Article
Chemistry, Physical
P. Emadi, B. Andilab, K. Borodianskiy, C. Ravindran
Summary: The use of lightweight alloys, such as magnesium, is crucial for improving fuel efficiency and reducing emissions in automobiles, as well as increasing the range of electric vehicles. This study investigated the effects of SiC nanoparticles on the microstructure and mechanical properties of Mg-Al-Zn-Mn alloy composites. The addition of SiC resulted in significant grain refinement, more uniform phase dispersion, and improved tensile strength, making it a promising material for strengthening light alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yifan Bu, Xiuzhen Zhang, Dengshan Zhou
Summary: Experimental observations show that the strain dependence of the Hall-Petch slope in Al-Mg alloys is significantly influenced by the formation of Laders bands and the Mg content. The Hall-Petch slope initially drops due to Laders deformation, then increases with plastic strain until reaching its maximum, and subsequently decreases due to dynamic recovery. Alloys with higher Mg contents exhibit a larger Hall-Petch slope at a given strain, and their dynamic recovery is postponed until a larger strain is reached. Interestingly, a model developed for low stacking fault energy materials accurately describes the relationship between the Hall-Petch slope, Mg content, and strain magnitude.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, David N. Seidman, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The research revealed that the formation and evolution of GPI and GPII zones during natural aging had a significant impact on the mechanical properties of the Al-7.6Zn-2.7Mg-2.0Cu-0.1Zr-0.07Ti alloy. The Zn/Mg atomic ratio, mean radius, number density, and volume fraction of the GP zones also played crucial roles in influencing the mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Ruixiao Zheng, Wu Gong, Jun-ping Du, Si Gao, Maowen Liu, Guodong Li, Takuro Kawasaki, Stefanus Harjo, Chaoli Ma, Shigenobu Ogata, Nobuhiro Tsuji
Summary: This study reveals that the softening effect caused by grain boundary sliding can be reversed and the Hall-Petch strengthening can be regained through grain refinement in ultrafine grained pure Mg at cryogenic temperature. The UFG Mg exhibits ultrahigh tensile strength but significantly reduced ductility at 77K.
Article
Chemistry, Physical
Hyo-Sun Jang, Donghyuk Seol, Byeong-Joo Lee
Summary: This study investigates the effect of alloying elements on the recrystallization behavior of magnesium alloys. It is found that grain boundary segregation and solute clustering in solid solutions can affect grain boundary migration, leading to changes in recrystallization behavior. Solute clusters in Mg-Zn-Ca alloys have a stronger dragging effect on grain boundaries compared to Mg-Al-Zn alloys, providing another explanation for the changes in recrystallization behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Xuefeng Lu, Wei Zhang, Xin Guo, Xu Yang, Junchen Li, Junqiang Ren, Hongtao Xue, Fuling Tang
Summary: Grain boundary plasticity dominates the mechanical behavior of materials, and the introduction of nanotwins can achieve coordination between strength and ductility in metals and alloys. In this study, nanotwins with different volume contents are introduced in NiCoAl alloys to explore the strengthening mechanism under the Hall-Petch effect. The results indicate that the introduction of nanotwins effectively inhibits grain boundary migration and grain combination, improves the strength of the alloy, and changes the strengthening mechanism from dislocation movement, grain boundary migration, and deformation twinning to the dual strengthening of local dislocation movement and Lomer-Cottrell locks.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
L. Zhang, C. Y. Liu, H. Y. Xie
Summary: Al-Mg-Sc alloys with fine equiaxed grain structure and free of Mg segregation and dislocations were fabricated using friction stir processing and post-solution treatment. The deformation behavior of these alloys at different temperatures was studied. The k-value in the Hall-Petch equation increased with increasing Mg content, and the equation relating k-values to Mg content was established. Grain refinement and high Mg content were found to enhance the high-temperature deformation capabilities of the alloys.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Manufacturing
Rui Fu, Wenjun Lu, Yueling Guo, Hongshuai Lei, Yinan Cui, Jiarong Wang, Di Gao, Jiachen Wang, Changmeng Liu
Summary: Through hot-wire arc additive manufacturing (HWAAM) technology, the microstructure and mechanical properties of Al-Zn-Mg-Cu alloy were improved. The alloy samples had equiaxed grains and low porosity, crack-free parts were obtained after heat treatment, and acceptable mechanical properties were achieved.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Mengchu Yang, Shengdan Liu, Yong Zhang, Jianguo Tang, Mengchao Zhang
Summary: The mechanism of precipitation strengthening in copper-containing aluminum alloys was investigated using various techniques. It was found that the addition of copper increased the strength of the alloys, primarily due to the contribution of clusters in the precipitation strengthening.
