Article
Nanoscience & Nanotechnology
L. T. Zhang, Y. J. Wang, E. Pineda, H. Kato, Y. Yang, J. C. Qiao
Summary: The study found that high-entropy metallic glasses have a relatively homogeneous structure, smaller activation volumes, and sluggish free volume evolution during high-temperature deformation. Spectrum analysis can help delineate the deformation details of high-entropy metallic glasses. This core finding sheds light on the structural heterogeneity and sluggish dynamics, providing an essential piece for understanding the deformation mechanism of high-entropy metallic glasses.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Lin Xue, Liliang Shao, Zongzhen Li, Zhida Han, Baosen Zhang, Juntao Huo, Xinming Wang, Shuaishuai Zhu, Bin Qian, Jiangbo Cheng, Baolong Shen
Summary: In this study, the magnetic behavior and magnetocaloric effect of high-entropy and medium-entropy bulk metallic glasses (BMGs) were systematically investigated. The results showed spin glass-like behavior and large magnetocaloric effect at cryogenic temperatures in all BMGs. The influence of configuration entropy on magnetic response and magnetocaloric effect was discussed. It was found that configuration entropy could alter magnetic phase transition temperature, magnetic hysteresis, and refrigeration capacity in these BMGs. However, increasing configuration entropy did not lead to distinct differences in magnetic entropy change. The BMGs in this study exhibited good glass-forming ability and promising magnetocaloric effect, making them potential candidates for cryogenic refrigerants.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
J. W. Lv, C. Wei, S. Zhang, H. R. Zhang, X. Y. Zhang, M. Z. Ma
Summary: The size-dependence on the compressive mechanical and serrated-flow behaviors of Ti-based bulk metallic glass was investigated. Results showed that as the specimen diameter reduced, the compressive plasticity improved while the fracture strength decreased, indicating smaller specimens had softer characteristics. Additionally, the increase in specimen diameter resulted in a more discrete distribution of both strength and plasticity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Hu Huang, Minqiang Jiang, Jiwang Yan
Summary: Nanoindentation experiments were conducted on a Zr-based metallic glass under various loading rates, revealing that increasing the loading rate weakened the size of serrated flow but kept the number stable, while maintaining similar shear band features around residual indents. These results challenge the previous understanding derived from experiments using the Berkovich indenter.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Langting Zhang, Yajuan Duan, Eloi Pineda, Hidemi Kato, Jean-Marc Pelletier, Jichao Qiao
Summary: The influence of physical aging and cyclic loading on the power-law creep mechanism of a La30Ce30Ni10Al20Co10 high-entropy metallic glass was investigated. The results revealed significant discrepancies between thermal treatment and mechanical treatment in terms of the creep mechanism.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Wook Ha Ryu, Won-Seok Ko, Haruka Isano, Rui Yamada, Hehsang Ahn, Geun Hee Yoo, Kook Noh Yoon, Eun Soo Park, Junji Saida
Summary: In this study, we systematically investigate the compressive plasticity and shear band behavior of Zr-based bulk metallic glasses (BMGs) with different Poisson's ratio and aspect ratios/contact friction coupling. Our findings demonstrate that lower contact friction and smaller aspect ratios can promote shear band distribution and improve global plasticity. We propose three stages of plastic flow in BMGs and show that the variation of plastic flow is mainly affected by aspect ratio and Poisson's ratio. We also propose a three-dimensional map of plastic flow in Zr-based BMGs reflecting the key multi-variables for shear band behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Tianqing Li, Hongxiang Zong, Fuhai Zhao, Xiangdong Ding, Turab Lookman, Jun Sun
Summary: The calorimetric and dynamical glass transitions are decoupled in high entropy metallic glasses (HEMGs), and the underlying mechanism and connection to atomic structure are not understood. Molecular dynamic simulations are performed to investigate the glass transition behavior of different HEMG model systems. It is found that the effect of mismatch entropy plays a critical role in decoupling vitrification kinetics/α-relaxation in HEMGs, and the atomic size difference contributes significantly to the sluggish diffusion and decreased dynamic heterogeneities.
