Article
Chemistry, Physical
Xuan Zhou, Keer Li, Dingxuan Zhao, Xu Yue, Rui Li, Jixiong Liu, Xiaoxiang Wang, Wei Chen, Jinyu Zhang, Jun Sun
Summary: This study systematically investigated the mechanical properties and fracture characteristics of Ti-2.5Cu alpha-titanium alloy under cryogenic conditions. The results showed that the low-temperature samples exhibited higher strength and ductility, with a different fracture surface morphology. These properties and characteristics are closely associated with deformation twinning.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
D. W. Ding, Jing Tan, A. H. Cai, Y. Liu, H. Wu, Q. An, P. W. Li, Yan Zhang, Qing Yang
Summary: This study systematically investigated the effects of Ti microalloying on the glass forming ability, physical, and chemical properties of Zr-based bulk metallic glasses. It was found that the addition of 0.3at% Ti had the greatest impact on the glass forming ability and mechanical properties. Ti lowered the glass transition temperature, increased plasticity and strength, and influenced the corrosion behavior, leading to increased pitting corrosion severity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Yuankui Cao, Na Li, Yaofeng Luo, Hanchun Tang, Qian Xie, Ao Fu
Summary: A novel Ti-3Al-5V-5Mo alloy with hierarchical submicron alpha precipitates and nanoscale alpha' precipitates was developed, which exhibited an ultra-high tensile strength of 1585 MPa and moderate plasticity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Yingchao Zhang, Renbo Song, Yongjin Wang, Changhong Cai, Ping Yu, Zhiyang Zhao, Chunyang Hu
Summary: The study investigated the precipitation evolution and mechanical properties of Fe-3Si-2Cu silicon steel, revealing that the precipitation of ε-Cu simultaneously increased the yield strength, tensile strength, and elongation. The reconciliation of strength and toughness was attributed to the disordered interface between ε-Cu and the matrix hindering dislocations, along with the essential softness of ε-Cu enhancing toughness. This paper provides significant insights into the mechanism of strengthening and toughening by nano-sized ε-Cu.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Lu Zhang, Li Zhang, Hao Wang, Jianbo Li, Jiale Man, Zaidong Xu, Jianxin Yu, Gang Wan, Wei Wang, Baolin Wu
Summary: This study examined the evolution of microstructure and mechanical properties of a high-entropy alloy and provided valuable insights on predicting sigma-phase formation in alloy design. Interaction between alloying elements and principal elements can affect recrystallization, leading to formation of partially recrystallized microstructures across a wider temperature range. Control of the proportion of recrystallized and non-recrystallized grains is crucial in managing strength and ductility, with factors like sigma particles and deformation twinning influencing alloy characteristics.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hongchao Li, Jun Wang, Haoxue Yang, Mengmeng Zhao, William Yi Wang, Ruihao Yuan, Jinshan Li
Summary: This study investigated the effect of thermomechanical treatments on the mechanical properties of high-entropy alloy Al0.5CoCrFeNi. The results showed that the nanoscale B2 phases formed through aging significantly enhanced the strength of the alloy, and pre-deformation facilitated the formation of B2 phases and further improved the strength of the alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Li Jianbo, Wan Gang, Wu Bo, Xu Zaidong, Man Jiale, Zhang Lu, Wu Baolin
Summary: A bcc-structured Ti2ZrNbV high entropy alloy was prepared and its solid solution phase stability was studied. The precipitation of V Zr-2 phase was found to improve the tensile property of the alloy. The alloy exhibited a stable homogenous solid solution phase above 900 degrees C and the precipitation of Laves phase V Zr-2 occurred at lower temperatures. After solid solution and aging treatment, the alloy showed a tensile yield strength of 1145 MPa and an elongation of 8.3%.
