Article
Materials Science, Multidisciplinary
Jiwu Huang, Chenglong Xu, Shichao Liu, Fuqing Jiang
Summary: This paper investigates a novel Al-Zn-Mg-Cu-Mn-Sc-Zr alloy with excellent quenching sensitivity and a quench-hardening depth of more than 150 mm. Different quenching rates affect the hardness of the alloy, and after artificial aging, various precipitates are observed on the grain boundaries and different phase interfaces.
Article
Chemistry, Physical
Ding-Ding Lu, Hong Ning, Yue Du, Jin-Feng Li, Dan-Yang Liu, You-Jie Guo, Yong-Lai Chen, Xu-Hu Zhang, Wen You, Kai Zhang, Rui-Feng Zhang
Summary: The quench sensitivity of 2050 Al-Cu-Li alloy was studied using TTT and TTP curves, as well as a novel end quenching test for 2 mm cold-rolled sheets. The main factors affecting quench sensitivity were found to be the precipitation and coarsening of Cu-rich phases during quenching, leading to uneven distribution of precipitates and decreased mechanical properties. The influence of precipitate free zones on elongation during end quenching test was clarified, identifying a high quench sensitive temperature zone of 260 to 440 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yuan Yin, Bing-Hui Luo, Zhen-Hai Bai, Hui-Bo Jing
Summary: The quench sensitivity of Al-Cu-Mg alloy was examined at different thicknesses of the thick plate. A finite element analysis was used to simulate the quenching process, and the resulting time-temperature-property and time-temperature-transformation curves were obtained through hardness tests and differential scanning calorimetry. Microstructural observation was conducted using scanning electron microscopy and transmission electron microscopy. The experimental results showed that the quench cooling rate decreases from the surface to the center of the plate, leading to inhomogeneous microstructure and a decrease in S-phase and an increase in T-phase, which was consistent with the analysis of the time-temperature-property and time-temperature-transformation curves.
Article
Metallurgy & Metallurgical Engineering
Ying-hao Peng, Chong-yu Liu, Li-li Wei, Hong-jie Jiang, Zhen-jiang Ge
Summary: The study found that 7xxx aluminum alloys with high zinc content and Sc addition exhibit higher hardness and increased quench sensitivity. Increasing zinc and copper content leads to higher density of eta and T phases, while Sc addition promotes the formation of Y phase and more eta phases. Compared to the 7085 alloy, simultaneous increase in zinc content and decrease in copper content can enhance hardness and reduce quench sensitivity.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Gloria Graf, Petra Spoerk-Erdely, Peter Staron, Andreas Stark, Fransisca Mendez Martin, Helmut Clemens, Thomas Klein
Summary: This study investigates the quench rate sensitivity of an Al-Mg-Zn-Cu alloy with a low Zn/Mg ratio and compares it to a commercial reference Al-Zn-Mg-Cu alloy with a high Zn/Mg ratio. The results show that the alloy with a low Zn/Mg ratio exhibits lower quench rate sensitivity and robust precipitation behavior, which can be beneficial for advanced manufacturing processes.
