Article
Materials Science, Multidisciplinary
Kai-Ming Han, Hui Jiang, Ying-Min Wang, Jian-Bing Qiang
Summary: The addition of Ti was found to significantly affect the glass-forming ability and mechanical properties of Zr63.5-xTixAl9Fe4.5Cu23 BMGs. Higher Ti content initially increased the GFA and room-temperature plasticity of the BMGs, but this trend reversed after reaching a certain threshold. The Zr60.5Ti3Al9Fe4.5Cu23 BMGs showed excellent biocompatibility, biocorrosion resistance, and potential for use in biomedical devices.
Article
Chemistry, Physical
Xiaojun Sun, Jie He, Dunbo Yu, Yang Luo, Zilong Wang, Yuanfei Yang
Summary: This work investigates the relationship between structural heterogeneity and serrated flow in nanoscale phase separated Zr-Cu-Fe-Al bulk metallic glasses with different plasticity. The results show that as the atomic ratio of Cu to Fe increases, serration dynamics transform from a chaotic state to a self-organized critical state. This transformation is attributed to the increase in structural heterogeneity, which promotes the formation of multiple shear bands.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Tao-Hsing Chen, Chi-Feng Lin, Jian-Yu Wang
Summary: In this study, the glass-forming ability, stress-strain relationships, and fracture characteristics of Zr60-xCu27Al8Fe5Nbx (x = 0, 1, 3 and 5 at%) bulk metallic glasses were investigated. The addition of Nb was found to increase the supercooled liquid region and parameter gamma of the BMGs. Fracture stress increased with increasing strain rate, while fracture strain decreased. The addition of 3 at% Nb resulted in the highest fracture stress and fracture strain.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
C. R. Onyeagba, M. Valashani, H. Wang, C. Brown, P. Yarlagadda, T. Tesfamichael
Summary: New functional coatings of thin film polymorphic metallic glasses (Ti-Fe-Cu, Zr-Fe-Al, and Zr-W-Cu) were deposited on SS316L and Ti substrates using co-sputtering technique. The films exhibited excellent surface and nanomechanical properties, making them potential functional surfaces for biomedical applications.
SURFACES AND INTERFACES
(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
Engineering, Mechanical
Qing Zhou, Weichao Han, Dawei Luo, Yin Du, Jiyang Xie, Xian-Zong Wang, Qiguang Zou, Xiaoxing Zhao, Haifeng Wang, Ben D. Beake
Summary: The addition of Fe to Zr-Cu-Ni-Al bulk metallic glasses (BMGs) leads to the formation of a second glassy phase, which enhances plasticity and wear resistance. This dual-phase structure promotes multiple shear bands, increased toughness, and oxidative wear, ultimately improving the overall wear performance of the BMGs.
Article
Chemistry, Physical
Zusheng Xiong, Pingjun Tao, Ziyun Long, Zhengyang Huang, Kunhui Long, Xuguang Zhu, Xi Xu, Huanhuan Deng, Haisheng Lin, Weiqiu Li
Summary: In this study, it was found that the mechanical properties of Zr-based alloys, especially the fracture strength, plasticity, indentation hardness, and elastic modulus, were improved by adding a small amount of Ta element.
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
Chemistry, Physical
Ning Luo, Florian Galgon, Sebastian Krauss, Luis A. Morales, Benoit Merle, Christopher H. Zenk, Carolin Koerner
Summary: In this study, Zr59.3Cu28.8Al10.4Nb1.5 bulk metallic glass composites were prepared using laser metal deposition technology, and the phase constitutions, thermal behavior, and microstructure evolution were examined. The correlation between microstructure and mechanical properties of the samples was investigated, enhancing our understanding of BMGCs fabricated in-situ by DED additive manufacturing.
Article
Materials Science, Multidisciplinary
Chenhe Wang, Nengbin Hua, Zhenlong Liao, Wei Yang, Shujie Pang, Peter K. Liaw, Tao Zhang
Summary: Ti47Cu38-xZr7.5Fe2.5Sn2Si1Ag2Pdx (x=1, 2, 3, and 4 atomic percent, at. pct) bulk metallic glasses with potential for biomedical applications were fabricated by copper-mold casting, exhibiting high glass-forming ability, relatively low Young's modulus, high compressive strength, and excellent biocompatibility. The addition of Pd improved plasticity and bio-corrosion resistance, making these BMGs promising as biomedical materials.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Ceramics
Mehdi Malekan, Reza Rashidi, Saeed G. Shabestari, Juergen Eckert
Summary: In this study, the effect of different yttrium doping levels on the glass-forming ability of copper-zirconium-aluminum-based metallic glasses was investigated from thermodynamic and kinetic perspectives. The amorphous structure of the alloys was confirmed using various techniques, and the correlation between the forming ability and thermodynamics/kinetics factors was established through the analysis of thermal characteristics. The results showed that 2% yttrium doping significantly improved the glass-forming ability of the metallic glasses. Yttrium enhances the forming ability by promoting a more densely packed atomic configuration and scavenging oxygen as an undesirable element.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Abhilash Gunti, Jayanta Das
Summary: A series of instrumented nanoindentation tests were conducted on Zr52.5Cu18Ni14.5Al10Ti5 and Zr58.5Cu15.6Ni12.8Al10.3Nb2.8 as-cast and cold rolled samples to investigate the indentation size effect in three perpendicular planes. The results showed that the hardness, reduced modulus, and dynamic hardness decreased with increasing indentation depth in the rolling-width, normal-rolling, and normal-width planes. The size effect was analyzed using various models, indicating that dynamic mechanical softening and friction between the indenter and specimen were the underlying reasons for the observed indentation size effect.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Shu Wen, Cuiying Dai, Weiguo Mao, Yang Zhao, Guofeng Han, Xiaoming Wang
