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
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
Nanoscience & Nanotechnology
R. T. Zhu, J. L. Yuan, Z. Wang, X. H. Shi, H. J. Yang, J. W. Qiao
Summary: A Ti-based metallic glass matrix composite demonstrates remarkable mechanical performance with different deformation mechanisms at room and cryogenic temperatures, providing guidance for enhancing the performance of MGMCs.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Ceramics
Xianmeng Tu, Shenghui Xie, Yanyuan Zhou, Liang He
Summary: This study investigates the method of enhancing the plasticity of bulk metallic glasses using ultrasonic impact treatment (UIT). The results demonstrate that BMGs exhibit significant tensile plasticity after UIT treatment, while also maintaining a relatively stable structure.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Long Zhang, Tingyi Yan, Daniel Sopu, Yi Wu, Binbin Jiang, Kui Du, Haifen Zhang, Juergen Eckert
Summary: This study investigates the influence of crystal behavior and properties on the mechanical properties of two types of metallic glass composites (MGCs). The deformation characteristics of crystals significantly alter the morphology and properties of shear bands (SBs) in the glass matrix. Crystals deforming via dislocations result in narrow and sharp SBs, while shape memory crystals with martensitic transformations exhibit continuously broadening SBs. The broadening and bifurcation of SBs play a crucial role in the superior mechanical properties of shape memory MGCs.
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
Materials Science, Multidisciplinary
Yunzhuo Lu, Shuang Su, Shengbiao Zhang, Yongjiang Huang, Zuoxiang Qin, Xing Lu, Wen Chen
Summary: Using laser additive manufacturing, a multi-layered Zr-based BMGC with gradient distribution of crystalline dendrites was fabricated, leading to exceptional combination of yield strength and tensile ductility. This synergy is attributed to the interaction of adjacent layers and the asynchronous deformation mode associated with the heterogeneous microstructure, showing promise for high-performance BMGCs for structural applications.
Article
Nanoscience & Nanotechnology
Sailong Zhang, Bo Shi, Jinhui Wang, Peipeng Jin
Summary: In this study, a nonuniform structure was created in a Zr-based metallic glass using lateral elastostatic preloading, which effectively suppressed shear band propagation and improved the relationship between strength and plasticity. Additionally, a stress-induced memory effect was observed during elastostatic loading. These findings have important implications for the rejuvenation and mechanical property improvement of metallic glasses.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Mechanical
Ge Wang, Yanming Zhang, Bingkun Zou, Yang Liu, Shiqi Zheng, Xiaochun Li, Wentao Yan, Zan Li, Y. Morris Wang
Summary: Additive manufacturing is increasingly used to fabricate metal matrix composites. This study investigates laser powder-bed fusion (L-PBF) to disperse particles in metal matrices during melting and remelting, resulting in a high dispersion of fine particles. Computer modeling and experiments verify the uniform dispersion of reinforcing particles, leading to improved mechanical properties in the composites. This approach is also demonstrated in copper materials, showing its versatility for other metals and alloys.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
Jiacheng Zhang, Mao Zhang, Xinyun Wang, Mo Li
Summary: Making composites with crystalline inclusions can improve plasticity in brittle metallic glasses. In this study, a new metallic glass matrix composite with a gradient network architecture was demonstrated. The unique microstructure of the composite leads to significant strain delocalization, delaying the generation of catastrophic shear bands. This is achieved by forming diffuse embryonic shear bands in the thin crystalline network interface and hindering/guiding their formation and movement in thick crystalline network regions.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Siyi Di, Haibo Ke, Qianqian Wang, Jing Zhou, Yong Zhao, Baolong Shen
Summary: The effects of cryogenic thermal cycling treatment on the tensile plasticity and structure change of metallic glass ribbons were systematically investigated. The study found that the treated samples showed pronounced beta-relaxation peaks and enhanced tensile plasticity. This suggests that cryogenic thermal cycling treatment has a significant impact on the energy states and structural heterogeneity of metallic glasses.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Huwen Ma, Yanchun Zhao, Xue Wang, Dong Ma, Yanfei Gao
Summary: Recent experiments have shown some success in improving the ductility of bulk metallic glass (BMG) composites containing metastable crystalline second-phase particles capable of TRIP-induced plasticity. The mechanisms behind these improvements are quantitatively investigated through micromechanical finite element simulations, revealing that for the metastable second phases to enhance the BMG composite ductility, the strength of the BMG matrix must be between that of soft austenite and hard martensite phases. This leads to effectively confining shear bands near the second phase, reducing maximum shear band strain, and thereby improving tensile ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Kei Maeda, Gaku Okuma, Satoshi Yoshida, Fumihiro Wakai, Akihisa Takeuchi, Masayuki Uesugi, Shun Yanagioka, Shun Matsunuma, Shingo Machida, Atsuo Yasumori
Summary: Contact damage is crucial in engineering applications as it affects mechanical resistance like wear, erosion, and impact failure. Indentation tests were conducted on glass-ceramics with hexagonal CaAl2Si2O8 or mica crystals using a tungsten carbide ball indenter (Hertzian contact). The experiment revealed that the glass-ceramic with hexagonal CaAl2Si2O8 exhibited ductility similar to the quasi-plastic behavior observed in the mica glass-ceramic. The yield stress of the glass-ceramics was estimated and the Y/E ratio of the glass-ceramic with hexagonal CaAl2Si2O8 was found to be higher than that of the mica glass-ceramic.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Multidisciplinary
Lei Zhang, Shuang Su, Wujing Fu, Jianfei Sun, Zhiliang Ning, Alfonso H. W. Ngan, Yongjiang Huang
Summary: The structural evolution near the crystalline/matrix interface in CuZr-based metallic glass composite (MGC) was investigated using in situ transmission electron microscope (TEM) tensile straining and molecular dynamics (MD) simulation. Plastic deformation of the crystalline phase occurred before the amorphous phase, involving recoverable martensite transformation, dislocation accumulation at the interface, and local amorphization between grains. Fracture did not occur along the interphase interface, but within the crystalline phase near the interface, indicating a strong interface and high work hardening rate of the crystalline phase. MD simulations revealed that the amorphous phase was marginally metastable compared to the stable B2 phase, while the B19' martensitic phase was metastable with higher energy, explaining the easy mutual transformation between B2 and amorphous phase, and the less frequent transformation product of B19' phase from B2 during straining.
