Article
Materials Science, Multidisciplinary
Guzide Meltem Lule Senoz, Taha Alper Yilmaz
Summary: Optimization of ECAP parameters improved the mechanical and microstructural properties of Al-Zn-Mg alloy, with the optimal condition identified. Temperature was found to have a significant effect on grain size.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Song-Jeng Huang, Matoke Peter Mose, Veeramanikandan Rajagopal
Summary: The ECAP method significantly refines the microstructure of AZ61 alloy, enhancing its hydrogen storage capacity and reaction kinetics. The addition of Ni catalyst after ECAP treatment accelerates hydrogen absorption and desorption kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Xiuping Wang, Yan Ma, Bao Meng, Min Wan
Summary: The ultrafine-grained Zn alloy fabricated by ECAP process showed significant grain refinement and texture change, resulting in enhanced yield strength. An optimal combination of yield strength and elongation was achieved after multiple ECAP passes, balancing the mechanical properties of the material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Multidisciplinary
Natalia Martynenko, Natalia Anisimova, Maria Shinkareva, Olga Rybalchenko, Georgy Rybalchenko, Mark Zheleznyi, Elena Lukyanova, Diana Temralieva, Artem Gorbenko, Arseny Raab, Natalia Pashintseva, Gulalek Babayeva, Mikhail Kiselevskiy, Sergey Dobatkin
Summary: The structure and properties of a Zn-1%Mg-0.1%Dy alloy after ECAP were investigated. The refinement of the structure led to the formation of elongated grains and the presence of Mg- and Dy-containing phases. The alloy exhibited increased tensile strength and ductility after ECAP. The degradation of the alloy was slowed down and its biocompatibility was not impaired.
Article
Chemistry, Physical
Mario Scholze, Martin F. -X. Wagner, Dagmar Dietrich, Cagatay Elibol, Sebastian Fritsch, Christian Illgen, Benjamin Bohne, Marcus Boehme, Damien Colas, Philipp Frint
Summary: The ability to modify microstructural features and properties make red gold an attractive choice for applications in electronics, dental devices, and jewelry. This study investigates the effect of severe plastic deformation by equal-channel angular pressing (ECAP) on microstructural evolution in an 18-carat AuCuAg alloy and the ordering kinetics during subsequent aging. The results demonstrate the potential of ECAP combined with heat treatments for microstructural optimization of AuCuAg alloys and their applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Bahram Azad, Ali Reza Eivani, Mohammad Taghi Salehi
Summary: In this study, the effects of homogenization heat treatment and equal channel angular pressing process (ECAP) on the microstructure and mechanical properties of Zn-22Al alloy were investigated. Homogenization resulted in a transformation from a lamellar structure to equiaxed grains. Homogenization also led to the formation of a homogeneous structure and a decrease in microhardness. On the other hand, the ECAP process was effective in achieving an ultra-fine grained (UFG) and equiaxed microstructure, improving superplastic behavior and increasing failure elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
G. S. Dyakonov, T. Yakovleva, A. G. Stotskiy, S. Mironov
Summary: The microstructural characterization of the Ti-5.7Al-3.8Mo-1.2Zr-1.3Sn alloy after equal channel angular pressing (ECAP) showed that the spheroidization process was governed by the conventional boundary splitting mechanism, with a nearly-Burgers orientation relationship between the spheroidized a-and b phases. This suggests a high cooperation in slip activity between the phases.
