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
Chemistry, Physical
Xinyu Liang, Yanhui Li, Feng Bao, Zhengwang Zhu, Haifeng Zhang, Wei Zhang
Summary: Soft magnetic Co-based bulk metallic glasses with large supercooled liquid region and high saturation magnetic flux density have been developed in a new Co-Fe-Y-B alloy system. Addition of appropriate contents of Y and Fe into the alloy can enlarge the supercooled liquid region and improve the glass-forming ability, leading to high magnetic properties.
Article
Chemistry, Physical
Ningning Shen, Yuluo Li, Zhengxu Dou, Kuang Lv, Mengnan Duan, Fushan Li, Yidong Wu, Yanli Wang, Xidong Hui
Summary: This study investigated the glass forming ability, mechanical, corrosion resistance, and soft magnetic properties of Fe-P-C-B-Si-Mo bulk metallic glasses. Results showed that the addition of Mo greatly enhanced the GFA and improved the magnetic properties, suggesting promising industrial applications.
Article
Materials Science, Multidisciplinary
S. J. Wu, Z. Q. Liu, R. T. Qu, Z. F. Zhang
Summary: By establishing quantitative correlations among compositions, elastic constants, GFA, and mechanical properties of metallic glasses (MGs), it is possible to predict their performance in advance. Experimental data confirms the validity of this predictive approach. A strategy for designing MGs with optimal combinations of strength, toughness, and GFA is proposed to allow for high-throughput discovery of glass formers with excellent mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Junpeng Ren, Yanhui Li, Xiaoyu Liang, Hidemi Kato, Wei Zhang
Summary: Soft magnetic Co-based bulk metallic glasses with large supercooled liquid region and high saturation magnetic flux density have been developed in a new Co-Fe-B-P-C alloy system, where the addition of Fe enhances the performance of the alloys.
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
Junyu Zhang, Shuang Ma, Hao Wang, Takeshi Kubota, Yanhui Li, Hidemi Kato, Rie Y. Umetsu, Man Yao, Wei Zhang
Summary: The addition of Nb and Fe improves the stability and forming ability of Co-based metallic glasses. Nb inhibits the deterioration of magnetic softness caused by Fe. These Co-based metallic glasses possess high GFA, wide supercooled liquid region, low viscosity, and good soft magnetic properties, making them highly promising for applications in micro electromagnetic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Da-wei Ding, Jing Tan, An-hui Cai, Yong Liu, Hong Wu, Qi An, Peng-wei Li, Yan Zhang, Qing Yang
Summary: The study found that Fe-C micro-alloying can improve the glass forming ability and physical and chemical properties of bulk metallic glasses (BMGs), but an increase in Fe and C content within a certain range may lead to a decrease in properties such as hardness.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Xin Li, Guangcun Shan, C. H. Shek
Summary: Machine learning models were trained to predict the saturated magnetization of Fe-based metallic glasses, considering their glass forming ability. Extreme gradient boosting model showed the best predictive performance on the test dataset, with high accuracy in predicting the magnetization.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jianhua Zhang, Chengzhong Zhang, Xiaoxiong Zhang, Zhien Li, Aina He, Jiancheng Song, Chuntao Chang
Summary: The study found that non-inert casting atmospheres can significantly improve the glass forming ability of P-containing Fe-based BMGs, while not affecting their thermal and magnetic properties. The surface composition of the BMGs varied greatly with different casting atmospheres, while the bulk composition remained unchanged. The enhancement of GFA by non-inert casting atmospheres was mainly attributed to the increased surface tension resulting from the elimination of oxygen element and the alloying effect of nitrogen element in the casting atmospheres.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Shan Zhang, Chao Wei, Zhilin Shi, Haoran Zhang, Mingzhen Ma
Summary: Fe doping significantly improves the glass-forming ability, stability, and mechanical properties of Zr50Cu34-xFexAl8Ag8 metallic glasses. The addition of Fe inhibits the formation of crystalline phases, increases the glass-forming ability, and enhances the fracture strength and ultimate strain of the metallic glass samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
Materials Science, Multidisciplinary
Yuanyuan Wang, Aimin Wang, Hong Li, Haifeng Zhang, Zhengwang Zhu
Summary: Glass forming ability is crucial for the processing and application of metallic glasses. This study investigates the thermodynamic properties of TiZr-based alloys and shows that the glass forming ability can be improved through minor alloying.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Li Peng, Zhilin Long, Mingshengzi Zhao
Summary: This study proposes a random forest regression model based on the metal alloy composition dataset to predict the glass forming ability of bulk metallic glasses. By screening feature parameters and optimizing hyperparameters, the accuracy of the model has been improved, revealing the importance of characteristic temperatures and topological structure parameters in describing the formation of alloy glasses.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
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
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.
