Article
Chemistry, Physical
Rong Kong, Bao Meng, Xin Ma, Youchun Li, Lihuang Zheng, Yu Zhu, Min Wan
Summary: The hot deformation behavior and microstructural evolution of Inconel 625 superalloy sheet under different conditions were investigated. The plastic flow behavior of the Inconel 625 sheet changes from work hardening to hot softening with the rise of experimental temperature and the decline of strain rate. The optimal hot working window appears at the temperature range of 925 and 950 degrees C and the strain rate between 0.001 and 0.1 s-1 with the power dissipation efficiency of about 46.5%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yeqing Cai, Song Xiang, Yuanbiao Tan
Summary: The dynamic recrystallization behavior of MP159 superalloy was studied through hot compression tests, identifying the optimal hot processing region and investigating the influence of processing parameters on microstructure evolution. Deformation twins formed during hot deformation can accelerate dynamic recrystallization.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Wenxiang Jiang, Junxia Lu, Hao Guan, Mingming Wang, Xiaopeng Cheng, Linlin Liu, Xianqiang Liu, Jin Wang, Yuefei Zhang, Ze Zhang, Weitong Lin, Jing Hu
Summary: The present study aims to clarify the effect of pre-precipitated 8 phases on the microstructure evolution of Inconel 718 superalloy, specifically in terms of their promotion of deformation twins and dynamic recrystallization. The results show that the lower stacking fault energy caused by the precipitation of 8 phases and the local stress concentration caused by their distribution contribute to the promotion of deformation twins. Additionally, the presence of 8 phases leads to a higher fraction of dynamically recrystallized grains.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Marzieh Saremi, Hossein Arabi, Bagher Mohammad Sadeghi, Bahman Mirzakhani, Kian Yousefipour
Summary: Additive manufacturing is a manufacturing method that can fabricate complex components in one step. In this study, the hot deformation behavior of additively manufactured Inconel 718 samples was evaluated using constitutive equations and processing maps. The results showed that the flow stress was significantly influenced by the deformation parameters, and the optimized conditions led to the development of a fine microstructure.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
Ke Tang, Zhibo Zhang, Jin Tian, Yake Wu, Feng Jiang
Summary: The study on hot deformation behaviors of supersaturated Inconel 783 superalloys revealed the optimal temperature and strain rate range to be 1100-1200 degrees C and near or below 0.1 s(-1) but higher than 0.01 s(-1). The microstructural observation showed that the recrystallized degree and grain size were affected by temperature and strain rate differently.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ruoxian Wang, Gaowu Qin, Erlin Zhang
Summary: This study investigated the dynamic recrystallization behavior of a biomedical CoCrW-2Cu alloy through isothermal compression tests. It was found that the variation of deformation condition had limited influence on the phase component, while the strain rate had a significant influence on the extent of recrystallization. The results of this study can contribute to the optimization of hot deformation parameters.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Jieke Zhang, Yu Cao, Yuhao Gong, Jun Xiao, Yulong Zhu, Rui Luo, Qubo He, Qing Liu
Summary: In this study, isothermal hot compression tests were conducted on Inconel X-750 alloy at elevated temperatures. The flow stress was accurately predicted using a back-propagation artificial neural network model. The optimal processing parameters were determined based on a modified hot processing map coupled with the variation of twin boundaries fraction. The possibility of grain boundary engineering via hot deformation was also evaluated. The high-temperature flow behavior and microstructure characterization showed the predominant softening mechanism and the contributions from different recrystallization mechanisms.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zhi Jia, Xuan Sun, Jinjin Ji, Yanjiang Wang, Baolin Wei, Lidan Yu
Summary: The high-temperature compression deformation behavior of Inconel 625 alloy was investigated through hot compression tests, revealing that the optimum condition for plastic deformation is at temperatures higher than 1050 degrees C with a strain rate of 1 to 10 s(-1). The characterization of hot compression microstructure evolution using EBSD and TEM techniques showed different dynamic recrystallization mechanisms under varying compression deformation conditions, with CDRX dominating at lower temperatures and DDRX with a bulging boundary induced by twinning dominating at higher temperatures. These findings provide a theoretical basis for optimizing the thermoplastic processing of nickel-based superalloys.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Chemistry, Physical
