Article
Chemistry, Physical
Fubing Gui, Yong Huang, Menghan Wu, Xilai Lu, Yongming Hu, Wanping Chen
Summary: High long-term stability is crucial for room-temperature gas-sensitive metal oxide semiconductors (MOSs) to find practical applications. The CO-sensing characteristics of Pd-SnO2 composite nanoceramics degrade after aging, but can be effectively reactivated through mild heat treatments.
Article
Physics, Fluids & Plasmas
Ben Zhu, Xue-qiao Xu, Xian-Zhu Tang
Summary: The edge plasma turbulence and transport dynamics, as well as the divertor power loads during the thermal-quench phase of tokamak disruptions, are numerically investigated. Interesting features, such as surging of divertor heat load and broadening of heat-flux width on the outer-divertor target plate, are observed in the simulation, in qualitative agreement with experimental observations.
Article
Nuclear Science & Technology
Heriberto Sanchez-Mora, Rodolfo Vazquez-Rodriguez, Erick G. Espinosa-Martinez, Ricardo I. Cazares-Ramirez, Sergio Quezada-Garcia
Summary: The QUENCH program aims to create an experimental database for the development and validation of mathematical models focused on determining the source term of hydrogen during core degradation and re-flooding conditions. In this study, the QUENCH-05 Experiment data is used to validate a mathematical model, which evaluates different correlations to determine the oxidation rate and accurately model temperature, hydrogen generation, and ZrO2 thickness. The results show good agreement between the mathematical model and the experimental data.
NUCLEAR ENGINEERING AND DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Ali Shafiei, Saeed Khani Moghanaki, Mostafa Amirjan
Summary: The microstructure and mechanical properties of Al14Co41Cr15Fe10Ni20 high entropy alloy were investigated in this study. The alloy exhibited a dual phase microstructure composed of dendritic solid solution FCC phase and an interdendritic B2 (BCC) phase, both in as-cast and homogenized states. Aging treatments at temperatures in the range of 750°C-1000°C resulted in the uniform distribution of precipitates throughout the alloy. The mechanical tests showed that the room temperature properties of the alloy were comparable to commercial Co-based alloys, but the high temperature ductility was poor. These findings contribute to the development of high entropy alloys with dual phase FCC/B2 microstructures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Xiang Peng, Wencai Liu, Guohua Wu, Hao Ji, Wenjiang Ding
Summary: Mg-Li alloys, as the lightest structural metallic materials, have a bright future in aerospace, weapon equipment, electronic technology, and transportation. The research focuses on the factors affecting plastic deformation, the impact of plastic deformation on microstructural evolution and mechanical properties, and the heat treatment behavior of Mg-Li alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Thermodynamics
Xiao-Qiao Zhao, Wen-Qian Wu, Hua-bo Li, Wang-Hua Chen, Zi-Chao Guo, Li-Ping Chen
Summary: Adiabatic calorimetry is a key experimental method for studying thermal hazards in chemical processes, but faces challenges in identifying reaction models and maintaining system equilibrium under rapid temperature rise rates. This study introduces the heat-quench-heat method to address these issues and accurately evaluate kinetic parameters.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Construction & Building Technology
Yanheng He, Zhilong Cao, Zhaoyang Liu, Jiangting Li, Jianying Yu, Yangyang Ge
Summary: This study investigated the aging behavior of high dosage styrene-butadienestyrene (SBS) modified bitumen (HSMB) for waterproof materials and low dosage SBS modified bitumen (LSMB) for pavement. It was found that HSMB exhibited better aging resistance than LSMB. Additionally, the effects of UV-heat synergism aging on the properties and chemical structure of HSMB and LSMB were more significant compared to heat aging alone. The aging kinetic models also showed that HSMB had a lower aging reaction rate and larger activation energy than LSMB, indicating better aging resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Thermodynamics
Doyoung Shin, Sung Joong Kim