Article
Nanoscience & Nanotechnology
Dingling Yuan, Kanghua Chen, Songyi Chen, Lanping Huang, Geng Chen, Sijun Chen
Summary: The study investigates the synergy effect of quench rate and pre-strain on the microstructure, stress corrosion cracking resistance, and mechanical property of a low-Cu Al-Zn-Mg-Cu alloy. The results show that pre-strain and slow quench rate significantly improve SCC resistance due to the characteristics of grain boundary precipitates. Additionally, pre-strain is more effective in improving SCC resistance in fast-quenched samples compared to slowly quenched samples.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Shichao Liu, Guofu Xu, Yao Li, Liansheng Huang, Lei Tang, Xiaoyan Peng
Summary: The Zn/Mg ratio has a significant influence on the precipitate behavior and mechanical properties of Al-Zn-Mg-Cu alloys, with hardness and strength decreasing as the quenching distance increases. Alloys with a higher Zn/Mg ratio exhibit fewer equilibrium eta phases during slow quenching, leading to reduced quench sensitivity.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Menghan Zhang, Chengbo Li, Yong Zhang, Shengdan Liu, Jingyu Jiang, Jianguo Tang, Lingying Ye, Xinming Zhang
Summary: The study found that the alloy after hot deformation has a different microstructure compared to the one without hot deformation, with more recrystallized grains and subgrains, accompanied by a higher amount of quenching-induced phases. Furthermore, it was observed that hot deformation has a significant impact on the microstructure and precipitation behavior of the alloy.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Dan-yang Liu, Yun-long Ma, Jin-feng Li, Chen Liu, Yue Du, Yong-lai Chen, Xu-hu Zhang, Wen You, Rui-feng Zhang
Summary: The study investigated the quench sensitivity and time-temperature-transformation curves of the 2060 Al-Cu-Li alloy, finding a quenching depth of approximately 24 mm and a sensitivity range of 260-440 degrees C. The higher quench sensitivity was related to a greater quantity of the Al-Cu phase containing Zn.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Yong Li, Yin Wang, Bing Lu, Wei Yu, Haiyao Wang, Guangming Xu, Zhaodong Wang
Summary: Al-Zn-Mg-Cu alloys were prepared using water-cooled copper casting and characterized by various microstructural analysis techniques. The study demonstrated that increased Cu content enhanced solid solution strengthening and precipitation strengthening, while higher Zn/Mg ratio decreased precipitation strengthening and resulted in decreased strength but increased plasticity of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Tse-An Pan, Yu-Chih Tzeng, Hui-Yun Bor, Kuang-Hui Liu, Sheng-Long Lee
Summary: The study found that the coherency of Al3Zr particles in Al-Zn-Mg-Cu alloys affects their quench sensitivity. A higher cold-rolling ratio led to a semi-coherent interface between Al3Zr particles and the matrix after solution treatment, resulting in increased quench sensitivity. Alloys without Zr showed coarser grain sizes and higher recrystallization fractions, regardless of the cold-rolling ratio.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Chen Li, Guiyue Che, Wenlong Xiao, Chenyang Zang, Xinquan Zhang, Yu Fu, Chaoli Ma
Summary: The microstructure and properties of a high Zn-containing Al-Zn-Cu-Mg (7065) aluminum alloy pre-stretched plates were investigated before and after two-stage aging treatment. The results showed that dynamic recrystallization was observed near the surface and led to heterogeneous texture and dislocation density in the thick direction. After aging treatment, fine and dispersive precipitates were found at H/2 of the 50-mm plate. The primary precipitation strengthening pattern was the precipitation shearing mechanism. The tensile strength and elongation were around 550 MPa and 15%, respectively. The electrical conductivity increased by approximately 30% compared to the peak aging state, with a slight reduction in hardness. The abnormal anisotropy of mechanical properties in different directions was related to the number of Cube textures and the orientation of refractory particles.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yan Zou, Xiaodong Wu, Songbai Tang, Qianqian Zhu, Hui Song, Mingxing Guo, Lingfei Cao
Summary: The study investigated the effects of Zn/Mg ratios on the microstructure and mechanical properties of Al-Zn-Mg-Cu alloys aged at 150 degrees C. It was found that an increase in Zn/Mg ratios significantly accelerates the aging process, with the co-existence of T' phase and eta' phase beneficial to the high strength of the alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Rensong Huang, Hongfu Yang, Peng Sun, Shanju Zheng, Mengnie Li, Yonghua Duan
Summary: This study investigated the influence of Mg content on the microstructure and corrosion behavior of homogenized Al-Zn-Mg-Cu alloys. The findings showed that alloys with moderate Mg content exhibited significantly lower corrosion rate and depth. These findings are important for enhancing the corrosion resistance of the alloys.
Article
Materials Science, Multidisciplinary
J. G. Jeon, Sangjun Lee, K. M. Choi, H. Kang, W. C. Kim, J. H. Jeon, D. H. Bae
Summary: The recrystallization behavior of cold-rolled Al-Zn-Mg-Cu-based alloy sheets was studied, and it was found that the grain size decreased with increasing Cu and Mg contents due to the reduced ratio of microscale particle size to volume fraction. The sensitivity of different particles to particle-stimulated nucleation (PSN) varied depending on their morphologies and relative fractions. The addition of Cu and Mg had different effects on the PSN, resulting in different linear experimental coefficients (k).
METALS AND MATERIALS INTERNATIONAL
(2023)
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)