Article
Multidisciplinary Sciences
Yao Tang, Haofei Zhou, Haiming Lu, Xiaodong Wang, Qingping Cao, Dongxian Zhang, Wei Yang, Jian-Zhong Jiang
Summary: By adjusting processing conditions, controllable structural gradients can be designed in bulk metallic glasses, resulting in enhanced plasticity and suppression of shear localization.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Mechanical
Wei-Hui Lin, Chong-Min She, Chun-Yu Zhang, Paulo S. Branicio, Zhen - Dong Sha
Summary: The mechanical properties of cellular metallic glasses are influenced by the shape of their cellular structures. Random structures with uniform porosity show higher yield strength and Young's modulus compared to microlattice structures. The chiral structure displays the highest Young's modulus, while stochastic cellular structures exhibit higher energy absorption capacity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Physical
Ziyun Long, Pingjun Tao, Guotai Wang, Kunsen Zhu, Yugan Chen, Weijian Zhang, Zhihao Zhao, Yuanzheng Yang, Zhenghua Huang
Summary: This study reports that microalloying can improve the plasticity of bulk metallic glasses (BMGs) at room temperature. The selection of minor elements Nb and Ta has a positive heat of mixing with the based compositions. The self-organize to a critical state (SOC) occurs in all BMGs, with a constant scaling exponent beta value. The variation of the rotation angle of primary shear bands (SBs) is consistent with plasticity. Meanwhile, the yield strength is linearly dependent on the local fracture toughness of BMGs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Sen Yang, Mingcan Li, Peng Cao, Long Zhang, Qunbing Zhang, Boyu Cai, Yong Fang
Summary: The mechanical properties of multiphase Ti-based bulk metallic glass composites (BMGCs) were studied, and the effect of brittle intermetallic phase on the properties was discussed. The microstructure was adjusted to enhance the yield strength using minor Sn addition.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Chemistry, Physical
Yu Chen, Zheng-Wei Dai, Jian-Zhong Jiang
Summary: Metallic glasses and high entropy alloys have shown remarkable features but also have issues. Recent efforts have been made to address these problems by introducing new concepts and mechanisms. High entropy metallic glasses, combining the advantages of both, have become a research focus.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
A. H. Cai, G. Zhou, P. W. Li, D. W. Ding, Q. An, G. J. Zhou, Q. Yang, Y. P. Lin, H. Mao
Summary: The relationship between microstructure and mechanical property of three Zr-based bulk metallic glasses (BMGs) was investigated. The results show that the content of CuZr2-type phase increases but that of Zr6Al2Ni-type phase decreases with increasing Zr content. The plastic flow stress and strain decrease while the plasticity increases with increasing fraction of CuZr2-type cluster, which is named as geometrically unfavorable motifs (GUMs). The fitting parameters from cumulative probability statistics provide valuable clues for investigating the plastic flow and plasticity of the BMGs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
A. Lindsay Greer, Miguel B. Costa, Owain S. Houghton
Summary: There have been remarkable advances in the field of metallic glasses over the last 50 years, including an expanded range of compositions, improved production and shaping techniques, and the discovery of property combinations offering unparalleled performance. Ongoing research continues to provide fundamental insights into the structure and properties of glasses and liquids. This article focuses on the latest advances in understanding and the rapidly expanding prospects for applications.
Article
Materials Science, Multidisciplinary
Chang Liu, Suyue Yuan, Jinwoo Im, Felipe P. J. de Barros, Sami F. Masri, Paulo S. Branicio
Summary: Molecular dynamics simulations are used to investigate the mechanical properties of nanoporous CuxZr1-x metallic glasses. The study reveals a strong correlation between Young's modulus, Ultimate Tensile Strength (UTS), and porosity/composition. Increasing porosity leads to a change in nanoporous topology and a transition from brittle to ductile deformation and failure mechanisms. Genetic Programming (GP) is employed to establish scaling laws for E and UTS as a function of porosity and composition, accurately predicting their values in the entire range considered.
