary system of Fe-W-B BMGs with ultrahigh thermal stabilities and hardness was successfully developed, showing promising applications in extreme service environment. The thermal properties and simple chemical components of Fe-W-B BMGs make them model materials for understanding the glass formation mechanism of Fe-based BMGs.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Multidisciplinary Sciences
Yuan Wu, Di Cao, Yilin Yao, Guosheng Zhang, Jinyue Wang, Leqing Liu, Fengshou Li, Huiyang Fan, Xiongjun Liu, Hui Wang, Xianzhen Wang, Huihui Zhu, Suihe Jiang, Paraskevas Kontis, Dierk Raabe, Baptiste Gault, Zhaoping Lu
Summary: By introducing dense local packing regions in BMGs, enhancing structural fluctuations has led to a simultaneous increase in ductility and strength.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Weiming Yang, Xinfa Sun, Haishun Liu, Changfeng Yu, Wenyu Li, Akihisa Inoue, Daniel Sopu, Jurgen Eckert, Chunguang Tang
Summary: This study reveals a universal dependence of mechanical properties on simple structural parameters for metallic glasses, providing insights into the fundamentals of the mechanical properties of disordered systems.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Weijian Zhang, Pingjun Tao, Yugan Chen, Junfeng Si, Ziyun Long, Shengkai Huang, Huajie He, Zhenghua Huang, Yuanzheng Yang
Summary: The microstructure, thermomechanical properties, and high temperature plastic deformation behavior of Zr55.7Cu22.4Al14.7Ni7.2 alloy rods were investigated. The alloy showed non-Newtonian fluid properties under low temperature-high strain rate conditions, while it exhibited the deformation behavior of a Newtonian fluid under high temperature-medium to high strain rate conditions. The alloy crystallized after deformation at high temperature and low strain rate, while maintaining an amorphous structure in the low and medium temperature region. High temperature deformation also affected the Vickers microhardness of the metallic glass.
Article
Chemistry, Physical
Guoxiang Shen, Weizhi Li, Zhichao Ma, Shengteng Zhao, Dongni Liu, Hongwei Zhao, Luquan Ren
Summary: This study investigates the depth-dependent mechanical properties of Zr-based bulk metallic glasses using the depth-sensitive nanoindentation technique. The results show that the surface hardness and elastic modulus increase, while fracture toughness decreases with decreasing indentation depth. This mechanical size effect is closely related to the evolution of shear bands at different depths.
Article
Nanoscience & Nanotechnology
Jiazi Bi, Xinquan Wei, Xiaobin Liu, Ran Li, Ruijuan Xiao, Tao Zhang
Summary: A family of novel Os-Co-Ta-B high-temperature bulk metallic glasses (HTBMGs) with high glass transition temperature, Vickers microhardness, and compressive strength was fabricated by introducing high-modulus refractory metal Os and strong-covalent metalloid B. The impressive strength is attributed to the strong bond characteristics especially for Ta-Os and B-B bonds. The castable OsCo-based HTBMGs with superior mechanical properties and high thermal stabilities are significant for high-temperature applications as advanced structural materials.
SCRIPTA MATERIALIA
(2023)
Article
Metallurgy & Metallurgical Engineering
Li Ning, Huang Xin
Summary: The application of bulk metallic glasses faces challenges due to room temperature brittleness and manufacturing bottlenecks. 3D printing technology is becoming a key method to solve these difficulties, but the basic theories are completely different from those of crystalline materials, making in-depth analysis crucial for the development of BMG 3D printing technology.
ACTA METALLURGICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Yurii P. Ivanov, Baran Sarac, Sergey Ketov, Jurgen Eckert, A. Lindsay Greer
Summary: In the search for rare-earth-free alternatives, successful high-temperature synthesis of tetragonal tetrataenite Fe-Ni alloy has been achieved. Compared to the ultra-slow cooling formation in meteorites, this material can be rapidly prepared using industrially practicable high cooling rates.
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, Physical
N. Z. Zhang, K. Sun, D. Sopu, F. Spieckermann, X. D. Ma, C. Geng, X. L. Bian, Y. D. Jia, Q. Wang, G. Wang, J. Eckert
Summary: The enhancement of plasticity in metallic glasses can be achieved by synthesizing composites with crystalline phases. In this study, the evolution of crystallization and the correlation between void-like defects and crystallization in cryogenically-treated metallic glasses were investigated. It was found that cryogenic treatment promotes crystallization and reduces the concentration of nanoscale defects. The findings have important implications for designing metallic glass composites with controlled length scales and distribution of crystalline inclusions.
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
Chemistry, Physical
Lixia Xi, Lili Feng, Dongdong Gu, Konda Gokuldoss Prashanth, Ivan Kaban, Ruiqi Wang, Ke Xiong, Baran Sarac, Juergen Eckert
Summary: In this study, aluminum-based composites with different percentages of (ZrC+TiC) ceramic reinforcements were manufactured using laser powder bed fusion (LPBF) additive manufacturing. The influence of hybrid ceramic content on laser absorption behavior, micro-nanoscale reinforcing phase formation, and mechanical performance of the composites was investigated. Increasing the hybrid ceramic content from 10% to 20% enhanced the laser absorption behavior and increased the fraction of nanoparticles. The composites with 20% ceramic content exhibited a micro/nano hardness of 120 HV0.2 and 1.33 GPa, respectively. The composites with 15% (ZrC+TiC)/Al showed a higher elastic modulus of -94.4 GPa and tensile strength of -280 MPa compared to the unreinforced Al matrix, attributed to the formation of nano-precipitates and coherent bonding at the reinforcement/matrix interfaces.
JOURNAL OF ALLOYS AND COMPOUNDS
(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
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
Yun-Li Li, Wen-Ping Wu, Daniel Sopu, Juergen Eckert
Summary: This paper investigates the fracture and plastic deformation of Cu/Cu64Zr36 crystalline/amorphous composites with different void locations and shapes through molecular dynamics simulations. The results show that changes in void location and shape significantly influence dislocation motion, shear transformation zones (STZs) activation, shear band propagation, and fracture strength of the composites. The findings provide important insights for understanding and improving the plastic and fracture behaviors of composites by altering void location and shape from an atomistic perspective.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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)
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)
Article
Chemistry, Physical
Ekrem Kaplan, Tolga Karazehir, Selin Gumrukcu, Baran Sarac, A. Sezai Sarac, Esin Hamuryudan
Summary: In this study, nanohybrid electrocatalyst materials based on carboxylic acid substituted copper phthalocyanines (CuPcs) and reduced graphene oxide (rGO) were investigated for their electrocatalytic activity in the hydrogen evolution reaction (HER). The electrodes with peripherally substituted rGO/CuPc showed higher efficiency and activity compared to the non-peripherally substituted ones. The enhanced performance of the peripherally carboxylic substituted rGO/CuPc electrodes was attributed to the improved conductivity and electron transfer kinetics.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)