Article
Materials Science, Multidisciplinary
Jun-Hyoung Park, Sung-Hoon Kim, Seung-Gyun Kim, Hyung-Wook Kim, Jae-Chul Lee
Summary: The study focuses on producing Al-xMg alloys with high strength and ductility at cryogenic temperatures, achieved through a combination of thermo-mechanical treatment. Gradual addition of Mg significantly improves the cryogenic tensile properties of the alloys. Comparing Al-xMg alloys with different Mg contents provides insights into enhancing these properties for applications at cryogenic temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Ranming Niu, Xianghai An, Linlin Li, Zhefeng Zhang, Yiu-Wing Mai, Xiaozhou Liao
Summary: By adjusting the Al content in Cu-Al alloys to control stacking fault energy (SFE), the mechanical properties and deformation mechanisms of the materials can be manipulated. The study revealed that the influence of sample size on strength decreased with decreasing SFE or increasing Al content, and a theoretical model was proposed to explain this size dependency.
Article
Nanoscience & Nanotechnology
Chengbin Wei, Yiping Lu, Xinghao Du, Tingju Li, Tongmin Wang, Peter K. Liaw
Summary: The non-equiatomic Co29Cr29Fe29Ni12.5W0.5 high-entropy alloy exhibited exceptional strength-ductility synergy at cryogenic temperatures, with significant increase in yield strength and outstanding ductility. The microstructure transformed to a hexagonal-close packed phase at low temperatures, contributing to the high mechanical properties observed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Peter J. Blau
Summary: Sliding wear damage on non-lubricated metallic bearing surfaces is caused by the dissipation of frictional work, presenting different damage features depending on alloy-specific deformation modes and microstructural properties. Metal pairs with similar friction coefficients may not wear equally due to differences in energy partition. The transition in wear mechanisms is influenced by composition and surface processing methods.
Article
Materials Science, Multidisciplinary
Huan Liu, Bo Gao, Yi Yang, Mengning Xu, Xingfu Li, Cong Li, Hongjiang Pan, Jingran Yang, Hao Zhou, Xinkun Zhu, Yuntian Zhu
Summary: Nanocrystallization can improve the strength and hardness of metallic materials, but sacrifice ductility. Heterostructured materials with outstanding work hardening capability offer a solution. In this study, a gradient structured Cu-Al alloy was produced through surface mechanical attrition treatment (SMAT). The alloy exhibited increased yield strength and maintained high ductility. Low stacking fault energy played a significant role in enhancing strain hardening.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
G. Kamalakshi, Prita Pant, M. P. Gururajan
Summary: This study uses Molecular Dynamics (MD) simulations to show anomalous softening in Cu-Al alloys. In addition to heterogeneous nucleation at solute sites, the reduction in stacking fault energy with alloying addition promotes the nucleation of partial dislocation loops.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
W. X. Zhang, Y. Z. Chen, L. Zhou, T. T. Zhao, W. Y. Wang, F. Liu, X. X. Huang
Summary: Si is a common alloying element in Al alloys, mainly used to form precipitates and improve castability. In this study, the effect of Si as a solute on work hardening and dislocation behaviors of Al-Si alloys was investigated. It was found that the addition of Si increased the tensile strength and ductility of the alloys, with higher Si concentrations resulting in greater improvements. The enhanced work hardening was attributed to the change in dislocation configuration and the weakening of stacking-fault energy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Naveen Manhar Chavan, P. Sudharshan Phani, M. Ramakrishna, L. Venkatesh, Prita Pant, G. Sundararajan
Summary: Cold spray deposition involves unique combination of high strain rate and moderate to high strain deformation, leading to significant grain refinement and deformation twinning in Cu and Cu-Al alloys. Experimental observations align well with theoretical predictions, showing significant heterogeneity in cold spray coatings and identifying factors influencing hardness. Twin mediated deformation mechanism is found to explain the lower boundary strengthening in presence of fine twins.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Y. A. Sun, Z. P. Luo, X. Y. Li, K. Lu
Summary: This study investigates the effects of stacking fault energy (SFE) on grain boundary relaxation and thermal stability in Cu-Ni and Cu-Al alloys. It is found that the thermal stability decreases with decreasing grain size, but there are two different grain size dependencies below 70 nm. The behavior of grain boundary relaxation depends on the SFE of the alloy.