Article
Materials Science, Multidisciplinary
Sarath Babu Duraisamy, Hisashi Sato, Yoshimi Watanabe
Summary: Changes in the spatial distributions of platelet Al3Ti particles in an Al-Al3Ti alloy during equal-channel angular pressing (ECAP) were investigated. The results showed that the processing routes A and B had different effects on the fragmentation and agglomeration of Al3Ti particles, as well as the gradual decrease in particle size with increasing ECAP passes. Route B resulted in a more homogeneous distribution of Al3Ti particles after 8 passes compared to route A.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Salaheddine Sadi, Abdelkader Hanna, Hiba Azzeddine, Casimir Casas, Thierry Baudin, Anne-Laure Helbert, Francois Brisset, Jose Maria Cabrera
Summary: The microstructure and texture of binary Mg-0.3Ce alloy were investigated after ECAP processing at 300 and 350 degrees C. Effective grain refinement was achieved through dynamic recrystallization, with different mechanisms observed at different temperatures. Texture development varied based on strain level and DRX mechanisms, forming a typical basal texture at 300 degrees C and a different texture at 350 degrees C due to grain size.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Min Zha, Chun-Xue Wang, Zhong-Zheng Jin, Hai-Long Jia, Hong Xu, Ping-Yu Zhang, Yu Huang, Ping-Kui Ma, Hui-Yuan Wang
Summary: This study investigates the microstructure and texture evolution of a Mg-3.7Al-0.7Zn-0.8Sn-0.4Mn alloy under different ECAP routes, showing that increasing the number of ECAP passes can improve strength and ductility. The optimized mechanical properties can be achieved through proper ECAP processing, indicating the great potential of Mg-Al-Zn-Sn alloys for low-cost high-strength-ductility wrought Mg alloys.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xiaoru Zhuo, Cong Shao, Peng Zhang, Zhichao Hu, Huan Liu
Summary: An Mg-5Sn alloy was processed by ECAP, and the microstructure evolution and mechanical properties were studied. The grain size, amount of Mg2Sn precipitates, and texture varied with the number of passes. ECAP alloys showed improved strengths due to various strengthening mechanisms. The UTS increased while the EL decreased with increasing ECAP pass.
Article
Materials Science, Multidisciplinary
I Vysotskii, S. Malopheyev, S. Mironov, R. Kaibyshev
Summary: Low-temperature friction-stir welding is successfully used for joining ultrafine-grained Al-Mg-Mn alloy, preserving the microstructure and second-phase particles, and achieving nearly-100% joint efficiency. The deformation behavior and strengthening mechanisms of the welded joints are studied.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Zhenquan Yang, Aibin Ma, Bingqian Xu, Jinghua Jiang, Jiapeng Sun
Summary: The microstructure of a commercial AZ91 Mg alloy was modified through ECAP and aging, resulting in improved corrosion resistance. Aging treatment at 150 degrees Celsius for 60-90 hours produced fine beta phase precipitates that enhanced the micro-galvanic effect, leading to increased corrosion rates still lower than that of the as-cast alloy.
Article
Materials Science, Multidisciplinary
Esmaeel Naderi, Hamid Reza Jafarian, Ali Davoodi
Summary: The mechanical properties and corrosion resistance of WE43 magnesium alloy are improved by processing samples using ECAP up to four passes. Yield strength and uniaxial tensile strength continue to improve up to three passes, but deteriorate in the fourth pass. The improvement in properties is attributed to the pinning effect of the precipitated intermetallic secondary phase of beta particles, while the decline in properties is associated with morphology changes.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Metallurgy & Metallurgical Engineering
A. Rezaei, R. Mahmudi, R. E. Loge
Summary: The microstructure of the extruded Mg-6Gd-3Y-1.5Ag alloy was refined through ECAP processing, resulting in improved superplastic behavior.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Gastroenterology & Hepatology
Cheng Kong, Lei Liang, Guang Liu, Lutao Du, Yongzhi Yang, Jianqiang Liu, Debing Shi, Xinxiang Li, Yanlei Ma
Summary: This study investigated the interactions between gut microbiome, metabolites, and microbial enzymes in early-onset colorectal cancer (EO-CRC) patients. The results showed distinct associations between microbiome and metabolome in EO-CRC compared to late-onset CRC (LO-CRC). The study identified potential biomarkers for EO-CRC and achieved a powerful classification performance for distinguishing EO-CRC from controls. This research provides valuable insights into the pathogenesis of EO-CRC and highlights the potential of microbiome-derived biomarkers for non-invasive detection.
