Article
Materials Science, Multidisciplinary
Xiangkui Liu, Jian Kong, Xinxiang Song, Shuai Feng, Qipeng Wang, Yang Yang, Tianchi Wang
Summary: The size dependence of ductile to brittle transition in Zr-based metallic glasses was investigated through small punch test, revealing a significant difference in behavior between thin and thick samples. Two critical deformation factors, alpha(c1) and alpha(c2), were identified at sample thicknesses of 200 and 500 mm, triggering the initiation of circumferential and radial shear bands respectively. The interaction of multiple shear bands significantly enhances the ductility of samples with alpha >= alpha(c1).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
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
Engineering, Mechanical
Milad Ghaemi, Mehdi Jafary-Zadeh, Khoong Hong Khoo, Huajian Gao
Summary: Chemical short-range order (CSRO) is an important index for material properties of multicomponent metallic alloys and glasses. Molecular dynamics simulations show that the fracture mode of a metallic glass can be altered from crack propagation to shear banding by tuning CSRO.
EXTREME MECHANICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
K. W. Shao, W. H. Zhou, K. Gao, X. G. Zhu, P. Jia, Y. Li
Summary: Catastrophic brittle failure limits the application of bulk metallic glasses (BMGs), but the brittle La69Co17Al14 BMG shows significant compressive plasticity when compressed under constrained conditions. This study systematically investigates the compressive plasticity of the BMG by decreasing the aspect ratio, and finds that the brittle-ductile transition occurs at an aspect ratio of 0.36. Furthermore, as the plasticity increases, the hardness initially decreases and then increases, while the relaxation enthalpy of the BMG's structure monotonically increases.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
W. H. Zhou, F. H. Duan, Y. H. Meng, C. C. Zheng, H. M. Chen, A. G. Huang, Y. X. Wang, Y. Li
Summary: The study systematically investigated the evolution of microstructure and mechanical properties of Zr-based bulk metallic glasses with varying oxygen content. Results showed that with increasing oxygen content, compressive plasticity decreased slightly before plunging drastically, revealing a threshold oxygen content level for ductile-brittle transition at 3500 at. ppm. The embrittlement at high oxygen content was closely related to changes in microstructure.
Article
Nanoscience & Nanotechnology
Limin Lai, Tianhao Liu, Xinghong Cai, Min Wang, Shengbiao Zhang, Wen Chen, Shengfeng Guo
Summary: The study introduces a series of low-cost refractory Mo-Co-B BMGs with enhanced GFA and high thermal stability, exhibiting exceptional hardness and Young's modulus.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
X. Yuan, D. Sopu, J. Eckert
Summary: The local stress state in metallic glasses can be modulated without affecting their structure, leading to enhanced ductility and strain hardening during loading. The stress heterogeneity in metallic glasses results in shear band multiplication, ultimately enhancing their macroscopic ductility. Additionally, residual compressive stress significantly increases the strength of the glass and contributes to observed strain hardening.
Article
Physics, Fluids & Plasmas
J. S. Langer
Summary: This paper attempts to construct a first-principles theory of the fracture toughness of crystalline solids based on the thermodynamic dislocation theory. The analysis results show that the theory's predictions quantitatively agree with experimental data, including both brittle and ductile fracture under various conditions.
Article
Multidisciplinary Sciences
Alexander Firlus, Mihai Stoica, Stefan Michalik, Robin E. Schaeublin, Joerg F. Loeffler
Summary: The Invar effect in Fe-based bulk metallic glasses is widely observed, but its manifestation at the atomic scale is not well understood. In this study, in-situ X-ray diffraction was used to investigate the structural transformations of two bulk metallic glasses, revealing that the Invar effect is consistent with macroscopic thermal expansion and correlated with Fe-Fe pair distance.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Alan A. Long, Wendelin J. Wright, Xiaojun Gu, Anna Thackray, Mayisha Nakib, Jonathan T. Uhl, Karin A. Dahmen
Summary: Recent research shows that large shear bands in bulk metallic glasses nucleate in a manner similar to cracks. When small slips reach a nucleation size, the shear band rapidly grows to span the entire sample. Smaller nucleation sizes imply lower ductility. Ductility can be increased by increasing the nucleation size relative to the maximum shear band size.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Bolin Yang, Bo Song, Cun Zhang, Shaohua Chen
Summary: This study systematically investigates the tensile mechanical properties of a one-dimensional carbon nanomaterial and reveals a brittle-ductile transition at different temperatures. The results show that the microstructures play a crucial role in the plastic behavior of the material, and the introduction of interlayer bonds can improve its ductility.