Article
Physics, Multidisciplinary
LangTing Zhang, YaJuan Duan, Daniel Crespo, Eloi Pineda, YunJiang Wang, Jean-Marc Pelletier, JiChao Qiao
Summary: Dynamic mechanical relaxation is a fundamental tool for understanding the mechanical and physical properties of viscoelastic materials like glasses. The high-entropy bulk metallic glass exhibits a distinct beta-relaxation feature. Anelastic strain is contributed by the stochastic activation of shear transformation zones (STZs), and interactions between STZs induce viscous-plastic strain under certain conditions.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Chemistry, Physical
Y. Ohashi, T. Wada, H. Kato
Summary: The glass-forming ability of Zr-Cu-based metallic glass with high entropy was investigated by adding elements such as Ag, Hf, and Ni. The study found that the addition of elements created new competitive liquid crystalline phases and improved the glass-forming ability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Yin Du, Qing Zhou, Xuhui Pei, Hanmin Wang, Haifeng Wang, Weimin Liu
Summary: This study investigated the properties of HE-BMG with minor Sn addition and found that within a certain composition range, the addition of Sn can significantly improve the wear resistance. However, excessive Sn addition leads to a change in the wear mechanism and a decline in wear resistance.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Xiang Li, Xinhui Fan, Bing Li, Xin Wang, Yanhong Li, Ke Yang
Summary: In this study, quasi-static and dynamic compression experiments were conducted on a Hf28Be18Ti17Zr17Cu7.5Ni12.5 high-entropy bulk metallic glass under different strain rates. It was found that the strain rate had limited influence on the fracture strength but caused plastic strain disappearance under quasi-static loading. The dynamic deformation behavior showed strain-rate softening, decreasing yield strength, and three distinct failure modes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Kunsen Zhu, Pingjun Tao, Chaohan Zhang, Zhihao Zhao, Weijian Zhang, Yuanzheng Yang, K. Kaviyarasu
Summary: The plastic deformation behavior of metallic glass at room temperature is highly sensitive to strain rates, with plastic strain, yield strength, compressive strength, and fracture strength increasing as strain rates decrease. The number and density of shear bands also increase with decreasing strain rates, influencing the overall fracture morphology and serrated flow behavior.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Y. J. Duan, L. T. Zhang, T. Wada, H. Kato, E. Pineda, D. Crespo, J. M. Pelletier, J. C. Qiao
Summary: The anelastic deformation behavior of Pd 20 Pt 20 Cu 20 Ni 20 P 20 high-entropy metallic glass was studied through monitoring the stress relaxation and recovery processes. A constitutive model was proposed to describe the stress relaxation process, considering a hierarchy of relaxation processes related to the structural heterogeneity. The crossover from stochastic activation to percolation of flow defects was observed during the stress relaxation process. The recovery time-spectra revealed the evolution of flow defects in the metallic glass.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Ji Wang, Zhengqing Cai, Qi Qiao, Heng Kang, Shidong Feng, Yanhui Zhang, Zijing Li, Li-Min Wang
Summary: A new design strategy of metallic glasses using melting entropy as a guide for compositions is proposed in this study, where intermetallic compounds can be considered as starting materials. The strategy based on melting entropy is verified through detailed studies on Cu-Zr-Hf alloys. By triggering metallic glass design with intermetallic compounds, the traditional cognition of excluding intermetallic compounds in glass formation compositions is challenged, reinforcing the viewpoint that low melting entropy promotes glass formation. This new strategy provides a highly targeted approach to search for starting materials in glass design, distinct from the trial-and-error mode. It also offers a new perspective for understanding the mechanism of glass formation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
H. H. Tang, X. B. Li, J. S. Zhang, D. Zhou, Z. W. Wu, S. H. Chen
Summary: Fractal analyses were conducted to unravel the relationship between serrated flows and complex shear bands in evolving bulk metallic glasses (BMGs). The increase of strains led to continuous increases in fractal dimensions of both shear-band patterns and serrated flows. Positive correlation between load-drop distributions and shear-band patterns was observed from the perspective of chaos degree. Hurst exponents less than 0.5 indicated a strong negative correlation behavior and a negative feedback mechanism in shear band development. Fractal dimensions and Weibull moduli at different strain stages indicated that load drops initially demonstrated relatively high uniformity and then stabilized at a low uniformity, which was related to regular shear-band patterns with fractal structure. These findings provide further understanding of the formation of shear bands and serrated flows in BMGs and offer a new method to uncover the plastic deformation mechanisms of BMGs using fractal analysis.