J. Xu, S. H. Guo, X. Y. Liu, S. C. Hu, N. B. Zhang, L. Lu, B. Li, S. N. Luo
Summary: The spallation behavior of a solution-treated hot-rolled Inconel 718 superalloy was investigated through plate impact loading and ultrafast free-surface velocity measurements. The microstructures of the initial and postmortem samples were characterized using scanning electron microscopy and electron backscatter diffraction. It was found that incipient spallation occurred near a peak shock stress of 5.3 GPa and a tensile strain rate of 105 s-1. Ductile fracture was the main damage mode, with void nucleation predominantly occurring at grain boundaries and triple junctions. Molecular dynamics simulations were also conducted to explain the observed intergranular and intragranular damage mechanisms in the experiments. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yong Guan, Yongchang Liu, Zongqing Ma, Huijun Li, Hongyao Yu
Summary: The hot deformation behavior and microstructure evolution of as-cast CoNi-based superalloy were investigated through hot compression tests, revealing a peak efficiency of 0.38 on the processing map at 1130 degrees C and a strain rate of 0.01 s(-1). The dominant recrystallization mechanism during hot working was found to be discontinuous dynamic recrystallization (DDRX) related to strain-induced grain boundary migration (SIBM), with additional recrystallization occurring through sub-grains around MC carbides and shear band formations. The presence of fine gamma ' precipitates was also noted to inhibit recrystallization.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Shibo Zhang, Zhanqiang Liu, Bing Wang, Xiaoping Ren, Aqib Mashood Khan, Ming Zhao
Summary: This study investigated the microstructural changes of the white layer formed during turning of nickel-based Inconel 718 alloy, revealing a decrease in gamma' phase and crushing and refining of the 3 phase within the white layer. Additionally, the grains were refined to submicron size, and continuous dynamic recrystallization (CDRX) occurred in the white layer, resulting in significantly reduced defect density.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Jie Ding, S. Xue, Z. Shang, Jin Li, Y. Zhang, R. Su, T. Niu, H. Wang, X. Zhang
Summary: IN718 superalloy's mechanical properties are largely determined by precipitates, with the precipitation of high-density hexagonal eta phase observed in nanograined IN718 alloy after heat treatment. Compressive stress from severe plastic deformation may inhibit the formation of certain phases while accelerating the precipitation of others, affecting the overall mechanical behavior of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Lei Zhang, Shuai Yuan, Jinhui Wang, Lijia Chen, Peipeng Jin
Summary: This study investigated the effect of deformation temperature and strain rate on the hot deformation mechanism of an as-cast Mg-5Al-0.6Sc alloy. The results showed that the flow stress decreased with increasing temperature and decreasing strain rate. A constitutive equation was established to accurately predict the hot deformation behavior of the alloy. The optimal processing area was determined based on processing maps, and the microstructure evolution and dynamic recrystallization mechanism of the alloy were analyzed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chang-Hee Cho, Dal-Oh Kim, Kwangtae Son, Hyun-Soon Park
Summary: Al-Zn-Mg-Cu alloys exhibit the best mechanical properties among aluminum alloys, but suffer from poor formability during metalworking processes. This study investigates the high-temperature deformation behavior and mechanisms of an Al-Zn-Mg-Cu alloy, highlighting flow instabilities at higher strain rates and cooler temperatures, reduced recrystallization, diminished power dissipation efficiencies, and notable alpha-fiber generation.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Le Chen, Bing Zhang, Yan Yang, Tianli Zhao, Yi Xu, Qi Wang, Bin Zan, Jun Cai, Kuaishe Wang, Xi Chen
Summary: Nickel-based superalloy has excellent mechanical properties at high temperature, but the high deformation resistance, narrow deformation temperature range, and complex microstructure evolution of the alloy pose great challenges to its plastic deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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)