COMPOSITES PART B-ENGINEERING
(2023)
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, Coatings & Films
Chun Yee Aaron Ong, Daniel John Blackwood, Yi Li
SURFACE & COATINGS TECHNOLOGY
(2019)
Article
Chemistry, Physical
J. Pan, Y. Lin, J. Zhang, W. Huang, Y. Li
Article
Chemistry, Physical
W. Cui, J. Pan, D. J. Blackwood, Y. Li
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Materials Science, Ceramics
F. H. Duan, J. Pan, Y. Lin, Y. Li
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2019)
Article
Nanoscience & Nanotechnology
R. Q. Cao, J. Pan, Y. Lin, Y. Li
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Ruqing Cao, Qin Yu, Jie Pan, Yan Lin, Andrew Sweet, Yi Li, Robert O. Ritchie
Article
Multidisciplinary Sciences
J. Pan, Yu. P. Ivanov, W. H. Zhou, Y. Li, A. L. Greer
Article
Materials Science, Multidisciplinary
Yan Lin, Qin Yu, Jie Pan, Fenghui Duan, Robert O. Ritchie, Yi Li
Article
Chemistry, Physical
Xiao-Yi Cuan, Yan Lin, Jie Pan, Dong-Ming Sun, Yi Li
Summary: The use of nacre-like structure in materials synthesis has yielded notable successes in creating novel structural composites, but few practical advances have been made in metals. In this study, a complex hierarchical microstructure, the brick-and-mortar structure, was successfully architected in metal/metal hybrids using lithographic method and electrodeposition technique, allowing accurate control of material composition and enhanced fracture toughness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Weihua Zhou, Yonghua Meng, Fenghui Duan, Wei Huang, Jiahao Yao, Jie Pan, Yinxiao Wang, Yi Li
Summary: The study found that the formation of the tau(3) phase (Zr50Cu29Ni2Al19 intermetallics) is triggered when the oxygen level reaches 350 ppm, with oxygen mainly concentrated in this phase. Additionally, the lattice parameter of the tau(3) phase increases with the oxygen content.
Article
Materials Science, Multidisciplinary
F. H. Duan, Y. Naunheim, C. A. Schuh, Y. Li
Summary: The study investigates the hardness and deformation behavior of body centered cubic Mo(O) alloys with grain sizes ranging from 120 to 4 nm, highlighting a peak hardness at 11 nm and a transition towards glass-like deformation behaviors as grain size decreases.
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
Materials Science, Multidisciplinary
Yunli Lu, Fenghui Duan, Jie Pan, Yi Li
Summary: Research on thermal stability of nanocrystalline metals reveals a high-throughput experimental strategy to rapidly determine the critical size of grain growth, which was found to be similar in gradient structured Ni and homogeneous structured Ni. The critical size was independent of the gradient structure, demonstrating a potential high-throughput strategy for exploring the size-dependent thermal stability of metals.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
J. Jiang, Z. B. Wang, S. J. Pang, Y. G. Zheng, Y. Li
Summary: The study reveals that oxygen impurities can improve pitting corrosion resistance in as-cast Zr61Ti2Cu25Al12 bulk metallic glasses when present at lower levels, but can worsen corrosion behavior at higher concentrations. This highlights the significant impact of oxygen impurities on the corrosion behavior of the material.
Proceedings Paper
Engineering, Mechanical
Q. H. Lu, J. S. Bai, Z. Cheng, L. Lu
40TH RISO INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE: METAL MICROSTRUCTURES IN 2D, 3D AND 4D
(2019)