Article
Engineering, Multidisciplinary
Richard M. Christensen
Summary: The transition from ductile to brittle behavior is determined to occur at specific values of certain material properties, with a strong relationship found with the elements of the Periodic Table, particularly iron. These findings extend beyond elemental materials and have significant implications for understanding the elastic and failure properties of materials. These developments build upon previous empirical observations from Pugh [7] and provide a broader insight into material behavior.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Meng Gao, Celal Kursun, John H. Perepezko
Summary: In this work, a new studying strategy based on nanoidentation was applied to investigate the evolution of thermodynamic properties, macroscopic mechanical behavior, and shear band nucleation kinetics at a sub-glass transition temperature. The results showed that the ductile to brittle transition induced by structural relaxation is a comprehensive result of the transition of shear band nucleation mode, nucleation site density, and nucleation rate. These findings provide new insights into the effect of structural relaxation on shear band nucleation and macroscopic deformation behaviors, and the development of improved metallic glasses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Nicolas Amigo, Simon Palominos, Felipe J. Valencia
Summary: This study employed machine learning models to predict the plastic properties in CuZr metallic glasses. Molecular dynamics simulations were conducted for 100 different samples, and statistical analysis was performed on 17 materials properties. Strong correlations were found between stoichiometry, temperature, structural, and elastic properties with plastic properties. Three regression models were used for prediction, and linear and Ridge regressions showed better performance with coefficients of determination above 80% for three plastic properties. Lasso regression had lower performance with coefficients of determination above 60% for two plastic properties. Overall, this work demonstrates that molecular dynamics simulations combined with machine learning models can provide a framework for predicting the plastic behavior of complex materials.
SCIENTIFIC REPORTS
(2023)
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
Chemistry, Multidisciplinary
Tian Wang, Guo-Xi Ren, He-Yi Xia, Zulipiya Shadike, Tao-Qing Huang, Xun-Lu Li, Si-Yu Yang, Ming-Wei Chen, Pan Liu, Shang-Peng Gao, Xiao-Song Liu, Zheng-Wen Fu
Summary: This study demonstrates the realization of additional capacity and highly reversible anionic redox process in the NaCr1-yVyS2 system by regulating the metal-ligand energy level. In situ X-ray absorption near edge structure (XANES) observation shows simultaneous cationic and anionic redox of Cr/V and S, with strong covalent interaction stabilizing the holes on the anions. This work provides insight into highly reversible anionic redox in layered compounds and showcases the feasibility of anionic redox chemistry based on hybridized bands with d-p covalence.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Jiuhui Han, Isaac Johnson, Mingwei Chen
Summary: This article reviews the recent progress in the fabrication and application of 3D porous graphene with designable microstructures, chemistries, and properties for energy storage and conversion. The 3D graphene, synthesized through template-based and template-free methods, retains the highly conductive and mechanically robust properties of 2D graphene while offering new functionalities and opportunities.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Libo Fu, Deli Kong, Chengpeng Yang, Jiao Teng, Yan Lu, Yizhong Guo, Guo Yang, Xin Yan, Pan Liu, Mingwei Chen, Ze Zhang, Lihua Wang, Xiaodong Han
Summary: This study demonstrates that ultra-small nanocrystalline gold nanowires with grains in both the Hall-Petch and inverse Hall-Petch grain-size regions exhibit high strength and superplasticity at room temperature. The plastic deformation occurs in two stages, involving intergrain plasticity and intragrain plasticity.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Shuangxi Song, Fan Zhu, Mingwei Chen
Summary: This study demonstrates the liquid nature of hard glasses through broadband stress relaxation experiments. The rheology and dynamic transition of different glass systems can be unified by a universal scaling law in the time-stress-temperature-volume domain. The dynamic response of metallic glasses and other glasses follows a universal scaling law within the framework of fluid dynamics.
Article
Engineering, Mechanical
Zhifu Zhang, Chenyang Wang, Pan Liu, Kolan Madhav Reddy, Xiaodong Wang, Mingwei Chen, Shuangxi Song
Summary: The mechanical properties and plastic deformation of a Cu(55.4)Zr(35.2)Al(7.5)Y(1.9) nanoporous metallic glass (MG) were studied. It was found that the nanoporous MG is brittle in tension and has significant homogeneous plasticity under compression. The study clarifies the fundamental failure mechanism and deformation behavior in nanoporous MGs.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Multidisciplinary Sciences
Lihua Wang, Yin Zhang, Zhi Zeng, Hao Zhou, Jian He, Pan Liu, Mingwei Chen, Jian Han, David J. Srolovitz, Jiao Teng, Yizhong Guo, Guo Yang, Deli Kong, En Ma, Yongli Hu, Baocai Yin, XiaoXu Huang, Ze Zhang, Ting Zhu, Xiaodong Han
Summary: Grain boundaries (GBs) are crucial for the mechanical behavior of polycrystalline materials, yet the atomic-scale dynamic processes of GB deformation remain unclear. This study presents an in situ atomic-resolution investigation on how sliding-dominant deformation occurs at general tilt GBs in platinum bicrystals, involving direct atomic-scale sliding and sliding with atom transfer across the boundary plane.
Article
Chemistry, Multidisciplinary
Yuto Katsuyama, Akira Kudo, Hiroaki Kobayashi, Jiuhui Han, Chen Mingwei, Itaru Honma, Richard B. Kaner
Summary: This study demonstrates the use of inexpensive 3D printers to fabricate high-energy-density sodium-ion batteries with hard carbon microstructure electrodes. Periodic carbon microstructures with enhanced ion transport capabilities were created, achieving higher areal capacity compared to conventional monolithic electrodes. The use of binder-free pure-carbon microstructure elements allowed for tracking of structural changes and improved understanding of ion intercalation mechanisms in hard carbon.