Article
Nanoscience & Nanotechnology
Yaojia Ren, Bo Han, Hong Wu, Jianchuan Wang, Bin Liu, Bingqiang Wei, Zengbao Jiao, Ian Baker
Summary: For the first time, the formation of nanotwins and 9R phase were observed in ultrafine-grained Ti-5wt.%Cu alloys with an average lath width of 223 nm produced by laser powder bed fusion. The 9R phase originated from lath boundaries with Cu segregation and terminated at the other boundary of the lath. Deformation caused curvature of the lath boundaries and an increase in lath width, promoting the transition of the central 9R phase to nanotwins. This work provides a new route for in situ production of nanotwinned Ti by the laser melting-induced segregation of Cu.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Guhui Gao, Miao Liu, Xiaolu Gui, Jie Hu, Junhua Luan, Zengbao Jiao, Xi Wang, Bingzhe Bai, Zhigang Yang
Summary: The failures of conventional pearlitic rail steels are influenced by the formation of hard and brittle white and brown etching layers (WEL and BEL) on the rail raceway during service. This study reports the formation of a unique multilayer heterostructured WEL/BEL in a field-tested bainitic rail. The WEL is composed of fine-grained martensite or ferrite and retained austenite, while the BEL contains nanocrystalline martensite or ferrite, retained austenite, cementite, and oxide or O-rich particles.
Article
Materials Science, Multidisciplinary
Hao Jie Kong, Tao Yang, Rong Chen, Zengbao Jiao, Tianlong Zhang, Boxuan Cao, Junhua Luan, Shaofei Liu, Anding Wang, Jacob Chih-Ching Huang, Xun-Li Wang, Chain Tsuan Liu
Summary: High-performance, low-cost structural materials with nanoscale precipitations are essential for advanced industry systems. Traditional nucleation mechanisms have limitations in achieving fine dispersion of nanoscale precipitates. However, a revolutionary approach of ultra-strong iron-based alloys has successfully resolved these issues through non-classical nanoscale precipitations and multi-elemental partitioning. This strategy allows for control of nanoscale precipitates with low solute supersaturation, resulting in enhanced strength and ductility, superior fabricability, and post-weld properties.
Article
Engineering, Multidisciplinary
Lu Yang, Chengxia Wei, Dingshan Liang, Feilong Jiang, Zhuo Cheng, Junhua Luan, Zengbao Jiao, Fuzeng Ren
Summary: In this study, the friction and wear behaviors of CoCrNi2(Al0.2Nb0.2) alloy with high-density coherent L1(2) nanoprecipitates during sliding at room and elevated temperatures were systematically investigated. The results showed that the alloy exhibited low wear rate and excellent wear resistance at room temperature, attributed to the precipitation strengthening and dynamic workhardening. At elevated temperature, the reduced wear rates and coefficients of friction were associated with the formation of glaze layer and high resistance to thermal softening. This work provides significant insight into the sliding-induced microstructure evolution and deformation mechanism of L1(2)-strengthened high-entropy alloys during sliding wear.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xingdu Fan, Tao Zhang, Weiming Yang, Junhua Luan, Zengbao Jiao, Hui Li
Summary: The Fe81.3Si4B13-xPxCu1.7 soft magnetic alloys with high Cu and proper P elements addition were synthesized to ensure the amorphous forming ability (AFA) and expand the crystallization window (CW). It was found that an atomic ratio of P/Cu around 3 is advantageous for AFA, and a small amount of P addition promotes the precipitation of alpha-Fe grains. High Cu concentration expands the annealing temperature (Ta) window, while proper P addition enlarges the annealing time (ta) window. The successful synthesis of the Fe81.3Si4B8P5Cu1.7 soft magnetic alloy with a large Ta window of up to 130 degrees C and ta window of 90 min is a breakthrough for nanocrystalline alloys with high saturation magnetization.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Shidong Wang, Jinhua Wang, Yong Yang, Penghui Wang, Shubo Zhang, Junpeng Liu, Zongchang Guo, Hengwei Luan, Chi Zhang, Zengbao Jiao, Zhigang Yang, Gang Sha, Hao Chen
Summary: By tuning the phase stability of interstitial chemically complex alloys (iCCAs), a lath-martensite matrix with a body-centered cubic (bcc) structure was achieved, leading to ultrahigh strength. This alloy design strategy combines the wide chemical composition space and ultrahigh strength of bcc-martensite in steels, providing a new approach for developing high-performance materials.
