Article
Chemistry, Physical
Mingcan Li, Huimin Guan
Summary: This study investigates the effect of the upper temperature for cryogenic thermal cycling treatment on the plasticity of Fe-based bulk metallic glasses. It is found that the plasticity is highest when the upper temperature is about 0.62Tg. The understanding of the underlying mechanism provides guidance for the treatment process of Fe-based bulk metallic glasses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Ziyun Long, Pingjun Tao, Liwei Kong, Guotai Wang, Shengkai Huang, Shenghua Wen, Huajie He, Zhenghua Huang, Xuguang Zhu, Xi Xu, Huanhuan Deng, Yuanzheng Yang
Summary: This article investigates the effects of cryogenic thermal cycling on the microstructure and plasticity of Zr60Cu20Al10Ni10 bulk metallic glass. The heterogeneity of the internal structure of the cryogenic thermal cycling-treated samples increases the energy state and introduces more flow defects, resulting in an improved room-temperature plasticity of Zr-based BMGs. This phenomenon indicates a more frequent generation of shear transition zones and shear band movement within them.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
Nicolas Amigo
Summary: Rejuvenation in metallic glasses (MGs) can be achieved by thermal cycling treatments, which result in enhanced ductility. Atomic scale studies showed that treated samples had higher potential energy and less-dense structures, fewer high-centrosymmetric Voronoi polyhedra, and increased liquid-like structures. Thermal cycling also reduced the fraction of 3-atom connections and increased 2-atom and 4-atom connections, explaining the enhanced plasticity of MGs.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Siyi Di, Qianqian Wang, Yiyuan Yang, Tao Liang, Jing Zhou, Lin Su, Kuibo Yin, Qiaoshi Zeng, Litao Sun, Baolong Shen
Summary: The study showed that Cu addition in bulk metallic glass leads to better plasticity and yield strength after cryogenic thermal cycling treatment, while maintaining excellent soft magnetic properties, promoting structural heterogeneities formation and shear band initiation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Lingling Wang, Zheng Wang, Wei Chu, Xi Zhao, Lina Hu
Summary: Rejuvenation of metallic glasses under cryogenic thermal cycling has attracted attention due to its potential for fundamental and practical interest. This study discovered the quasi-periodic characteristics of two typical evolution paths (rejuvenation and relaxation) in metallic glasses through extensive thermal cycling. It was found that rejuvenation mainly comes from local atomic motion in loosely packed regions, while relaxation occurs through cooperative motion of atoms in densely packed regions. The results provide a comprehensive understanding of the mechanism of rejuvenation and a new strategy for modulating the properties of metallic glasses by controlling microstructures through thermal cycling.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Miguel B. Costa, Juan J. London, Andreas Blatter, Avinash Hariharan, Annett Gebert, Michael A. Carpenter, A. Lindsay Greer
Summary: Cryogenic thermal cycling (CTC) is an effective method to improve the room-temperature plasticity and toughness of metallic glasses. However, the effects of CTC are still not well understood, especially the unexpected behavior of stored energy in metallic glasses during CTC. This study applies CTC to bulk metallic glasses based on Pd, Pt, Ti, or Zr, and evaluates the effects on calorimetric and mechanical properties. The results show that the CTC-induced effects decay over time and the properties return to their original state. A model is proposed to explain the CTC-induced effects as the accumulation of anelastic strain. The implications for data analysis and future research on CTC effects are highlighted.
Article
Chemistry, Physical
Zhuangzhuang Wang, Ping Huang, Xueling Fan, Fei Wang
Summary: The effect of heterogeneity on the behavior of a La-based metallic glass under cryogenic thermal cycling (CTC) was evaluated and analyzed by altering the heterogeneity through annealing treatment. Non-monotonic and monotonic processes observed in previous studies could be explained by the perspective of energy potential landscape. The location of the corresponding energy state in the landscape determined whether rejuvenation or relaxation occurs upon CTC treatment.
Article
Nanoscience & Nanotechnology
Hao Zhang, Zhong Wang, Peter K. Liaw, Junwei Qiao
Summary: The shear transformation zones of metallic glasses were extensively studied using nanoindentation. The mathematical relationship between the relevant parameters was analyzed in detail. Cryogenic thermal cycling treatment was applied to the bulk metallic glasses to achieve different activation volumes. Nanoindentation experiments were conducted in a load-controlled loading mode. The critical threshold of the maximum shear stress, (Zmax)C, was determined through noise-reduction procedures and statistical analysis. The activation volume, V*, was obtained by introducing a first-order polynomial to analyze the nonlinear slope. Based on the mean-field theory, a criterion (Zmax)C = V* - λ was successfully established, where λ = 0.30±0.10. Three applicable conditions of the criterion were extracted from previous studies on (Zmax)C and V* of metallic glasses.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Huimin Guan, Mingcan Li
Summary: The plasticity of Fe80P13C7 bulk amorphous alloy can be significantly enhanced by cryogenic thermal cycling treatment, which is attributed to the generation of more disordered high-energy states in the structure, facilitating the formation of multiple shear bands.
