Article
Mechanics
Sabeur Msolli, Zhi-Qian Zhang, Debbie Hwee Leng Seng, Zheng Zhang, Junyan Guo, C. D. Reddy, N. Sridhar, Jisheng Pan, Boon Hee Tan, Qizhong Loi
Summary: The study introduces a computationally validated model for microstructural evolution in cold spray additive manufacturing of Al6061 alloy coating. The model accurately predicts the evolution of microstructure, providing insights into influencing factors and optimizing process conditions.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Automation & Control Systems
Magdi F. Morks, Saden H. Zahiri, Jeff Lang, Xiao-Bo Chen, Stefan Gulizia, Ivan S. Cole
Summary: This study investigates the effects of powder morphology and post-processing heat treatment on the properties of cold-sprayed CP Ti deposits. The results show that cold-sprayed deposits from spherical powders exhibit better mechanical properties, and post-heat treatment significantly enhances their performance.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Li Wan, Shumeng Lu, Shanju Zheng, Mengnie Li, Yonghua Duan, Zhongdong Xu
Summary: In this study, elemental partitioning was introduced before welding simulation to achieve elemental redistribution and find a feasible method to decrease the hardness of heat-affected zone (HAZ). The results showed that the introduction of elemental partitioning can achieve a reduction of about 10% in HAZ hardness. During elemental partitioning, the content of retained austenite increases with increasing partitioned time. Further research revealed a decrease in the value of geometrically necessary dislocation density with elemental partitioning. It was also found that the alloying elemental contents in the matrix after elemental partitioning were lower than that without elemental partitioning. Additionally, the differences in grain size distribution and elemental distribution resulting from elemental partitioning were studied and compared to explain the reason for the reduction in hardness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Zhiqiang Hou, Haikuo Wang, Yao Tang, Chao Wang, Chao Xu, Jiakun Wu, Zhicai Zhang, Shun Wan, Hongbing Yang, Yue Qin, Xiuyu Wang, Xiaoping Ouyang
Summary: Fine-grained and pure polycrystalline boron carbide bulks were successfully fabricated using submicron-sized boron carbide powder as starting materials under high pressure (5.5 GPa) and low temperature range (1000-1400 degrees C). The well-sintered boron carbide bulk recovered at 1000 degrees C exhibited a mean grain size of 205.2 +/- 191.2 nm and a relative density of up to approximately 97%. The measured Vickers hardness and fracture toughness achieved 35.0 +/- 2.8 GPa and 4.6 +/- 0.5 MPa m(0.5), respectively. The synergistic effect between fine grain size and dislocation, as well as the interplay between amorphous grain-boundary phases and pores via grain-boundary sliding, played critical roles in improving hardness and toughness.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Ziyu Wang, Lingling Xie, Qun Zhang, Raneen Abd Ali, Wenliang Chen, Lijuan Zhou
Summary: This study proposed a coupled constitutive model to predict the depth of fine-grain of the 2060-T8 aluminum-lithium (Al-Li) alloy after shot peening. The influences of shot size on yield stress, dislocation density, and crystal orientation of Al-Li alloy were systematically studied to reveal the strengthening mechanism. The results showed that larger shot sizes can significantly improve the depth of the dislocation density layer and the fine-grain layer of 2060 Al-Li alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Ziyu Wang, Kaoshi Zhang, Yanqiao Song, Raneen Abd Ali, Wenliang Chen, Xingxing Wang
Summary: This study investigated the mechanical behavior and microstructure evolution of 2060 Al-Li alloy under high strain rates. The results showed that high strain rates led to increased dislocation density and grain refinement in the alloy, as well as affected the structure of grain boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Coatings & Films
Alessia Bruera, Pietro Puddu, Stephan Theimer, Maria Villa-Vidaller, Alexander List, Giovanni Bolelli, Frank Gaertner, Thomas Klassen, Luca Lusvarghi
Summary: This study investigates the adhesion of cold-sprayed copper particles onto differently adjusted hardness and roughness values of AISI 304 stainless steel surfaces. With SEM analysis and nano-indentation tests, it was found that grit-blasting causes severe plastic deformation of the surface, while vacuum annealing can restore the original hardness. The adhesion of cold-sprayed copper particles was found to be higher on roughened and softened substrates than on polished surfaces.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Songjiang Lu, Qianhua Kan, Michael Zaiser, Zhenhuan Li, Guozheng Kang, Xu Zhang
Summary: This study examines the effects of grain size and dislocation source properties on the yield stress of ultrafine-grained polycrystals using three-dimensional multiscale discrete dislocation dynamics. The simulation demonstrates a nonmonotonic dependency of flow stress on dislocation source length and deviations from the classical Hall-Petch relationship in the grain size dependence of yield stress. The study provides insights into the controlling factors of yield stress in the ultrafine-grained regime and proposes a theoretical model to explain the combined effects of source length, grain size, and initial dislocation density.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Engineering, Manufacturing
Zi-Shan Ding, Yun-Hui Zhao, Miao-Xian Guo, Wei-Cheng Guo, Chong-Jun Wu, Steven Y. Liang
Summary: This study proposes an iterative blending grinding force model that comprehensively considers the impact of grain size and dislocation density evolution on the grinding force. The effects of the evolution of grain size and dislocation density on the grinding forces are studied by means of iterative cycles. The results indicate that the implementation of an iterative blending scheme enables a more accurate prediction of the grinding force and a deeper understanding of the influence of materials microstructure on the grinding process.