Summary: The influences of Ag and Co additions on the thermal stability and glass-forming abilities of the alloys were systematically investigated. The mechanical performances were evaluated, and the plasticization mechanisms were discussed based on observations. The (Cu43Zr47Al7Ag3)(99.5)Co-0.5 bulk metallic glass exhibited excellent thermal stability and improved plasticity after compression tests.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Fuyu Dong, Yuexin Chu, Mengyuan He, Yue Zhang, Weidong Li, Peter K. Liaw, Binbin Wang, Liangshun Luo, Yanqing Su, Robert O. Ritchie, Xiaoguang Yuan
Summary: This study manipulated internal flow units in bulk-metallic glasses through plasma-assisted hydrogenation to improve plasticity and induce structural relaxation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
J. Ding, A. Inoue, S. L. Zhu, S. L. Wu, E. Shalaan, A. A. Al-Ghamdi
Summary: This study investigated the effects of increased aluminum content on the glass-forming ability, microstructure, phase stability, mechanical properties, and deformation behaviors of Zr-rich Zr-Cu-Al alloys in bulk metallic glass composites (BMGCs). It was found that higher aluminum content improved the glass-forming ability of the alloys, leading to the fabrication of BMGCs with enhanced performance. The Zr-rich Zr-Cu-Al BMGCs exhibited a large fracture strain and high fracture strength under compression, with superior plastic deformation capabilities attributed to factors such as the formation of shear bands and interactions between crystals and shear bands.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Jie Zhang, Xiaoyang Chen, MingJian Ding, Jiaqiang Chen, Ping Yu
Summary: This study enhances the compositional inhomogeneity of relaxor ferroelectric thin films to improve their dielectric temperature stability. The prepared films exhibit a relatively high dielectric constant and a very low variation ratio of dielectric constant over a wide temperature range.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Cheng Chen, Fanchao Meng, Jun Song
Summary: This study systematically investigated the unfaulting mechanism of single-layer interstitial dislocation loops in irradiated L12-Ni3Al. The unfaulting routes of the loops were uncovered and the symmetry breaking during the unfaulting processes was further elucidated. A continuum model was formulated to analyze the energetics of the loops and predict the unfaulting threshold.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Darshan Bamney, Laurent Capolungo
Summary: This work investigates the formation of adjoining twin pairs (ATPs) at grain boundaries (GBs) in hexagonal close-packed (hcp) metals, focusing on the co-nucleation (CN) of pairs of deformation twins. A continuum defect mechanics model is proposed to study the energetic feasibility of CN of ATPs resulting from GB dislocation dissociation. The model reveals that CN is preferred over the nucleation of a single twin variant for low misorientation angle GBs. Further analysis considering GB character and twin system alignment suggests that CN events could be responsible for ATP formation even at low m' values.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Amit Samanta, Prasanna Balaprakash, Sylvie Aubry, Brian K. Lin
Summary: This study proposes a combined large-scale first principles approach with machine learning and materials informatics to quickly explore the chemistry-composition space of advanced high strength steels (AHSS). The distribution of aluminum and manganese atoms in iron is systematically explored using first principles calculations to investigate low stacking fault energy configurations. The use of an automated machine learning tool, DeepHyper, speeds up the computational process. The study provides insights into the distribution of aluminum and manganese atoms in systems containing stacking faults and their effects on the equilibrium distribution.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Pengfei Yang, Qichang Li, Zhongying Wang, Yuxiao Gao, Wei Jin, Weiping Xiao, Lei Wang, Fusheng Liu, Zexing Wu
Summary: In this study, the HER performance of Ru-based catalysts is significantly improved through the dual-doping strategy. The obtained catalyst exhibits excellent performance in alkaline freshwater and alkaline seawater, and can be stably operated in a self-assembled overall water splitting electrolyzer.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ilias Bikmukhametov, Garritt J. Tucker, Gregory B. Thompson
Summary: Depositing a Ni-1at. % P film can facilitate the formation of multiple quintuple twin junctions, resulting in a five-fold twin structure and a pentagonal pyramid surface topology. The ability to control material structures offers opportunities for creating novel surface topologies, which can be used as arrays of field emitters or textured surfaces.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Zening Yang, Weiwei Sun, Zhengyu Sun, Mutian Zhang, Jin Yu, Yubin Wen
Summary: Multicomponent oxides (MCOs) have wide applications and accurately predicting their thermal expansion remains challenging. This study introduces an innovative attention-based deep learning model, which achieves improved performance by using two self-attention modules and demonstrates adaptability and interpretability.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ze Liu, Cai Chen, Yuanxun Zhou, Lanting Zhang, Hong Wang
Summary: This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Mike Schneider, Jean-Philippe Couzinie, Amin Shalabi, Farhad Ibrahimkhel, Alberto Ferrari, Fritz Koermann, Guillaume Laplanche
Summary: This work aims to predict the microstructure of recrystallized medium and high-entropy alloys, particularly the density and thickness of annealing twins. Through experiments and simulations, a database is provided for twin boundary engineering in alloy development. The results also support existing theories and empirical relationships.
SCRIPTA MATERIALIA
(2024)