MATERIALS & DESIGN
(2023)
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
A. Jagetia, M. S. K. K. Y. Nartu, S. Dasari, A. Sharma, B. Gwalani, R. Banerjee
Summary: This study reports a significant increase in the Hall-Petch coefficient (K) when Al is added to CoFeNi/CoCrFeNi alloys, attributed to ordering mediated nano-clustering in Al-containing HEA/CCAs. The increase in grain boundary strengthening is rationalized by the presence of Ni-Al rich nano-clusters, elucidated through atom probe tomography, which necessitate additional stress for overcoming coherency strain fields.
MATERIALS RESEARCH LETTERS
(2021)
Article
Metallurgy & Metallurgical Engineering
Lei Liu, Xiaojie Zhou, Shilun Yu, Jian Zhang, Xianzheng Lu, Xin Shu, Zaijun Su
Summary: The effects of different treatments on the microstructure and mechanical properties of an extruded Mg-4.3Gd-3.2Y-1.2Zn-0.5Zr alloy were investigated. The study found that grain growth, texture changes, and stability of LPSO phases have an impact on the alloy's properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Frederic Sansoz, Xing Ke
Summary: The breakdown of grain-size strengthening to softening mechanisms in nanocrystalline alloys, particularly with regards to grain-boundary solute segregation, has been investigated through large-scale simulations. Three concentration-dependent regimes of plasticity were identified, including classical segregation strengthening, shear band-induced softening, and a previously unknown plateau of maximum strengths for intermediate solute contents. The findings highlight the complex roles of solute segregation and interfacial plasticity mechanisms in nanocrystalline alloys.
Article
Nanoscience & Nanotechnology
Pan Tan, Jin Qin, Xiang Quan, Danqing Yi, Bin Wang
Summary: The effects of the Zn/Mg ratio on the microstructure, aging behavior, and mechanical properties of cast Al-Cu-Zn-Mg alloys were investigated. The Zn/Mg ratio influenced the primary phase in the as-cast alloy, the density of S phases in the peak-aged alloy, and the types of major precipitates. The cooperative strengthening of various phases improved the yield strength, ultimate tensile strength, and elongation of the alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Reza Alizadeh, Jingya Wang, Javier LLorca
Summary: The mechanical properties of Mg-4wt.% Zn alloy single crystals were investigated through micropillar compression testing, revealing that pyramidal slip in precipitation hardened alloy leads to homogeneous deformation and strong hardening. The presence of rod-shape precipitates perpendicular to the basal plane significantly reduces the plastic anisotropy of Mg.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Zhong-Zheng Jin, Xiu-Ming Cheng, Min Zha, Jian Rong, Hang Zhang, Jin-Guo Wang, Cheng Wang, Zhi-Gang Li, Hui-Yuan Wang
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Zhong-Zheng Jin, Min Zha, Hai-Long Jia, Pin-Kui Ma, Si-Qing Wang, Jia-Wei Liang, Hui-Yuan Wang
Summary: The utilization of SRS combined with HPR process has led to an increase in elongation with maintained tensile strength in Mg-6Zn-0.2Ca alloy. The refined grain structure and eutectic phase, along with the presence of excessive Ca solute atoms, contribute to the enhanced ductility and strain-hardening ability of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Review
Metallurgy & Metallurgical Engineering
Zhong-Zheng Jin, Min Zha, Si-Qing Wang, Shi-Chao Wang, Cheng Wang, Hai-Long Jia, Hui-Yuan Wang
Summary: Magnesium alloys show promising potential as lightweight structural materials in transportation and aerospace fields due to their low density and high specific strength. However, most high-strength magnesium alloys exhibit poor formability and ductility at room temperature, limiting their applications. Recent research has focused on enhancing the ductility of magnesium alloys through alloying design strategies and microstructural control using advanced processing technologies.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
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)