Article
Engineering, Civil
Haoran Chen, Xuedong Yan, Xiaobing Liu, Tao Ma
Summary: With the rapid development of internet technologies and shared mobility services, online ridesharing services have become popular worldwide. This study compares the operational performance of two major online ridesharing modes, ridesplitting and carpooling, using actual operating data provided by DiDi Chuxing. The findings indicate that ridesplitting has lower fuel-saving and distance-saving ratios compared to carpooling, and online ridesharing is not considered fuel-saving in terms of transportation system's fuel economy.
Article
Information Science & Library Science
Pengzhen Yin, Chuang Wang, Liang Liang
Summary: This study examines the antecedents (i.e. characteristics of MICT) and outcomes (i.e. employee affective and cognitive well-being) of routine MICT use in the remote work context. The findings show that routine MICT use increases employee affective well-being, such as job satisfaction, and mitigates cognitive well-being issues, such as technology overload. The study also highlights the mediation effects of routine MICT use on the relationship between its characteristics and employee well-being.
INFORMATION TECHNOLOGY & PEOPLE
(2023)
Article
Chemistry, Physical
Zengqi Lu, Xiaolong Fu, Jiamao Li, Jingwei Hou, Guangming Ran, Chengjian Xiao, Xiaolin Wang
Summary: A hydrophobic microscopic reaction environment was constructed through the modification of mesoporous silica, which helped improve the catalytic activity of the LPCE reaction. The Pt@SBA-15-tetramethyldisilazane catalyst, prepared by modifying the SBA-15 carrier and loading metal Pt, exhibited a superhydrophobic structure with a water contact angle of 158 degrees. This structure enhanced the catalytic performance and prevented catalyst deactivation. Experimental results showed that the catalyst had good catalytic activity in tritium water and maintained high activity after 30 days.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Agriculture, Multidisciplinary
Yuxiang Gu, Haoran Chen, Xing Li, Dan Li, Yue Sun, Lin Yang, Ying Ma, Eric Chun Yong Chan
Summary: This study found that Lactobacillus paracasei IMC 502 can prevent and alleviate type 2 diabetes by mediating the gut microbiota-SCFA-hormone/inflammation pathway.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Liyun Zheng, Chun Yang, Liang Liang, Shengxiang Rao, Yongming Dai, Mengsu Zeng
Summary: This study aimed to explore the feasibility of pancreatic imaging at 5 T and evaluate the practical improvement of T2-weighted MRI and diffusion-weighted imaging (DWI) at 5 T as compared with 3 T. The results showed that imaging at 5 T provided higher image quality ratings and SNR compared to 3 T for both T2-weighted and DWI images. However, there were no significant differences in the mean ADC values and CV of ADC between 3 T and 5 T measurements.
Article
Chemistry, Organic
Mao-Lin Yang, Hao-Ran Chen, Long Zhao, Ming-Wu Ding
Summary: A new efficient synthesis method for the preparation of 6,12-dihydro-5H-quinazolino[3,2-a]quinazolin-5-ones has been developed. This method involves sequential Ugi/Staudinger/aza-Wittig/addition/nucleophilic acyl substitution reactions and provides a domino and effective strategy for the preparation of various substituted quinazolino[3,2-a]quinazolin-5-ones under mild reaction conditions.
SYNTHESIS-STUTTGART
(2023)
Article
Automation & Control Systems
Huiming Li, Hao Chen, Xiangke Wang
Summary: This paper investigates the problem of collision-free leader-follower formation generation and tracking of multiple fixed-wing unmanned aerial vehicles (UAVs). A novel control law based on physicomimetics approach is proposed to integrate formation generation, formation tracking, and collision avoidance. The artificial forces driven by control laws imitating physical forces are used to achieve desired collaborative behaviors and obstacle avoidance naturally. Speed constraints are also considered and modified using a saturation function. Numerical simulations and experiments are provided to verify the effectiveness of the proposed control scheme.
