Article
Chemistry, Physical
Edyta Matyja, Krystian Prusik, Maciej Zubko, Grzegorz Dercz
Summary: The Ni45.5Co4.5Mn36.6In13.(4) alloy obtained from pre-alloyed powder through arc melting demonstrates finer sub-grain size and improved mechanical strength compared to the reference sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Dongyang Qin, Feng Zhao, Yulong Li
Summary: In this paper, a homogeneous bimodal Ti-5553 alloy with a prior-beta grain size of 15 μm is successfully fabricated through elaborate thermo-mechanical processing in the alpha+beta field, solution, and aging. The strength and ductility of the alloy are explored at various aging temperatures. The study finds that the achievable yield strength and tensile elongation of the alloy aged at 500 degrees Celsius are 1430 MPa and 9.5%, respectively. The strength of the bimodal alloy aged at 620 degrees Celsius first increases with aging time, reaches a maximum value of 1079 MPa after 2 hours, and then remains constant. Surprisingly, the tensile elongation of the bimodal alloys aged at 620 degrees Celsius is the same as that of the solution-treated alloy. Aging at 700 degrees Celsius does not have a strengthening effect but improves the alloy's ductility. The precipitation kinetics of grain boundary alpha (α(GB)) precipitation is more active than that of intragranular alpha (α(Intra)) precipitation within the aging temperature range of 500 degrees Celsius to 700 degrees Celsius. However, α(GB) precipitation does not contribute to strengthening the alloy. The yield strength of the bimodal Ti-5553 alloy depends on the dislocation density of the beta phase and the size effects of the prior beta grains. The ductility of the alloy is influenced by the plasticity of α(GB) and the stress concentration at the beta/α(Intra) interface. The combination of strength and ductility in the high-strength bimodal Ti-5553 alloy can be further improved by optimizing the thickness of α(GB).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Chenzeng Zhang, Cunguang Chen, Pei Li, Mengjie Yan, Qian Qin, Fang Yang, Wenwen Wang, Zhimeng Guo, Alex A. Volinsky
Summary: Powder metallurgy Cu-30Fe alloy was prepared using mechanical alloying, pressureless sintering, and rolling processes. The rolling process affected the alloy microstructure and physical properties. The Fe particles became elongated and changed shape, while the Cu grains became elongated and refined. The coordinated deformation of the Cu and Fe phases resulted in finer Cu grains near the Fe particles. After annealing, the cold-rolled Cu-30Fe alloy achieved a good combination of mechanical and functional properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jiaying Huang, Siyu Feng, Shiyong Li, Cuilan Wu, Jianghua Chen
Summary: The study systematically investigated the localized corrosion behavior and microstructure of an Al-2.23Cu-0.96Li (wt%) alloy using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that the GPB zones in the alloy do not significantly affect the overall propagation direction of crystallographic corrosion, but are closely related to the formation of nanoscale localized corrosion morphology in the crystallographic corrosion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Kathleen Chou, Emmanuelle A. Marquis
Summary: The presence of interstitial oxygen in aged metastable beta titanium alloys influences the formation of omega and alpha phases, impacting the compressive mechanical properties of the alloy. High oxygen levels result in reduced omega growth rate and induce a shape change for omega precipitates, leading to increased compressive yield strength in specimens with oxygen. Elevated oxygen levels also refine the distribution of alpha precipitates, contributing to an overall increase in compressive yield strength compared to specimens without oxygen.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
J. Shi, Y. W. Zhao, C. L. Jiang, X. Wang, Y. Z. Zhang, D. L. Zou, H. Y. Xu, H. Huang, C. Luo
Summary: By utilizing the theory of mixing enthalpy and atomic-size difference, a uranium-containing high-entropy alloy with excellent compressive plastic properties has been successfully designed. It is found that reducing the average valence electron concentration may lead to high-ductility uranium-containing high-entropy alloys.