Article
Chemistry, Physical
S. Paul, R. Saha, P. P. Bhattacharjee
Summary: The effect of heavy cryo-rolling (CryoR) on a Co20Cr26Fe20Mn20Ni14 high entropy alloy (HEA) with an extremely low stacking fault energy (SFE) was investigated. CryoR resulted in the formation of various microstructural features and a deformation-induced nano-lamellar structure. The nano-grain size achieved after CryoR was smaller than other low SFE alloys. Annealing resulted in recrystallization and dissolution of Cr-rich precipitates, and the presence of these precipitates inhibited grain growth up to 950 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
S. Paul, B. Tripathy, R. Saha, P. P. Bhattacharjee
Summary: This study investigated the microstructure and crystallographic texture of an extremely low stacking fault energy high entropy alloy. Various changes and phase transformations were observed during heavy cold-rolling and annealing processes. The annealing texture showed remarkable resemblance with other low stacking fault energy alloys, and the suitably annealed alloy exhibited appreciable strength-ductility balance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Wei Liu, Dan Liu, Xuejiao Wang, Yucheng Wu, Junwei Qiao
Summary: The high-entropy alloy with titanium additions demonstrates outstanding strength and ductility at room temperature and low temperature. The increase in ductility at low temperature is attributed to the decrease in stacking fault energy, resulting in a change in deformation mechanism from dislocation wave slip to plane slip. Precipitation strengthening and grain boundary strengthening induced by chrome-rich sigma precipitates contribute to the overall strength.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Carlyn R. LaRosa, Maryam Ghazisaeidi
Summary: A simple bond energy model is proposed to accurately predict the average stacking fault energy (SFE) in concentrated solid-solution alloys. The SFE is approximated using the energy difference of relevant bulk phases, and the bond energies are used to determine the SFE distribution within a given alloy system, avoiding the computational cost and limitations of stacking fault supercell calculations.
Article
Chemistry, Physical
J. F. Zou, Raymond Kwesi Nutor, Q. P. Cao, X. D. Wang, S. Q. Ding, D. X. Zhang, Z. W. Dai, J. Z. Jiang
Summary: This study proposes a strategy for developing an fcc-structured Co-rich Co40Fe25V20Ni15 HEA by incorporating V instead of Cr, which exhibits solid-solution strength and a high grain boundary strengthening effect. Addition of Al enhances the mechanical performance of the alloy through precipitation-strengthening effects, showing comparable properties to Ni-based superalloys. This research further demonstrates the importance of utilizing V and Al in developing high-performance alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Sayed Amer, Ruslan Barkov, Andrey Pozdniakov
Summary: The microstructure of Al-Cu-Yb and Al-Cu-Gd alloys in different states was observed and the effects of annealing on microstructure, mechanical properties, and forming properties were studied. The research revealed different recrystallization starting temperatures for the alloys within specific temperature ranges, and annealing resulted in reduced hardness and tensile properties of the alloys.