Article
Multidisciplinary Sciences
Shufen Chu, Pan Liu, Yin Zhang, Xiaodong Wang, Shuangxi Song, Ting Zhu, Ze Zhang, Xiaodong Han, Baode Sun, Mingwei Chen
Summary: In this study, the authors report real-time atomic-scale observations of grain boundary dislocation climb in nanostructured gold at room temperature. The climb of a dislocation is found to occur through stress-induced reconstruction of neighboring atomic columns. The proposed atomic route of dislocation climb is energetically favorable, as demonstrated by Monte Carlo simulations. The in situ observations also reveal the significance of grain boundary dislocation climb in controlling the microstructures and properties of nanostructured metals.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Qinqin Wei, Xiandong Xu, Qiang Shen, Guoqiang Luo, Jian Zhang, Jia Li, Qihong Fang, Chain-Tsuan Liu, Mingwei Chen, Tai-Gang Nieh, Jianghua Chen
Summary: This study reports a strategy to achieve exceptional high-temperature microstructural stability and strength by introducing eutectic carbide in a refractory multiprincipal-element alloy (MPEA). The eutectic MPEA has outstanding high-temperature strength and alleviates room-temperature brittleness through microcrack tip blunting. This offers a new paradigm for the design of next-generation high-temperature materials.
Article
Multidisciplinary Sciences
Ruirui Song, Jiuhui Han, Masayuki Okugawa, Rodion Belosludov, Takeshi Wada, Jing Jiang, Daixiu Wei, Akira Kudo, Yuan Tian, Mingwei Chen, Hidemi Kato
Summary: This study presents the fabrication of nanoporous intermetallic catalysts via liquid metal dealloying, which exhibit high electrocatalytic activity and durability in hydrogen production. The research sheds light on the intermetallic effect in dealloying, providing new insights for the development of advanced intermetallic catalysts for energy applications.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Qiwen Zhang, Yixuan Hu, Haofei Wu, Xiaoran Zhao, Mingliang Wang, Sihong Wang, Ruohan Feng, Qing Chen, Fang Song, Mingwei Chen, Pan Liu
Summary: The article reports on a eutectic dealloying strategy to activate porous spinel NiFe2O4 nanowires with multivalent cation substitutions. The obtained NiFeXO4 exhibits superior electrocatalytic performance for the oxygen evolution reaction, delivering a benchmark current density and high stability. This is attributed to lattice distortion and electronic coupling, as well as the absorption of H2O molecules facilitated by the multication substitution strategy.
Article
Materials Science, Multidisciplinary
Yidi Shen, Kolan Madhav Reddy, Jun Li, Mingwei Chen, Qi An
Summary: We investigated the deformation mechanisms in superhard boron carbide (B4C) using a combination of molecular dynamics simulations and transmission electron microscopy experiments. Interestingly, we observed an anomalous quasi-plastic deformation in B4C under ideal shear deformation along the (111)[112] slip system. This behavior can be attributed to the formation and propagation of slip bands, which are stabilized by newly formed bonding during deformation. On the other hand, the dislocation-like mechanism mediated amorphization was observed in B4C under shear deformation along other slip systems.
Article
Materials Science, Multidisciplinary
Christopher Florencio Aleman, Jiecheng Lyu, Mehmet A. Noyan, Kathleen M. McCreary, Jiuhui Han, Isaac Johnson, Qingyang Gao, Maximilian Niebur, Berend T. Jonker, Mingwei Chen
Summary: A three-dimensional nanoarchitectured hexagonal boron nitride (hBN) is developed with integrated single photon emitters (SPEs) generated from native defects. The structure consists of a continuous 2D hBN sheet with built-in convex and concave curvatures, promoting the formation of optically active and thermally stable defects. The 3D hBN eliminates substrate disturbance and minimizes lattice strain heterogeneity, resulting in narrow spectral distribution of SPEs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mengjia Wang, Ruichun Luo, Yuxin Liu, Xiaoran Zhao, Xiaodong Zhuang, Wen Wu Xu, Mingwei Chen, Pan Liu
Summary: The interface engineering of 2D transition metal dichalcogenides (2D-TMDs) and metals is an efficient method to adjust their electrical and optoelectronic properties. In this study, a 2D non-van der Waals (vdW) Mo-rich phase was discovered during the growth of molybdenum disulfide (MoS2) from a Mo-Au surface alloy in a S-poor environment. This Mo-rich phase preferentially nucleates between the outermost 2D MoS2 and a 3D nanostructured Au substrate, leading to a n-type contact interface with an ultralow transition energy barrier height.
Article
Chemistry, Multidisciplinary
Isaac Johnson, Jiuhui Han, Mingwei Chen
Summary: This article provides an overview and analysis of recent research on single-atom electrocatalysts based on 3D nanoporous graphene for energy conversion and storage applications, highlighting the advancements in solving the challenges of developing these catalysts.
ACCOUNTS OF MATERIALS RESEARCH
(2022)