Article
Nanoscience & Nanotechnology
Zhao Yang, Chao Xu, Taiki Nakata, Shigeharu Kamado
Summary: This study investigated the effect of extrusion parameters on the microstructural evolution and tensile properties of a Mg-8.0Gd-4.0Y-1.0Mn-0.4Sc alloy. Different DRX mechanisms, such as DDRX and CDRX, were identified, and the alloy with larger extrusion ratio exhibited smaller DRXed grains and a high number of fine precipitated particles. The alloy extruded at 400°C and ratio of 20:1 showed superior strength, while alloy extruded at 450°C and ratio of 10:1 exhibited higher elongation to failure. The enhanced strength was attributed to strong basal texture, refined DRXed grains, and dense distribution of fine particles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Liu Yang, Xiaosong Jiang, Hongliang Sun, Zhenyi Shao, Yongjian Fang, Rui Shu
Summary: The addition of Y elements can significantly reduce the grain size of Cu-11Al-3Ni-2.5Mn alloy and form Y2O3 particles, increasing the tensile strength of the alloy. With a Y content of 1 wt.%, the alloy also exhibits high damping properties, making it promising for potential applications.
Article
Nanoscience & Nanotechnology
C. Ren, K. Sun, Y. F. Jia, N. Z. Zhang, Y. D. Jia, G. Wang
Summary: The study examined the microstructural evolution and mechanical properties of (FeNi)67Cr15Mn10-xAl4Ti4Mox high entropy alloys. It was found that the substitution of Mn by Mo introduced hard a precipitates into the matrix and significantly refined the grains, leading to the increase in yield strength. However, the formation of the hard a precipitates hindered the work hardening process and decreased the plasticity, resulting in a decrease in elongation at break. The highest ultimate tensile stress was obtained at x = 4, where the fracture morphology changed from a coarse grain morphology to a typical brittle fracture. Therefore, (FeNi)67Cr15Mn6Al4Ti4Mo4 showed the optimal mechanical properties overall.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Hiroyuki Watanabe, Toru Murata, Shunsuke Nakamura, Naoko Ikeo, Toshiji Mukai, Koichi Tsuchiya
Summary: Cold-working was found to facilitate the formation of sigma phase in CrMnFeCoNi alloy under specific heat treatment conditions. The resulting sigma-body-centered cubic (BCC) aggregates consist of sigma phase spines and BCC particles, forming rapidly at the face-centered cubic/sigma interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
L. Lu, Q. W. Xia, F. Zhao, J. C. Shi, S. N. Luo, Y. Cai
Summary: By applying high strain-rate plastic deformation treatment using gas gun loading, the mechanical properties of a titanium alloy were modified, resulting in the specimen shocked at 609 m/s exhibiting the best strength-toughness tradeoff.
Article
Chemistry, Physical
F. Belelli, R. Casati, C. Andrianopoli, F. Cuccaro, M. Vedani
Summary: Only a few high strength aluminum alloys can be processed using Laser Powder Bed Fusion due to the occurrence of hot cracks during solidification. The addition of zirconium and scandium in aluminum-magnesium alloys has been proven effective in suppressing solidification cracking and improving strength. Therefore, it is necessary to focus on novel aluminum alloys with enhanced processability and low scandium content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Lingying Ye, Xiaodong Liu, Jianguo Tang, Shengdan Liu, Yong Zhang
Summary: In an Al-Mg-Li alloy, S-1 phase precipitates in rod-shaped morphology at 300 degrees C, which are not dissolved until coarsening is finished at 400 degrees C. The dissolution of small precipitates and spheroidization of the rod-shaped precipitates reduce the total precipitate-matrix interface energy, providing the driving force for coarsening.
Article
Materials Science, Multidisciplinary
Xuebing Hua, Kun Wang, Xian Tong, Jixing Lin
Summary: Zn-1Mg-xZr alloys with different Zr contents were prepared and hot-rolled, and their microstructures, mechanical properties, and corrosion behaviors were systematically assessed. The results showed that the addition of Zr initially increased and subsequently decreased the mechanical strength of the alloys. The Zn-1Mg-0.05Zr alloy exhibited higher mechanical properties and an appropriate corrosion rate for biomedical applications.
Article
Chemistry, Physical
M. Esmaeili Ghayoumabadi, A. G. Mochugovskiy, N. Yu Tabachkova, A. Mikhaylovskaya
Summary: This study aimed to improve the superplastic formability of Alloy AA6013 by refining its grain structure and controlling grain growth at elevated temperatures. Minor additions of Y, Sc, and Zr were considered. The results showed that the additions led to a noticeable refinement of the grain structure and the formation of dispersed particles. These effects inhibited recrystallization and dynamic grain growth, resulting in grain refinement and achieving superplasticity in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(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)