Article
Materials Science, Multidisciplinary
V. D. Sitdikov, L. I. Zaynullina, K. X. Wei, W. Wei, I. V. Alexandrov
MATERIALS CHARACTERIZATION
(2019)
Article
Materials Science, Multidisciplinary
Kun Xia Wei, Zhu Qi Chu, Wei Wei, Qing Bo Du, Igor V. Alexandrov, Jing Hu
ADVANCED ENGINEERING MATERIALS
(2019)
Article
Materials Science, Coatings & Films
Dong Li, Jiqiang Wu, Bin Miao, Xiaobing Zhao, Changjun Mao, Wei Wei, Jing Hu
SURFACE ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Feilong Jia, Kun Xia Wei, Wei Wei, Qing Bo Du, Igor V. Alexandrov, Jing Hu
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Article
Materials Science, Coatings & Films
Min Li, Kun Xia, Wei Wei, Qing Bo Du, Xiao Bing Zhao, Jing Hu
SURFACE ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Kun Xia Wei, Zhu Qi Chu, Li Chen Yang, Wei Wei, Qing Bo Du, Igor V. Alexandrov, Jing Hu
Summary: The study combined ECAP and DCT techniques to manufacture copper electrodes and investigated their effects on EDM performance. The results showed that electrodes processed by ECAP+DCT could improve the surface roughness of EDM workpieces, reduce the electrode wear rate, and enhance the workpiece corner sharpness.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Fei Long Jia, Kun Xia Wei, Wei Wei, Fu Qiang Chu, Qing Bo Du, Igor Alexandrov, Jing Hu
Summary: The microstructure, thermal conductivity, and tensile properties of copper foils are significantly influenced by the presence of few-layer graphene nanoplates (FLGNPs) in the Cu matrix. The Cu-FLGNPs composites deposited through electrodeposition showed an increase in thermal conductivity and tensile strength initially, followed by a decrease. The enhancement in thermal conductivity and tensile strength was attributed to factors like graphene defects, electron scattering, phonon scattering, and interfacial thermal resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Chemistry, Physical
Kun Xia Wei, Hao Ran Zhou, Fei Long Jia, Ke Zhang, Wei Wei, Fu Qiang Chu, Dan Dan Wang, Igor V. Alexandrov
Summary: Graphene/copper composite foils were fabricated via pulse electrodeposition with graphene nanoplates dispersed in copper matrix. The variation of graphene concentration in the composite foils affected their tensile strength and hardness.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Shao Peng Wang, Kun Xia Wei, Wei Wei, Qing Bo Du, Igor V. Alexandrov
Summary: Developing copper foils with low surface roughness, high tensile strength, and good thermal conductivity is crucial in electronic equipment communication. This study investigates the effect of several additives on the surface roughness, tensile strength, and thermal conductivity of copper foils. The results show that the composite additive Tu-PAM exhibits better modification effect on copper foils.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Xulong An, Chenglin Chu, Wenwen Sun, Wei Wei
Summary: This study investigates the changes in texture and mechanical properties of CoNiFeV0.5Mo0.2 medium entropy alloy wire rods during loading-unloading. The results show that the intensity of the recrystallization texture and the fraction of low angle grains increase with the loading-unloading cycles, leading to an increase in alloy strength. The loading modulus and average modulus slightly decrease, while the unloading modulus increases.
Article
Materials Science, Multidisciplinary
Kun Xia Wei, Xin Chen Zheng, Wei Wei, Igor V. Alexandrov
Summary: In this research, graphene/copper foils (GrCFs) were fabricated by direct current electrodeposition to investigate the impact of mechanical agitating rate on their structure and properties. The results showed that under specific conditions, the minimum surface roughness and maximum tensile strength of GrCFs could be achieved simultaneously.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Chemistry, Physical
Xulong An, Zhengdi Liu, Yong Zhang, Wei Wei, Jing Bai, Zhengxiang Xu, Jing Hu, Kunxia Wei, Chenglin Chu, Wenwen Sun
Summary: This study presents a revised microstructural design method for multi-principal element alloys, which can increase the yield strength and tensile strength while maintaining good ductility at room temperature. The findings highlight the importance of properly tuning the fractions of different phases in order to improve the performance of these alloys.
Article
Chemistry, Physical
Hui Qing Xu, Kun Xia Wei, Wei Wei, Jan Dzugan, Igor V. Alexandrov, Xu Long An, Dan Dan Wang, Xiang Kui Liu, Matej Daniel, David Hradil, Qiang Chen
Summary: The evolution of microstructure and properties of Ti-13 Nb-13Zr alloy was investigated in different material states. The results indicate that ECAP-Conform + RS treatment can significantly refine the grain size and improve the mechanical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhu Qi Chu, Kun Xia Wei, Li Chen Yang, Wei Wei, Qing Bo Du, Igor Alexandrov, Jing Hu
ACTA METALLURGICA SLOVACA
(2020)
Article
Nanoscience & Nanotechnology
Kun Xia Wei, Fei Long Jia, Wei Wei, Hao Ran Zhou, Fu Qiang Chu, Qing Bo Du, Igor Alexandrov, Jing Hu
ACS APPLIED NANO MATERIALS
(2020)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)