ADVANCES IN MANUFACTURING
(2023)
Article
Chemistry, Multidisciplinary
N. Mathimurugan, V. Vaishnav, R. Praveen Kumar, P. Boobalan, S. Nandha, Venkatesh Chenrayan, Kiran Shahapurkar, Vineet Tirth, Ibrahim M. Alarifi, Moutaz Mustafa A. Eldirderi, Khaled Mohamed Khedher, Hadee Mohammed Najm
Summary: The development of aluminium composites with advanced materials, such as TiB2 and graphene, has been studied in this research. The aim of the study is to meet the increasing industrial demand for advanced hybrid materials. The research focuses on the development of Al 7075 alloy reinforced with TiB2 and graphene and evaluates its strengthening mechanism. The results show significant improvement in tensile and hardness compared to the base alloy. The fracture-morphology results indicate a change in fracture mode from brittle to ductile when the testing environment changes from room temperature to high temperature. The dispersion strengthening mechanism is validated with an empirical approach.
Article
Materials Science, Multidisciplinary
Kai Hu, Jun Yi, Bo Huang, Xilei Bian, Gang Wang
Summary: This study overcomes the trade-off between strength and ductility in pure nickel materials by using grain boundary relaxation and optimizing grain size. The results show that grain boundary relaxation can improve both tensile strength and uniform elongation of nickel, and enhance the plastic deformation through controlling dislocation activities.
APPLIED MATERIALS TODAY
(2022)
Article
Materials Science, Multidisciplinary
Ebitha Eqbal, E. Anila
Summary: Nanostructured transparent conducting SnO2 thin films were successfully grown on glass substrates via spray pyrolysis, showing an average transmission of 60% and a maximum conductivity of 24.86 S/cm for samples prepared at 0.2M concentration of precursor solution. The films exhibited Photoluminescence (PL) emission colors of green, greenish white, and bluish white depending on the intensities of excitonic and oxygen vacancy defect level emissions.
Article
Materials Science, Multidisciplinary
Nicole K. Aragon, Jamie D. Gravell, Ill Ryu
Summary: Research demonstrates that grain boundaries play a crucial role in nanostructured metals, influencing plastic deformation by controlling dislocation propagation. Different samples with high angle grain boundaries and coherent twin boundaries show distinct mechanical responses in plastic deformation.
Article
Materials Science, Coatings & Films
Fu Jun Wei, Bang Yen chou, Kuan Zhong Fung, Shu Yi Tsai
Summary: This study investigates the plastic strain distribution of cold spray Cu powders and coatings using electron backscatter diffraction (EBSD) analysis. It is found that more dynamic recrystallization and plastic strain release occur in the as-sprayed EP and GA coatings compared to the WA coating. The influence of recrystallization of twin grains in the GA coating on the ductility of the coating is discussed. The static recrystallization in the postannealing treatment is more prominent in the EP and GA coatings, supporting differences in dynamic recrystallization among the cold-sprayed coatings determined through EBSD analysis. The thermal conductivity of cold-sprayed Cu coatings is affected by recrystallization and strain release.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Luorong Dengzhu, Leiming Fang, Bin Gan, Zhengwei Xiong, Qian Liu, Yi Liu, Jia Yang, Jun Li, Zhipeng Gao
Summary: This study elucidates the microstructural changes induced by cold deformation on MP159 alloy through multi-scale structural characterizations. The results show that cold deformation refines the grains, breaks the grain boundaries and transforms them into low-angle grain boundaries, leading to significant enhancement of strength and hardness in the alloy.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Coatings & Films
Jiu-Tao Gao, Jia-Hong Li, Yue-Peng Wang, Chang-Jiu Li, Cheng-Xin Li
Summary: This study adopts a novel structure design of large-area planar metal-supported solid oxide fuel cell (MS-SOFC), which exhibits the characteristics of self-sealing and high thermal cycling resistance. Various techniques were used for preparation and characterization, showing good stability and performance of the cells.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Yu-Juan Li, Xiao-Tao Luo, Chang-Jiu Li
Summary: Utilizing acid pickling to remove the surficial oxide scale of powder particles, the study focused on improving the deposition efficiency and properties of cold-sprayed Cu deposits. Results showed that acid pickling significantly enhanced the deposition efficiency from 74% to 84% and improved the tensile properties and conductivities of Cu deposits. Acid-pickled powder yielded a tensile strength of 245 MPa, Young modulus of 85 GPa, electrical conductivity of 90%IACS, and thermal conductivity of 298 W.m(-1).K-1.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Jia-Jia Tian, Kai Wang, Kang-Wei Xu, Xiao-Tao Luo, Guo-Sheng Shao, Chang-Jiu Li