Article
Materials Science, Multidisciplinary
J. Dong, J. Shen, Y. H. Sun, H. B. Ke, B. A. Sun, W. H. Wang, H. Y. Bai
Summary: The study found that the torsion fracture of metallic glasses may deviate from the circumferential shear plane, and the fracture angle is closely related to the composition and size, showing an intrinsic relationship between fracture mechanism and fracture toughness in MGs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Xiaochang Tang, Laiquan Shen, Huaping Zhang, Wanghui Li, Weihua Wang
Summary: Metallic glasses have potential as engineering materials, but their limited ductility is a major challenge. This study investigates the formation of nano-corrugations (NCs) in brittle metallic glasses and proposes a stress-driven cavitation process as the underlying mechanism. The findings shed light on the understanding of dynamic fracture propagation in amorphous materials and have implications for predicting damage development.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Jiazi Bi, Xinquan Wei, Xiaobin Liu, Ran Li, Ruijuan Xiao, Tao Zhang
Summary: A family of novel Os-Co-Ta-B high-temperature bulk metallic glasses (HTBMGs) with high glass transition temperature, Vickers microhardness, and compressive strength was fabricated by introducing high-modulus refractory metal Os and strong-covalent metalloid B. The impressive strength is attributed to the strong bond characteristics especially for Ta-Os and B-B bonds. The castable OsCo-based HTBMGs with superior mechanical properties and high thermal stabilities are significant for high-temperature applications as advanced structural materials.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Yu-Chia Yang, Zhenhai Xia, Sundeep Mukherjee
Summary: This paper explores the relationship between atomic structure and mechanical properties of metallic glasses by using molecular dynamics simulation. The study found that changes in mechanical properties can be linked to short- and medium-range ordering in the atomic structure. Structural statistics, such as Voronoi analysis, were used to determine the mechanical properties of the metallic glass.
Article
Chemistry, Physical
C. Y. Liu, Y. X. Zhang, G. Yuan, C. Y. Zhang, R. D. K. Misra, J. Kang
Summary: The study proposes a novel composition and design strategy for Fe78.9B11.8Si7.6C1Cu0.7 alloy, which successfully achieves excellent magnetic properties and plasticity in Fe-based metallic glasses. This innovation is expected to contribute to the development of next-generation magnetic materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
V Jambur, C. Tangpatjaroen, J. Xi, J. Tarnsangpradit, M. Gao, H. Sheng, J. H. Perepezko, I Szlufarska
Summary: This study shows that minor alloying can enhance the strength of metallic glasses by increasing the chemical bond strength, which is distinct from changes in topological ordering. The addition of transition metals to Al-Sm based metallic glasses increased their hardness, mainly due to the strong bonding between transition metals and aluminum atoms. The effects of topology and chemistry on the mechanical properties of metallic glasses are independent of each other, providing insights for the design of metallic glasses with improved mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Civil
Yu Chen, Jia-Cheng Zhang, Paulo S. Branicio, Zhen-Dong Sha
Summary: This study uses molecular dynamics simulations to investigate the mechanical properties and failure mechanisms of brick-and-mortar metallic glasses. The results show that a desirable balance between strength and plasticity can be achieved in BMMGs with appropriate brick aspect ratios and interlayer thicknesses.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
H. Tran, Y. F. Gao, H. B. Chew
Summary: Introduced a novel field projection method to reconstruct the cohesive zone laws for steady-state fatigue crack growth. This method accurately extracts the crack-tip cohesive tractions and separations, addressing the challenge of unloading-reloading hysteresis in fatigue cycling.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Biao Ding, Weili Ren, Yunbo Zhong, Xiaotan Yuan, Tianxiang Zheng, Zhe Shen, Yifeng Guo, Qiang Li, Chunmei Liu, Jianchao Peng, Josip Brnic, Yanfei Gao, Peter K. Liaw
Summary: This investigation presents the results of the strain-controlled creep-fatigue behavior of a precipitation-strengthened Nickel-based superalloy. The study highlights the saturation effect on the cyclic life and provides theoretical guidelines for the safe design of superalloy components in creep-fatigue deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Di Xie, Rui Feng, Peter K. Liaw, Hongbin Bei, Yanfei Gao
Summary: This study investigates the long-term tensile creep behavior of multicomponent equiatomic solid solution alloys with face-centered cubic crystal structures. It is found that dislocation creep is the dominant deformation mechanism for all the alloys studied. Despite variations in room-temperature strength and creep rate, the creep lifetime data for these alloys are similar.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Xue Wang, Yanfei Gao, Martin McDonnell, Zhili Feng
Summary: The article introduces the process of diffusion bonding and elimination of interfacial pores in solid-state bonding techniques. A new modeling framework of bonding fraction evolution is proposed, which is then applied to the Friction Stir Welding process, providing a figure of merit for industrial applications and FSW process design.