Article
Chemistry, Physical
Kun Zhang, Zheng Hu, Zigiang Zhao, Bingchen Wei, Yansen Li, Yuhang Wei
APPLIED SURFACE SCIENCE
(2018)
Article
Metallurgy & Metallurgical Engineering
Yu-hang Wei, Kun Zhang, Zi-qiang Zhao, Yan-sen Li, Bing-chen Wei
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2018)
Article
Materials Science, Multidisciplinary
Zheng Hu, Xianqi Lei, Yang Wang, Kun Zhang
MATERIALS RESEARCH EXPRESS
(2018)
Article
Physics, Multidisciplinary
Yang Wang, Kun Zhang, Yihui Feng, Yansen Li, Weiqi Tang, Bingchen Wei
Article
Materials Science, Ceramics
Yansen Li, Yanpeng Wei, Kun Zhang, Yating Zhang, Yang Wang, Weiqi Tang, Bingchen Wei
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2019)
Article
Nanoscience & Nanotechnology
Yansen Li, Kun Zhang, Yang Wang, Weiqi Tang, Yating Zhang, Bingchen Wei, Zheng Hu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Engineering, Mechanical
Yating Zhang, Zheng Hu, Luca Susmel, Jing Zhang, Kun Zhang, Yansen Li, Yang Wang, Bingchen Wei
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2020)
Article
Optics
Yansen Li, Yanpeng Wei, Xu Yi, Kun Zhang, Bingchen Wei
Summary: This study investigated the dynamic mechanical properties of Zr-based metallic glasses before and after laser shock peening (LSP) treatment, revealing a significant increase in storage modulus near the glass transition temperature and an increased deviation between experimental results and theory prediction. A competing mechanism between liquid-like region change and pre-existing fringe-like precipitations was proposed to explain the unusual dynamic behaviors of metallic glasses after LSP treatment. The results provide insightful information about the microstructural changes and viscoelastic properties of metallic glasses post LSP.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yang Wang, Kun Zhang, Yihui Feng, Yansen Li, Weiqi Tang, Yating Zhang, Bingchen Wei, Zheng Hu
Article
Materials Science, Multidisciplinary
Liuming Wei, Jingwen Li, Yonggang Li, Qirong Zheng, Fan Cheng, Chuanguo Zhang, Jingyu Li, Gaofeng Zhao, Zhi Zeng
Summary: This study investigates the influence of He-V complexes on H behaviors on different W surfaces using DFT calculations. The results show that H dissolution is most difficult but H trapping is easiest on the W (110) surface, while the opposite is true on the W (111) surface. Moreover, the presence of He-V complexes increases the difficulty of H diffusion from bulk to surface and desorption.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yan Meng, Song Zeng, Chen Chen, Chaowen Zhu, Huahai Shen, Xiaosong Zhou, Xiaochun Han
Summary: The characteristics of magnetron sputtered Cr coatings vary with different temperature, bias voltage, and pressure. Coatings with random orientation, good crystallinity, and small grain size exhibit favorable oxidation behavior, while coatings with strong (200) texture, poor crystallinity, and large grains have many intrinsic defects that are detrimental to the protection property of the Cr coatings.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xinyuan Xu, Zefeng Yu, Wei-Ying Chen, Aiping Chen, Arthur Motta, Xing Wang
Summary: This study presents an automated approach for characterizing grain morphology in TEM images recorded during ion irradiation. By combining a machine learning model and a computer vision algorithm, comparable results to human analysis can be achieved with significantly reduced analysis time. Researchers can train their own models following the procedures described in this study to automate grain morphology analysis of their own TEM images.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Shihao Wu, Dong Wang, Yapei Zhang, Koji Okamoto, Marco Pellegrini, Wenxi Tian, Suizheng Qiu, G. H. Su
Summary: The oxidation and degradation mechanisms of Cr coating on Zr alloy cladding under high temperature steam atmosphere are summarized, and a mathematical analysis model is established to predict the changes in coating thickness. The model is applied in the analysis of structure evolution under different conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
V. Diaz-Mena, J. de Prado, M. Roldan, I. Izaguirre, M. Sanchez, M. Rieth, A. Urena
Summary: The brazeability of a cupronickel alloy was evaluated as a filler alloy for high-temperature joining of tungsten to steel. The study investigated the brazing conditions and the impact of the selected filler on the joint quality using numerical software. The results showed different metallurgical interactions and diffusion phenomena between the filler alloy and the base materials at different temperatures. The study emphasized the importance of selecting a suitable filler to mitigate residual stresses in the joints.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Pengcheng Zhu, Yajie Zhao, Yan-Ru Lin, Jean Henry, Steven J. Zinkle