Article
Chemistry, Physical
Jing Sun, Ming Zhang, Guanzhong Ding, Yujia Wang, Mengmeng Yu, Feng Liu, Yuanwei Sun, Kunjun Zhu, Xiangjin Zhao, Li Liu
Summary: The hydrophobic properties of Zr-based bulk metallic glasses surfaces can be improved through annealing and cryogenic thermal cycling treatments. Micro-nano composite structures in superhydrophobic films provide corrosion protection.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
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
Materials Science, Multidisciplinary
Afrouz Hassanpour, Mayur Vaidya, Sergiy Divinski, Gerhard Wilde
Summary: The impact of different thermo-mechanical treatments on shear band diffusion in a model bulk metallic glass was investigated. It was found that HPT processing and cold rolling can enhance diffusion rates, while cryogenic thermo-cycling further increases shear band diffusion speed.
Article
Nanoscience & Nanotechnology
Limin Lai, Tianhao Liu, Xinghong Cai, Min Wang, Shengbiao Zhang, Wen Chen, Shengfeng Guo
Summary: The study introduces a series of low-cost refractory Mo-Co-B BMGs with enhanced GFA and high thermal stability, exhibiting exceptional hardness and Young's modulus.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Baoshuang Shang, Weihua Wang, Alan Lindsay Greer, Pengfei Guan
Summary: Thermal cycling in metallic glasses can induce rejuvenation and relaxation, gradually erasing the initial glass structure through local atomic rearrangements. Molecular dynamics simulations reproduce physically observed effects, suggesting potential for optimizing properties of metallic glasses through thermal cycling.
Article
Physics, Multidisciplinary
Huaping Sheng, Daniel Sopu, Simon Fellner, Jurgen Eckert, Christoph Gammer
Summary: By using high-resolution microscopy techniques, we quantitatively mapped the atomic density and strain distribution of individual shear bands, revealing the complex characteristics of shear bands. Shear bands exhibit density alternation and complex strain fields, which can cause segmentation and deflection of the shear bands.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Xiao-Ye Zhou, Ji-Hua Zhu, Yuan Wu, Xu-Sheng Yang, Turab Lookman, Hong-Hui Wu
Summary: A data-driven and machine learning assisted strategy was proposed to explore the design of high entropy alloys (HEA) with low hydrogen diffusion coefficients. By constructing a model to predict hydrogen solution energies using machine learning algorithms, the correlation between atomic structures and diffusion coefficients of HEAs was inferred. The whale optimization algorithm was then used to discover HEA atomic structures with low hydrogen diffusion coefficients. Furthermore, a quantitative relationship between diffusion coefficient and chemical composition was proposed to guide the design of HEAs with strong resistance to hydrogen embrittlement.
Article
Materials Science, Multidisciplinary
Lei Shao, Guoliang Xie, Xinhua Liu, Yuan Wu, Qing Tan, Lu Xie, Shewei Xin, Fang Hao, Jiabin Yu, Wenli Xue, Kai Feng
Summary: A distinctive combustion phenomenon is revealed in promoted ignition combustion tests of Ti-25V-15Cr and Ti-6Al-4V alloys, where the relationship between ignition temperatures and oxygen pressures follows the Van't Hoff equation due to the decomposition and volatilization of V2O5. Additionally, the burning velocity of the alloys is influenced by the phase structure of the matrix.
Article
Materials Science, Multidisciplinary
Wenyuan Gong, Mengjing Xie, Yuan Wu, Jishan Zhang
Summary: By increasing the Mg content and adding Cu and Zn into Al-Mg-Si alloys, beta and i' phases were precipitated in the alloy, leading to a synergistic strengthening effect and higher strength compared to single-phase precipitates. Specifically, the yield strength and tensile strength increased by 18.1 and 17.7 MPa, respectively.
Article
Materials Science, Multidisciplinary
Zening Wang, Yu Yan, Yuan Wu, Xin Huang, Yi Zhang, Yanjing Su, Lijie Qiao
Summary: Equiatomic TiZr(Hf, Ta, Nb) medium entropy alloys (MEAs) were developed to enhance corrosion resistance compared to pure Ti. Nb and Ta alloying can improve the corrosion resistance by reducing defects in passive films. The thickness of oxide films on TiZr(Hf, Ta, Nb) alloys increases in the order of Hf > Zr > Ti > Nb > Ta, indicating the ability of elements to form oxides. TiZrNb alloy exhibits higher tribocorrosion rate due to severe ploughing and delamination wear.
Article
Materials Science, Multidisciplinary
Jiabin Yu, Hui Wang, Yuan Wu, Guoliang Xie, Lei Shao, Yajun Li, Kangning Shan, Suihe Jiang, Xiongjun Liu, Jinfeng Huang, Zhaoping Lu
Summary: This study used a specially designed experimental apparatus with an in situ measurement system to investigate the combustion of a Cu46Zr46Al8 bulk metallic glass, revealing that it exhibited more violent and rapid combustion compared to its crystalline counterpart. The findings improve our understanding of the combustion mechanisms of metastable metallic materials and provide guidelines for the development of novel BMGs as advanced energetic materials.