Article
Engineering, Mechanical
Biao Ding, Weili Ren, Yunbo Zhong, Xiaotan Yuan, Tianxiang Zheng, Zhe Shen, Yifeng Guo, Qiang Li, Jianchao Peng, Josip Brnic, Yanfei Gao, Peter K. Liaw
Summary: This study found that the generalized cyclic life saturation can be achieved through a dynamic equilibrium between straight single superdislocations and dislocation networks. The saturation phenomenon can be easily achieved by increasing local damage. The rate of change of straight single superdislocations is low in the range of large deformations.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Di Xie, Wei Zhang, Zongyang Lyu, Peter K. Liaw, Huy Tran, Huck Beng Chew, Yujie Wei, Yang Ren, Yanfei Gao
Summary: Despite the superior mechanical properties of magnesium alloys, their potential applications are limited due to a lack of understanding of their failure mechanisms. This study utilizes synchrotron X-ray diffraction technique to analyze in situ strain mapping in a highly textured ZK60 Mg alloy. The results show good agreement with micromechanical modeling and reveal localized twin activities near the fatigue crack.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(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, Multidisciplinary
Shuying Chen, Jingbo Qiao, Haoyan Diao, Tengfei Yang, Jonathan Poplawsky, Weidong Li, Fanchao Meng, Yang Tong, Liang Jiang, Peter K. Liaw, Yanfei Gao
Summary: Improving creep resistance is often achieved by optimizing alloy design to create strong solid-solution strengthening and/or coherent precipitates for dislocation blockage. High-entropy alloys (HEAs), which are single-phase solid-solutions, exhibit creep properties comparable to precipitate-strengthened ferritic alloys. However, many HEAs develop incoherent second phases during long-term annealing, reducing their lifetime and limiting their use at high temperatures. This study demonstrates the exceptional creep resistance of a non-equiatomic Al0.3CoCrFeNi HEA, which has a much lower creep strain rate compared to the Cantor alloy and its subsets. The research reveals that the suppression of B2 precipitate phase during the early stage of creep deformation and the emergence of metastable and coherent L1(2) precipitates significantly contribute to creep strengthening.
Article
Materials Science, Multidisciplinary
Wenjian Yang, Ma Luo, Yanfei Gao, Xiqiao Feng, Jinju Chen
Summary: This paper proposes a computational model to study the mechanosensing mechanisms of fibroblast cells on elastic hydrogel substrates. By considering the sensing mechanisms of cells to the rigidity, deformation, and traction forces of the substrate and neighboring cells, the model predicts the effects of substrate stiffness and thickness on stress fiber formation, disassociation, and integrin density. The results show that cells can sense neighboring cells by deforming the underlying substrate, and collective cells have enhanced mechanosensing capacity. This model not only enhances our understanding of cell mechanosensing, but also has implications for the design of biomaterials for tissue engineering and wound healing.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
D. Xie, Z. H. Li, T. T. Sasaki, Y. F. Gao, Z. Y. Lyu, R. Feng, Y. Chen, K. An, H. B. Chew, T. Nakata, S. Kamado, K. Hono, P. K. Liaw
Summary: The low-alloyed Mg-Al-Ca-Mn alloy, as a new class of heat-treatable magnesium alloys, shows great engineering potential due to its excellent extrudability and high strength achieved by the dispersion of Guinier-Preston (G.P.) zones. In this study, in situ neutron diffraction measurements were conducted to investigate the cyclic deformation behavior of this alloy with and without G.P. zone dispersion. The relationship between macroscopic deformation behavior and microscopic response at the grain level, such as twinning and detwinning, was established.