Summary: This study investigates the effect of heavy-ion irradiation on radiation hardening in high-purity binary alloy Fe18Cr. Nanoindentation testing and high-quality TEM imaging were conducted to extract hardness and microstructure information. The strength factor was accurately calculated based on the detailed TEM characterization of irradiated microstructures, and a refined hardening superposition method was applied to quantify the mechanical properties of ion-irradiated materials.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bin Wu, Haixia Ning, Hanzhen Zhu, Jianjun Chen, Kang Wang, Daiyu Zhang, Fu Wang, Qilong Liao
Summary: This study discusses the effects of ZrO2 and B2O3 on the phase composition and properties of SAP-based glass-ceramics. The results show that ZrO2 addition improves the formation of NZP phase while restricting the crystallization of AlPO4 phases. The correct ratios of ZrO2 and B2O3 allow only the formation of NZP phase within the SAP glass.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Hwasung Yeom, Greg Johnson, Benjamin Maier, Tyler Dabney, Kumar Sridharan
Summary: Cr-Nb bilayer coatings were developed using cold spray deposition to improve the limiting operational temperature of Cr-coated Zr-alloy system. The coatings exhibited outstanding oxidation resistance at high temperatures and formed continuous intermetallic compound layers at the interfaces.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Padhraic L. Mulligan, Andrew T. Nelson, Chad M. Parish, Patrick A. Champlin, Xiang Chen, Daniel Morrall, Jason M. Harp
Summary: Environmental barrier coatings are being developed to reduce oxidation and embrittlement in Zr-based materials. Chromium nitride is a candidate for this application, but understanding its impact on irradiation-induced creep and microstructure is critical.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Dexuan Yan, Xinlei Cao, Ke Shen
Summary: This study investigated the purification mechanism of polycrystalline graphite by comparing IG-11 graphite with IG-110 nuclear grade graphite. The analysis revealed that metallic impurities in IG-11 were primarily segregated within graphite porosities, while IG-110 demonstrated a significant reduction in impurities. This research contributes to the development of innovative graphite purification techniques for greater purity and stronger oxidation resistance.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Wei Xu, Wei Peng, Lei Shi, Qi Sun
Summary: This paper investigates the oxidation and shape evolution of matrix graphite in high temperature gas-cooled reactors during air-ingress accidents. A reaction kinetics model is established and computational fluid dynamics with a dynamic mesh method is used to simulate the oxidation process. The results show that the geometric shape of graphite changes significantly with increasing flow rate, and the graphite pebbles tend to form a structure with a narrow front and wide tail.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Allison Harward, Casey Elliott, Michael Shaltry, Krista Carlson, Tae-Sic Yoo, Guy Fredrickson, Michael Patterson, Michael F. Simpson
Summary: This paper investigates the hygroscopic properties of eutectic LiCl-KCl absorbed into zeolite-4A. The study finds that water absorption and corrosion worsen with increasing salt loading. It also suggests that the salt can be stored in a non-inert atmosphere for a certain period of time.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Takaaki Koyanagi, Xunxiang Hu, Christian M. Petrie, Gyanender Singh, Caen Ang, Christian P. Deck, Weon-Ju Kim, Daejong Kim, James Braun, Yutai Katoh
Summary: This study provides critical experimental data on the effects of irradiation on the hermeticity of SiC composite cladding, finding that irradiation can cause a decrease in hermeticity and cracking, and coating the outer surface can mitigate the cracking issue.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
S. Krat, A. Prishvitsyn, Yu. Gasparyan
Summary: This study proposes a probabilistic and diffusion-based model to describe the co-deposition of multiple hydrogen isotopes with slowly grown metal layers. The model calculates the relative concentrations of different hydrogen isotopes in the co-deposited metal layers. It is found that if hydrogen isotopes have different detrapping energies, only the isotope with the highest detrapping energy shows a monotonic decrease in concentration with deposition temperature. Furthermore, the study evaluates the uncertainty of tritium concentration in the co-deposited layer based on the uncertainty in detrapping energy of tritium and deuterium, predicting a >10% tritium concentration uncertainty for a 0.01 eV difference.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tijo Vazhappilly, Arup Kumar Pathak
Summary: This study investigates the effect of Ce atom substitution in UO2 on its thermophysical properties using density functional theory. The results show that the Ce substitution levels and the oxidation state of Ce/U atoms strongly influence the band structure and specific heat capacity of the UO2 lattice. These findings provide important insights into the fuel properties of UO2 under reactor conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)
