Article
Chemistry, Physical
Wook Ha Ryu, Chae Woo Ryu, Min Kyung Kwak, Eun Soo Park
Summary: This study provides practical guidelines for tailoring the thermoplastic forming (TPF) process in bulk metallic glasses (BMGs) and investigates the influence of process variables. A continuous heating transformation (CHT) diagram was constructed for LM1b (Zr44Ti11Cu10Ni10Be25) using Flash-DSC measurement, and three TPF procedures from bulk to nano scales were demonstrated. A new TPF parameter, P, was proposed to compare the TPF ability of different BMGs. These results enable the selection of suitable BMGs and optimization of TPF processes, leading to improved performance and expanded applications in various industries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Yongping Kang, Yupeng Wu, Yangyang Pan, Qi Peng, Ze Liu
Summary: This paper investigates the mold filling dynamics of BMGs in the supercooled liquid region through finite element simulations and experiments. The phase diagram predicting the reliable replication range of mold geometric parameters is determined. It is found that improperly designed molds can lead to complex filling dynamics and replication failure. This study provides new insights into the mold filling dynamics of highly viscous fluids and offers a guideline for thermoplastic molding of BMGs.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Wook Ha Ryu, Kyung Jun Kim, Min Kyung Kwak, Chae Woo Ryu, Eun Soo Park
Summary: This research provides a practical guideline to significantly reduce production costs of metallic glasses (MGs) through tailored alloy design and precise control of thermoplastic forming (TPF) process parameters. It is discovered that commercially available MGs with a low glass transition temperature (Tg) can be developed in the Zr-rich alloy systems. Moreover, the challenge of maintaining a wide TPF window in Be-free Zr-based MGs while keeping Tg low has been addressed.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Shweta Jagdale, Akib Jabed, Sumanth Theeda, Chandra Sekhar Meduri, Zhonglue Hu, Molla Hasan, Golden Kumar
Summary: This study summarizes recent advancements in the thermoplastic drawing of bulk metallic glasses. By combining drawing with templated embossing, arrays of high-aspect-ratio nanostructures can be fabricated, which was not possible with previous drawing methods limited to single fibers. Two-step drawing allows the production of challenging metallic glass structures such as vertically aligned nanowires, nanoscale tensile specimens, hollow microneedles, helical shafts, and micro-yarns, which are difficult to fabricate using other thermoplastic forming techniques. These geometries have the potential for new applications in sensors, optical absorption, transdermal drug delivery, and high-throughput characterization. The review focuses on the development of experimental setups, quantitative descriptions of the drawing process, and the versatility of the drawing methodology.
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
Yeong-Seong Kim, Woo-Chul Kim, Won-Tae Kim, Do-Hyang Kim
Summary: The addition of Sn has significantly improved the thermoplastic forming ability of Ti-Zr-Ni-Cu metallic glass, leading to changes in crystallization behavior and smaller grain size, indicating enhanced thermal stability.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Liliang Shao, Lin Xue, Qianqian Wang, Kaili Ma, Jindu Huang, Baolong Shen
Summary: In this study, the glass-forming ability of DyCoAl bulk metallic glass was improved by microalloying with Si element. The addition of Si affected the crystallization behavior of the BMG, changing the nucleation process and the growth rate of crystalline particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Wei Guo, Mingzi Wang, Zhenhua Qin, Xu Shen, Shulin Lu, Xiaohua Chen, Shusen Wu
Summary: The doping of Ta in TiCu-Ni-Zr bulk metallic glass composite improves glass-forming ability and mechanical properties, resulting in a homogeneously distributed spherical B2 phase with enhanced plasticity.
JOURNAL OF ALLOYS AND COMPOUNDS
(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
Materials Science, Multidisciplinary
Maximilian Frey, Jan Wegner, Nico Neuber, Benedikt Reiplinger, Benedikt Bochtler, Bastian Adam, Lucas Ruschel, Sascha Sebastian Riegler, Hao-Ran Jiang, Stefan Kleszczynski, Gerd Witt, Ralf Busch
Summary: The additive manufacturing of bulk metallic glasses through laser powder bed fusion has attracted increasing interest, especially for industry-relevant alloys based on iron or zirconium. Although the achievable surface qualities are limited, applying thermoplastic forming on LPBF-formed parts can help decrease surface roughness and imprint finely structured surface patterns for various applications.
MATERIALS & DESIGN
(2021)
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
Materials Science, Multidisciplinary
Sirui Cheng, Jiang Ma, Feng Gong, Jun Shen
Summary: In this study, a Zr-based bulk metallic glass material with good thermoplastic formability was developed through alloying, enabling the fabrication of nanostructures with retained amorphous characteristics. The enhanced hydrophilicity of the embossed surface was attributed to a large roughness coefficient induced by the capillary effect, providing a low-cost and environmentally friendly system for manufacturing nanostructures with broad prospects in the field of electrocatalysis.
Article
Materials Science, Ceramics
Y. Tan, Y. W. Wang, X. W. Cheng, Q. Fu, Z. H. Xin, Z. Q. Xu, H. W. Cheng
Summary: The study found that appropriate Al substitution can improve the glass-forming ability, strength, and plasticity of amorphous alloys, but fracture strength decreases and no dynamic compression plasticity is observed during dynamic loading.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Mehdi Malekan, Reza Rashidi, Mansoor Bozorg, Nick Birbilis
Summary: The effect of yttrium (Y) on the glass-forming ability (GFA), mechanical properties and corrosion of (Cu50Z-r43Al7)100-xYx alloys was studied. The addition of Y improved the GFA of Cu50Zr43Al7 alloy, with a GFA of 15 mm obtained for (Cu50Zr43Al7)98Y2. The bulk metallic glasses (BMGs) exhibited limited plastic strain but achieved high compressive fracture strength and Young's modulus. The corrosion resistance of the BMGs was improved by the addition of Y.
Article
Materials Science, Ceramics
Ting Zhang, Zhilin Long, Li Peng, Zhuang Li
Summary: In this paper, a convolutional neural network (CNN) model was used to investigate the glass forming ability (GFA) of bulk metallic glasses (BMGs). By training and testing with a large number of alloy compositions, the study shows that machine learning methods have great potential in guiding the design of new BMG materials.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
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)