Article
Thermodynamics
Tongxin Shan, Xiaoqing Zhu, Zhenpo Wang, Hsin Wang, Yanfei Gao, Lei Li
Summary: This study investigates the explosion dynamics of large-format Li-ion cells through experimental and numerical research. Overcharge-to-explosion tests on 40 Ah Li-ion cells reveal the presence of Von Neumann peaks on pressure curves, indicating supersonic shockwave velocity, and the experiment confirms detonation instead of deflagration. Furthermore, a geometric model is established to study the explosion behavior numerically, revealing the propagation mechanism of the shockwave. This study fills the research gap on thermal runaway of Li-ion cells, especially in extreme cases like fire and explosion, and provides valuable guidance for battery safety.
APPLIED THERMAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Zhongtao Li, Shihua Ma, Shijun Zhao, Weidong Zhang, Fei Peng, Qian Li, Tao Yang, Chia-Yi Wu, Daixiu Wei, Yi-Chia Chou, Peter K. Liaw, Yanfei Gao, Zhenggang Wu
Summary: By maximizing the volume misfits, a single-phase Ni-based FCC alloy with a superb yield strength (-1.05GPa) and good ductility (37%) is designed. This study provides two surprising and novel findings for single-phase FCC alloys: volume misfit is a good relevant indicator of kHP, and screw dislocations can contribute to strengthening once the solute-induced stress field reaches a critical value.
Article
Nanoscience & Nanotechnology
Zongyang Lyu, Zehao Li, Taisuke Sasaki, Yanfei Gao, Ke An, Yan Chen, Dunji Yu, Kazuhiro Hono, Peter K. Liaw
Summary: It is reported that interstitial metastable high entropy alloys (HEAs) can achieve a wide range of strength-ductility trade-offs through different annealing temperatures and times. The underlying mechanisms were investigated using in situ neutron diffraction, electron backscattered diffraction, and electron channel contrast imaging analyses. These techniques revealed that the phase transformation process can be tuned by various annealing processes, resulting in different degrees of load partitioning and sharing among different phases and grain families on the commensurate microstructural length scales. Therefore, the microstructures generated by thermal treatments and phase transformation from face-centered-cubic to hexagonal-close-packed phases can efficiently improve the ductility of the studied alloys.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Huwen Ma, Yanchun Zhao, Zhi Lyu, Xue Wang, Yuntian Zhu, Yanfei Gao
Summary: Using a sandwich structure as an example, this study demonstrates that the formation of dispersive shear bands on the surfaces of layered/gradient materials is caused by localized necking, rather than the previously believed hetero-deformation-induced (HDI) strengthening mechanism. Unlike the commonly observed necking mode, the layered structure exhibits necking at intermediate wavelengths during tensile deformation, resulting in larger ductility. These findings not only explain recent experimental observations, but also offer an alternative approach to understanding and improving the ductility in heterostructured materials.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Qingqing Ding, Yongkang Li, Jie Ouyang, Xiao Wei, Ze Zhang, Yanfei Gao, Hongbin Bei
Summary: This study systematically investigates the effect of stacking fault energy (SFE) on the mechanical properties and deformation mechanisms of NiCo-based alloys. The results show that SFE has little effect on yield strength but affects the ultimate tensile strength and elongation to fracture. At lower temperatures, a lower SFE is associated with a higher ultimate tensile strength.
MATERIALS TODAY NANO
(2023)