RARE METAL MATERIALS AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xueyin Bai, Minqian Liu, Shujie Pang, Huaping Xiong, Xinyu Ren, Haishui Ren, Tao Zhang
Summary: Novel Ti-based amorphous/nanocrystalline alloys with low liquidus temperatures were developed as brazing filler metals to enhance the mechanical properties of titanium alloy brazed joints. The joints brazed with Ti-Zr-Co-Cu-V(Al) fillers showed improved tensile shear strength and impact toughness compared to those brazed with Ti-Zr-Co-Cu-Sn fillers. The Ti-Zr-Co-Cu-Al amorphous/nanocrystalline filler is a promising brazing material for joining titanium alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Fangjie Li, Yeyu Sha, Jiuxiao Li, Dongye Yang, Xin Zeng, Xie Zhou, Qin Shen, Min Liu
Summary: This study investigates the influence of recrystallisation and sigma phase precipitation on the mechanical properties of an equiatomic CoFeNiMnV high-entropy alloy. The results show that V is more effective than Cr in stabilising the sigma phase. Sigma phase precipitation occurs before recrystallisation during the annealing process. The combined effect of sigma phase precipitation strengthening and recrystallisation softening affects the mechanical behaviour of the alloy. The strength decreases with increasing annealing temperature, attributed to increased recrystallisation percentage.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Manufacturing
Yukyeong Lee, Shuanglei Li, Eun Seong Kim, Dong Jun Lee, Jae Bok Seol, Hyokyung Sung, Hyoung Seop Kim, Taekyung Lee, Jung Seok Oh, Tae-Hyun Nam, Jung Gi Kim
Summary: Adjusting the phase transformation behavior in metallic alloys is important for controlling both the strengthening capability and the shape memory effect. This study investigates the transformation-induced plasticity in a heterogeneous microstructured Ti-Zr-Nb-Sn alloy. The results show that the design of a heterogeneous microstructure helps manipulate phase transformation in specific areas and improves the material's strength.
ADDITIVE MANUFACTURING
(2022)
Article
Metallurgy & Metallurgical Engineering
Quan Wen, Wenya Li, Vivek Patel, Luciano Bergmann, Benjamin Klusemann, Jorge F. dos Santos
Summary: The study focused on the bonding interface characteristics and mechanical properties of bobbin tool friction stir welded dissimilar AA6056 and AA2219 aluminum alloy joints using different welding speeds. It was found that increasing welding speed did not significantly change material mixing in the middle section compared to the bottom section of the bonding interface. Differences in hardness between the Guinier-Preston dissolution and Q-phase precipitation contributed to the rare change in hardness in the heat affected zone (HAZ) at the AA6056 side. Increased hardness in the HAZ at the AA2219 side was attributed to the avoidance of theta '' phase precipitates dissolution.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
M. V. Nataraj, S. Swaroop
Summary: This study investigates the micro structural changes of Ti-2.5 Cu after laser peening with different laser intensities. XRD, EBSD, and TEM were used to analyze the microstructure. XPS was used to characterize the oxidation behavior of the samples. The results showed an increase in compressive residual stress and improved micro hardness with increasing laser intensity. TEM studies revealed nano precipitates, mechanical twins, and dislocation structures. EBSD results confirmed the formation of high angle grain boundaries and mechanical twins at higher laser energy.
Article
Chemistry, Physical
Shuaijiang Yan, Richu Wang, Chaoqun Peng, Zhiyong Cai, Jian Peng
Summary: The 7055-Mg alloy with higher Mg content showed significantly improved mechanical strength compared to the 7055 alloy doped with other elements and particles. The addition of 1 wt.% Mg promoted the precipitation of eta' phase, leading to a finer grain size and more uniform microstructure. Post heat treatment allowed for tailoring the volume fractions and sizes of eta' phases, optimizing the mechanical properties of the samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Scott Sneddon, Daniel M. Mulvihill, Euan Wielewski, Mark Dixon, David Rugg, Peifeng Li
Summary: The titanium alloy Ti407 exhibits lower strength but significantly higher ductility compared to Ti64, attributed to its reduced aluminum content allowing for additional dislocation motion. Ti407 is more sensitive to texturing under applied stress, showing greater grain elongation and rotation compared to Ti64. Its ability to accommodate more deformation before failure will lead to improved impact energy absorption performance, machinability, and potentially lower manufacturing costs.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Minseok Gwak, Soyoung Kim, Dong Jun Lee, Jae Bok Seol, Hyokyung Sung, Tae-Hyun Nam, Sangshik Kim, Jung Gi Kim
Summary: This study investigates the effect of post-annealing on the microstructural evolution and mechanical properties of an additively manufactured Ti-6Al-4V alloy. The annealing conditions induce changes in the alloy's microstructure, resulting in a reduction in strength and an increase in ductility. Additionally, the tensile testing temperature affects the activity of the slip system in the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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)