Article
Nanoscience & Nanotechnology
Alireza Jalali, Mehdi Malekan, Eun Soo Park, Reza Rashidi, Ahmad Bahmani, Geun Hee Yoo
Summary: The compressive deformation behavior of Zr33Hf8Ti6Cu32Ni10Co5Al6 and Cu47Zr47Al6 alloys was studied at room temperature and high temperatures. The development of HEBMG improved ductility and fracture stress at room temperature. At high temperatures, HEBMG could withstand more stresses and had higher viscosity compared to BMG.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Multidisciplinary Sciences
Qi Zhu, Qishan Huang, Yanzhong Tian, Shuchun Zhao, Yingbin Chen, Guang Cao, Kexing Song, Yanjun Zhou, Wei Yang, Ze Zhang, Xianghai An, Haofei Zhou, Jiangwei Wang
Summary: This study investigates the intrinsic deformability of defective twin boundaries in metallic materials and finds that inherent kinks on twin boundaries can facilitate the formation of secondary and hierarchical nanotwins. This defect-driven hierarchical twinning propensity is critically dependent on the kink height and is generally applicable in various metals and alloys.
Article
Materials Science, Ceramics
H. D. Yang, L. B. Zhang, J. S. Zhang, H. H. Tang, S. H. Chen
Summary: Understanding the effects of cooling rate and sample size on the plastic deformation behavior of metallic glasses is crucial. This study found that increasing the cooling rate significantly enhances the plasticity of metallic glasses, while decreasing the sample size only moderately improves the plasticity. The cooling rate has a greater influence on the plastic deformation behavior than the size effect, and the size effect is also dependent on the cooling rate.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Youran Hong, Han Wang, Xing Li, Li Zhong, Hangman Chen, Ze Zhang, Penghui Cao, Robert O. Ritchie, Jiangwei Wang
Summary: Monatomic tantalum metallic glass nanowires, tailored by electropulsing, exhibit a wide range of deformability, either as liquid-like flow or brittle fracture. The plasticity and deformation transition of monatomic metallic glasses are dominated by inherent structural heterogeneity on the atomic level. The dispersive and sparse distribution of local order is associated with necking, while the percolation of medium-range order constrains the deformability and results in brittle failure. This work provides insights into the structure-property relationships in metallic glasses and has implications for the design of nanoscale metallic glasses with tunable mechanical properties.
Article
Engineering, Mechanical
Ming-fei Li, Yan-hua Zhou, Peng-wei Wang, Babafemi Malomo, Liang Yang
Summary: This study investigates the deformation behavior of Zr2Cu metallic glass at ambient and low temperature states by molecular dynamics simulations. The results show that the elastic-plastic properties of the material increase with decreasing temperature, leading to enhanced ductility. The formation of densely-packed structures at low temperatures contributes to the improved mechanical performance.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Engineering, Mechanical
Claire Griesbach, Jizhe Cai, Seog-Jin Jeon, Ramathasan Thevamaran
Summary: We demonstrate the ability to enhance the strength and toughness in metals by tailoring the plasticity mechanisms through impact-induced nanostructures. The gradient nanostructures exhibit heterogeneous deformation, leading to improved strength and toughness. The activation of different plasticity mechanisms depends on the specific impact-induced nanostructures.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
W. H. Zhou, N. T. Panagiotopoulos, A. L. Greer, Y. Li
Summary: A rejuvenated Zr-based bulk metallic glass was tested in tension and exhibited strain-hardening behavior. The plastic strain at failure reached 0.9%, which is considered high for metallic glasses. Comparisons with other alloys showed that the hardening rate of the metallic glass decreases rapidly with increasing strain, limiting its tensile plastic strain to approximately 1%. Rejuvenation delayed early catastrophic failure and resulted in changes in the fracture surface morphology.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Jan P. Liebig, Mirza Mackovic, Erdmann Spiecker, Mathias Goeken, Benoit Merle
Summary: The limited ductility of metallic thin films poses a challenge for MEMS and flexible electronics applications, but high ductility can be achieved through a combination of ultra-thin thickness and specific microstructure. The primary mechanisms of ductility are grain boundary sliding and grain boundary migration, which delay necking and achieve high ductility. This study opens promising prospects for developing ductile metallic films through microstructural engineering.