ASIAN JOURNAL OF CONTROL
(2023)
Article
Engineering, Environmental
Long Liang, Chunmin Zhang, Shaolei Zhao, Baozhong Liu, Limin Wang, Fei Liang
Summary: Designing efficient catalysts is a crucial challenge for practical applications of high-capacity hydride in fuel-cell-based hydrogen economy. In this study, platinum-functionalized Ti3C2 material with an accordion-like structure, interlayer, and surface-dispersed nanoparticles was synthesized. The catalyst, Ti3C2@Pt, reduced the initial dehydrogenation temperature of high-density hydride AlH3 by 50% to 62 °C, comparable to commercial AlH3. Moreover, it exhibited high hydrogen supplying performance and retention ratio, achieving 9.3 wt% and 98% respectively, surpassing previously reported catalysts. The exceptional dehydrogenation performance of the material makes it a practical candidate for mobile device applications with the aid of high-efficiency catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Automation & Control Systems
Yuanmao Ye, Yongbin Zhang, Xiaolin Wang, Ka-Wai Eric Cheng
Summary: This article presents a new type of step-up multilevel inverter (MLI) using a front-side quasi-Z-source unit, which effectively limits the charging current variation and enhances the total voltage gain.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yuanmao Ye, Minhao Chen, Xiaolin Wang, Lingling Cao
Summary: This article introduces a new boost-type common-ground photovoltaic (PV) inverter, which solves the problems of inrush charging current, input current quality, and boost capability by inserting a quasi-Z-source (qZS) unit into an SC-based common-ground inverter, and is experimentally verified.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Jianqiang Luo, Fei Teng, Siqi Bu, Zhongda Chu, Ning Tong, Anbo Meng, Ling Yang, Xiaolin Wang
Summary: This paper proposes a solution to address the traditional operational constraint issue in power systems considering converter-driven stability and elaborates on a power sensitivity-based power dispatch method to enhance stability margin and update operational constraint solutions.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Review
Chemistry, Multidisciplinary
Hui-Ying Tan, Jiali Wang, Sheng-Chih Lin, Tsung-Rong Kuo, Hao Ming Chen
Summary: Single-atom catalysts (SACs) are promising electrocatalysts for energy conversion and storage due to their efficient atom utilization and unique electronic properties. The local coordination structures of single metal centers play a significant role in catalytic performances, and understanding the dynamic changes of SACs during reactions is crucial for improving catalytic activity.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Gastroenterology & Hepatology
Xiaoduan Zhuang, Shaoheng Zhang, Guiquan Chen, Zongqi Luo, Huiqin Hu, Wenfeng Huang, Yu Guo, Yongwen Ouyang, Liang Peng, Qing Qing, Huiting Chen, Bingsheng Li, Jie Chen, Xinying Wang
Summary: This study aimed to explore the unsatisfactory histologically complete resection (CR) rate of small rectal neuroendocrine tumors (RNETs) and its associated risk factors and clinical outcomes. The study found that polypectomy, a central depression, and treatment in the early period were risk factors for incomplete resection (IR). Further analysis revealed that an atypical hyperemic appearance and treatment in the early period were significant predisposing factors for inappropriate choice of polypectomy.
GASTROENTEROLOGY REPORT
(2023)
Article
Automation & Control Systems
Zhongjing Yu, Gangyi Zhang, Jingyu Chen, Haoran Chen, Duo Zhang, Qinli Yang, Junming Shao
Summary: This paper proposes a noise-resistant graph embedding method, called NGE, which leverages subspace clustering information to capture community structure and reinforce the relationship between topology and attributes. Experimental results demonstrate the superiority of this method in tasks such as community detection, link prediction, and node classification.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