SCRIPTA MATERIALIA
(2023)
Article
Multidisciplinary Sciences
Tong Li, Tianwei Liu, Shiteng Zhao, Yan Chen, Junhua Luan, Zengbao Jiao, Robert O. Ritchie, Lanhong Dai
Summary: This article presents a method to enhance the strength of tungsten-based high-entropy alloys by stepwise controllable coherent nanoprecipitations (SCCPs), thus overcoming the trade-off between strength and ductility. The coherent interfaces of SCCPs facilitate dislocation transmission and relieve stress concentrations, resulting in an alloy with ultrahigh strength and ductility.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xinghao Wei, Lixin Sun, Zhongwu Zhang, Yang Zhang, Junhua Luan, Zengbao Jiao, Chain Tsuan Liu, Gang Zhao
Summary: In this study, the effects of aging treatments at 500 and 550 degrees C on the impact performance of a Cu precipitation-strengthened steel at a low temperature of -80 degrees C were investigated. The main factor controlling the low-temperature toughness was found to be solute segregation at lath boundaries. Excellent impact performance of -180 J at -80 degrees C, along with high yield strength of -1050 MPa and total elongation of 19%, can be achieved by controlling the segregation of solute elements, specifically Mo and Mn, at the lath boundaries. The evolution of matrix and precipitates during aging treatments and the strengthening and toughening mechanisms were also discussed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
X. F. Gong, Z. H. Gao, L. P. Nie, S. Qiu, Q. Yu, H. Wu, G. P. Zheng, Z. B. Jiao
Summary: This study systematically investigated the effects of 3d, 4d, and 5d transition elements on the phase stability, mechanical properties, and deformation behavior of L12 Co-Ti-based alloys using first-principles calculations. The results showed that certain transition elements tend to occupy specific sites, reducing the structural stability of the alloys. The analysis also revealed that the strengthening of the alloys is attributed to the strong covalent character of the Co-M bonds. The study provides insights into the fundamental understanding of multicomponent L12 compounds and offers guidelines for designing superior Co-based superalloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Multidisciplinary
Chao Hou, Hao Lu, Zhi Zhao, Xintao Huang, Tielong Han, Junhua Luan, Zengbao Jiao, Xiaoyan Song, Zuoren Nie
Summary: The challenge of fabricating nanostructured W-Cu composites has been solved by modulated phase separation. By using intermediary Al, a hierarchically nanostructured W-Cu composite with stable interfaces and high mechanical performance has been achieved.
Article
Materials Science, Multidisciplinary
Wenhao Mao, Lu Yang, Feilong Jiang, Jiangping He, Junhua Luan, Zengbao Jiao, Fuzeng Ren
Summary: Oxide-dispersion-strengthened CoCrNi alloys were synthesized through in situ oxidation and non-in-situ oxidation methods, resulting in Y-ODS and Y2O3-ODS alloys, respectively. Characterizations using TEM and APT revealed that both alloys consisted of an ultrafine-grained fcc matrix, nanoscale Y-Ti-O precipitates, and a small number of (Cr0.75Ti0.25)2O3 oxides. However, the Y-Ti-O precipitates in the two alloys exhibited different phase and microstructure, with Y2TiO5 and Y2Ti2O7 nanoparticles in Y2O3-ODS and Y-ODS alloys, respectively. The Y-ODS alloy displayed an ultrahigh yield strength of 1660 MPa, 320 MPa higher than the Y2O3-ODS alloy, while maintaining the same ductility. Quantitative analysis revealed that the presence of coherent Y2Ti2O7 nanoprecipitates in the Y-ODS alloy contributed to this significant difference in strength. This study provides valuable insights into the design of ODS high/medium-entropy alloys via in situ oxidation during mechanical alloying and consolidation.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
B. C. Zhou, S. F. Liu, H. H. Wu, J. H. Luan, J. M. Guo, T. Yang, Z. B. Jiao
Summary: The effects of Ni and Al contents and ratios on the precipitation, mechanical properties, and deformation behavior of NiAl-strengthened steels were systematically studied. The results show that increasing Ni and Al contents promotes the formation of discontinuous precipitation. The steels with different Ni and Al contents and ratios exhibit high tensile strengths but significantly different ductilities and fracture behaviors. The size of precipitates affects the work hardening capability, with small precipitates enhancing and large precipitates reducing it. Increasing the Ni/Al ratio improves the ductility and fracture behavior of the steels.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
J. X. Hou, J. Y. Zhang, J. X. Zhang, J. H. Luan, Y. X. Wang, B. X. Cao, Y. L. Zhao, Z. B. Jiao, X. J. Liu, W. W. Song, P. K. Liaw, T. Yang
Summary: The precipitation morphologies, coarsening kinetics, elemental partitioning behaviors, grain structures, and tensile properties of L12-strengthened Ni39.9Co20Fe15Cr15Al6Ti4-xNbxB0.1 (x = 0 at.%, 2 at.%, and 4 at.%) high-entropy alloys were investigated. Substituting Ti with Nb resulted in a transition from spheroidal to cuboidal precipitates, increased coarsening kinetics, and phase decomposition at 800°C. Excessive Nb addition led to grain boundary precipitation and phase decomposition from L12 to lamellar-structured D019 phase. Partial substitution of Ti with Nb resulted in a chemically complex and thermally stable L12 phase, ensuring stable phase structure and clean grain boundaries, leading to excellent high-temperature mechanical properties at 700°C.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