Summary: A study was conducted to investigate the reflood heat transfer of a Cr-layered vertical tube. The results showed that the Cr coating enhanced capillary wicking potential and had superhydrophilic characteristics, while oxidation had different impacts on the quench performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Multidisciplinary
Derya cakan, Onur Ertugrul, Mustafa Safa Yilmaz
Summary: In this study, the microstructure and mechanical properties of maraging steels produced by DMLS method were investigated. The results showed that the molten pool boundaries became blurred with increasing temperature. Coaxial cellular structures and bands were observed in all samples. XRD results indicated the presence of martensite and gamma phases in all atmospheres. The nitrogen atmosphere showed better corrosion resistance than the air atmosphere.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Safa H. Mohammed, Ali A. Aljubouri, Mohammed Jawad Kadhim
Summary: This study investigates the effect of low-temperature aging treatment on the phase transformation and microstructure of Ti-rich NiTi shape memory alloys. The results show that aging treatment alters the transformation temperatures and microstructure, leading to an increase in the Ti2Ni phase content in the alloy.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Zhanyong Zhao, Pei Wang, Rongxia Zhao, Wenbo Du, Zhiquan Huang, Peikang Bai
Summary: Graphene was successfully coated with nano-Mg using an organic magnesium reduction method. The coated graphene was then processed into AZ91 magnesium matrix composites through hot-pressing sintering. The effects of different solution and aging heat treatment on the microstructure evolution and interface bonding of the composites were investigated.
MATERIALS CHARACTERIZATION
(2023)
Article
Thermodynamics
Qingqing Liu, Hanxing Sun, Yang Liu, Joseph Kelly, Xiaodong Sun
Summary: Post-CHF experiments were conducted in a vertical tubular test section with water as the working fluid to study heat transfer characteristics during the formation, growth, and propagation of dry patches. Temperature gradients along the axial direction of the test section wall were calculated up to 15 degrees C/mm, resulting in axial heat conduction and thermal stresses. Convective heat transfer coefficients for dry patches were compared with existing correlations, showing larger values than those predicted especially for low wall superheats.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Materials Science, Multidisciplinary
Augustine Samuel, K. Narayan Prabhu
Summary: Mineral oil, derived from petroleum crude oil, is widely used as a quench media in heat treatment industries. However, it is toxic and non-biodegradable. To minimize the use of mineral oil, fatty acid methyl esters (FAME) derived from used cooking oil can be blended with mineral oil. However, the high unsaturation of FAME decreases the thermal-oxidative stability of the blend. In this study, the stability of the blend was improved by decreasing the unsaturation through epoxidation of FAME.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Environmental
Dae Woo Kim, Young Wook Noh, Jongmin Han, Hye Seung Kim, Chung Hyeon Jang, Ji A. Hong, Sangmi Park, Min Hyeong Lee, Ye In Kim, Myoung Hoon Song
Summary: This study reports a hybrid deposition method for perovskite films, which improves the quality of the film by applying daily electrical stress and aging. The best perovskite solar cell achieved a high power conversion efficiency of 21.1% and a large open-circuit voltage of 1.21 V. The reaction of unreacted PbI2 with MAI was accelerated using the solvent pre-heat treatment method, leading to a shorter aging time of 7 days and a PCE value of 20.7%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Yanqing Xue, Qitang Hao, Xinlei Li, Han Zhang, Peiqing Wang, Chengze Yin, Bo Li, Xinliang Wang
Summary: This study focuses on the intractable issues of local particle agglomeration and poor interfacial characteristics in particle-reinforced aluminum matrix composites. The authors propose a microalloying strategy using Mg-Ag to improve the properties of TiB2/Al-4.5Cu composites. The results show that this strategy effectively reduces particle agglomeration and promotes the formation of desirable phases, resulting in composites with high tensile strength and ductility. The study highlights the reciprocal effect between TiB2 particles and precipitated phases, as well as the importance of interface binding characteristics.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)