Article
Materials Science, Multidisciplinary
Xiaoyuan Yuan, Yuan Wu, Xiongjun Liu, Hui Wang, Suihe Jiang, Zhaoping Lu
Summary: The coupling effects of the metastable austenitic phase and the amorphous matrix in a TRIP-reinforced BMG composite under compressive loading were investigated. The displacive phase transformation of the metastable austenitic phase was found to effectively consume local shear strain and relax the strain/stress concentration at the interface, greatly enhancing the plasticity of the TRIP-reinforced BMG composites.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jinyong Zhang, Bingnan Qian, Wang Lin, Ping Zhang, Yijin Wu, Yangyang Fu, Yu Fan, Zheng Chen, Jun Cheng, Jinshan Li, Yuan Wu, Yu Wang, Fan Sun
Summary: This article reports the presence of a complex structure of 332T twinning in a TWIP beta Ti-alloy under compressive deformation, including hierarchical and/or heterogeneous composite sub-structures, which contribute to improved strength, ductility, and strain-hardening behavior.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Letter
Materials Science, Multidisciplinary
Dabo Duan, Yuan Wu, Haotian Chen, Xianzhen Wang, Xiongjun Liu, Hui Wang, Suihe Jiang, Zhaoping Lu
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Zening Wang, Yu Yan, Yuan Wu, Yanjing Su, Lijie Qiao
Summary: The repassivation behavior of equiatomic TiZr (Hf, Ta, Nb) alloys was studied. It was found that TiZrHf had the highest repassivation rate, while TiZrNb had the highest coefficient of friction and wear rate. Tribofilm and material transfer were observed in all medium entropy alloys.
Article
Nanoscience & Nanotechnology
Fan Zhang, Junyang He, Yuan Wu, Huahai Mao, Hui Wang, Xiongjun Liu, Suihe Jiang, T. G. Nieh, Zhaoping Lu
Summary: The morphology and volume fraction of precipitates play crucial roles in the mechanical properties of precipitation-hardened HEAs. This study investigated the effects of Ni and Al on the precipitation behavior and mechanical properties of (FeCoCr)(98-x-y)NixTi2Aly (x = 25, 30, 35; y = 4, 6, 8) HEAs. It was found that increasing Ni and Al content promotes the formation of coherent γ' precipitates, but also leads to the appearance of an incoherent Heusler phase. The ratio of Ni to Al was found to be pivotal in the formation of the Heusler phase, and when the ratio exceeds 5, the Heusler phase can be completely eliminated. The findings provide valuable insights for the optimal design of precipitation-hardened HEAs and contribute to the understanding of precipitation behavior in highly concentrated alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhengqi Wang, Honghui Wu, Yuan Wu, Hailong Huang, Xiangyu Zhu, Yingjie Zhang, Huihui Zhu, Xiaoyuan Yuan, Qiang Chen, Shudao Wang, Xiongjun Liu, Hui Wang, Suihe Jiang, Moon J. Kim, Zhaoping Lu
Summary: In this study, large plasticity and high strength were achieved in NbMoTaW RHEAs through grain boundary engineering and the addition of metalloid B or C. The room-temperature brittleness of as-cast NbMoTaW RHEA was found to be caused by grain boundary segregation of oxygen, which was alleviated by the added metalloids, leading to a change in fracture morphology.
Article
Chemistry, Physical
Jinlong Du, Suihe Jiang, Peipei Cao, Chuan Xu, Yuan Wu, Huaqiang Chen, Engang Fu, Zhaoping Lu
Summary: This study reports a strategy to achieve high radiation tolerance at high temperatures. By enabling the disordering-ordering transition of nanoprecipitates in metallic materials, the radiation damage can be prevented, leading to improved radiation tolerance.
Letter
Materials Science, Multidisciplinary
Zhen Peng, Zai-Bin Luo, Bao-Wei Li, Jin-Feng Li, Heng-Wei Luan, Jia-Lun Gu, Yuan Wu, Ke-Fu Yao
Article
Nanoscience & Nanotechnology
Hailong Huang, Yan Sun, Peipei Cao, Yuan Wu, Xiongjun Liu, Suihe Jiang, Hui Wang, Zhaoping Lu
Summary: This study extensively investigated the phase stability of high entropy alloys (HEAs) at intermediate temperatures and found that the effect of cooling rates on refractory HEAs depends on the alloy composition and material properties. This provides a new approach for optimizing the properties of HEAs.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Xiangyang Peng, Yuhai Tang, Xiangbin Ding, Zhichao Lu, Shuo Hou, Jianming Zhou, Shuyin Han, Zhaoping Lu, Guangyao Lu, Yuan Wu
Summary: The Fe49.7Cr18Mn1.9Mo7.4W1.6B15.2C3.8Si2 amorphous coating deposited on T91 steel substrate using the HVOF spray technique exhibits excellent thermal stability and corrosion resistance, and can act as a stable barrier layer in liquid lead-bismuth eutectic (LBE).
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