Article
Multidisciplinary Sciences
Jiri Orava, Shanoob Balachandran, Xiaoliang Han, Olga Shuleshova, Ebrahim Nurouzi, Ivan Soldatov, Steffen Oswald, Olof Gutowski, Oleh Ivashko, Ann-Christin Dippel, Martin Zimmermann, Yurii P. Ivanov, A. Lindsay Greer, Dierk Raabe, Michael Herbig, Ivan Kaban
Summary: The study used a combination of high-energy X-ray diffraction, containerless solidification during electromagnetic levitation, and transmission electron microscopy to investigate the phase evolution in a prototype Cu-Zr-Al glass during flash-annealing. Most of the phases formed during flash-annealing were found to be transient states, with only the B2 CuZr phase exhibiting equilibrium composition. Al-rich precipitates with a diameter of less than 10nm were also observed.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Long Zhang, Jinhao Zhang, Haibo Ke, Baoan Sun, Zhengwang Zhu, Yandong Wang, Hong Li, Aimin Wang, Haifeng Zhang
Summary: Two different bulk metallic glass composites with in-situ formed crystals show different performances at low temperatures, highlighting the significant influence of shape memory crystals on their low-temperature properties.
Review
Mechanics
Zhendong Sha, Yun Teng, Leong Hien Poh, Tiejun Wang, Huajian Gao
Summary: This review provides an overview of the deformation and failure mechanisms of metallic glasses, focusing on the control of shear bands to promote strength-ductility synergy. It also highlights emerging strategies to improve the ductility of metallic glasses, including postprocessing techniques and structural design based methods.
APPLIED MECHANICS REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Chenchen Yuan, Zhuwei Lv, Changmeng Pang, Xin Li, Rui Liu, Can Yang, Jiang Ma, Haibo Ke, Weihua Wang, Baolong Shen
Summary: This study investigated the plastic flow of metallic glass under ultrasonic vibration and found that ultrasonic vibration can improve the plastic deformation characteristics and enhance the activation energy for atomic diffusion. A more homogeneous plastic deformation was observed in the ultrasonic-vibrated sample, indicating improved mechanical properties.
SCIENCE CHINA-MATERIALS
(2021)
Article
Engineering, Mechanical
Huaping Ding, Pan Gong, Wen Chen, Zhen Peng, Hengtong Bu, Mao Zhang, Xuefeng Tang, Junsong Jin, Lei Deng, Guoqiang Xie, Xinyun Wang, Ke-fu Yao, Jan Schroers
Summary: Structural applications of metallic glasses are limited by their brittleness and strain-softening. However, this study shows that by applying electric currents, the structural fluctuations of metallic glasses can be enhanced, leading to improvements in strength, plasticity, and strain hardening capacity. This is achieved through the introduction of more soft zones surrounded by hard zones, which promotes the growth and interaction of shear bands. The mechanism behind the electric current-induced dynamic evolution of amorphous clusters is proposed to involve interatomic electrostatic forces and charge transfer.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Sinan Liu, Weixia Dong, Zhiqiang Ren, Jiacheng Ge, Shu Fu, Zhenduo Wu, Jing Wu, Yu Lou, Wentao Zhang, Huaican Chen, Wen Yin, Yang Ren, Joerg Neuefeind, Zesheng You, Ying Liu, Xun-Li Wang, Si Lan
Summary: The in-situ synchrotron high-energy X-ray study reveals that the canning-compressed BMG (CC-BMG) sample exhibits better tensile ductility and higher ultimate strength compared to the as-cast BMG sample. The CC-BMG undergoes two stages of plastic deformation, while the as-cast BMG only undergoes one stage. The structural crossover phenomenon occurs during the plastic deformation of CC-BMG.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jiaqian Xi, Fan Yang, Xiang Zhang, Haofei Zhou
Summary: Introducing crystalline dendrites can enhance the plasticity of metallic glass matrix composites. The geometry of the dendrites significantly influences the mechanical properties of the material.
MATERIALS TODAY COMMUNICATIONS
(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.
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
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)
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)