Summary: The Cu-Ti coating with varying copper content showed influence on its micro-galvanic dissolution behavior and antifouling performance, with higher copper content leading to increased copper ions release rate and antifouling duration against bacterial survival. Electrochemical tests revealed that the amount of micro-galvanic cells, rather than the dissolution rate of each single micro-cell, played a more prominent role in deciding the total copper dissolution rate and antifouling capabilities.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Xiao-Tao Luo, Shao-Peng Li, Geng-Cheng Li, Ying-Chun Xie, Hu Zhang, Ren-Zhong Huang, Chang-Jiu Li
Summary: By using cold spray process to deposit silver coating on the inner wall of the CVD reactor, the radiative losses were successfully reduced and the thermal shock resistance was improved, while the bond strength of the silver coating was significantly increased. This scientific methodology can be a cost-effective approach to reduce the radiation energy losses in the polysilicon-CVD industry.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ying-Kang Wei, Xiao-Tao Luo, Xin Chu, Yi Ge, Guo-Sheng Huang, Ying-Chun Xie, Ren-Zhong Huang, Chang-Jiu Li
Summary: Three types of nickel powders were sprayed onto magnesium alloys using an in-situ micro-forging assisted cold spray method. The GA-Ni coating showed better inter-particle bonding compared to the C-Ni and E-Ni coatings, resulting in better corrosion resistance for the former. The presence of inter-particle gaps in the latter coatings allowed for faster penetration of corrosive media, leading to their failure in corrosion tests within a short period of time.
Article
Materials Science, Coatings & Films
Hongxia Zhou, Chengxin Li, Chris Bennett, Hussain Tanvir, Changjiu Li
Summary: In this study, numerical analysis was conducted on the behavior of particles during cold-spraying processes, revealing that subsequent particle impacts can significantly increase deformation of previously deposited particles, potentially leading to localized interfacial melting. Experimental results suggest that the bond between particles and substrate can be enhanced.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2021)
Article
Engineering, Environmental
Muhammad Bilal Hanif, Martin Motola, Sana Qayyum, Sajid Rauf, Azqa Khalid, Chang-Jiu Li, Cheng-Xin Li
Summary: Solid oxide fuel cells (SOFCs) hold promise for energy conversion technology, but face challenges such as component degradation and sulfur poisoning. This article discusses various electrode materials and improvements to enhance electrochemical performance, highlighting critical challenges for advancement.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Yue-Peng Wang, Cheng-Xin Li, Jiu-Tao Gao, Chang-Jiu Li
Summary: In this study, the oxidation kinetics of 430L porous support in PMS-SOFCs was investigated, showing a 1% mass gain after 500 hours of exposure at 650 degrees C due to the formation of a continuous Cr2O3 scale. Diffusion of elements across the interface of the anode and support was hindered by thin and continuous scales, with less than 1 µm thickness after 500 hours of oxidation. The decrease in maximum power density after 500 hours of oxidation was attributed to the formation of a continuous Cr2O3 scale and an increase in ohmic and polarization resistance.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2022)
Article
Materials Science, Coatings & Films
Di Wang, Li Zhang, Shan-Lin Zhang, Xiao-Tao Luo, Chang-Jiu Li
Summary: The study investigated the influence of chamber pressure on the microstructure and ablation behavior of ZrB2 coatings deposited by low-pressure plasma spraying. Results showed that porosity decreased with reduced chamber pressure, affecting the ablation performance of the coating. The dense ZrB2 coating deposited at 100 Pa exhibited the lowest ablation rate.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
Muhammad Bilal Hanif, Sajid Rauf, Martin Motola, Zaheer Ud Din Babar, Chang-Jiu Li, Cheng-Xin Li
Summary: This review summarizes recent developments and prospects of perovskite electrolyte materials in solid oxide fuel cells, emphasizing various design strategies and challenges.
MATERIALS RESEARCH BULLETIN
(2022)
Review
Materials Science, Coatings & Films
Chang-Jiu Li, Xiao-Tao Luo, Shu-Wei Yao, Guang-Rong Li, Cheng-Xin Li, Guan-Jun Yang
Summary: Thermal spraying is a crucial coating technology for depositing advanced ceramic coatings in various industrial fields. The adhesion and cohesion of ceramic coatings are of primary importance. This paper examines the main factors influencing bonding formation during thermal spraying of ceramic coatings and proposes solutions. It is possible to achieve chemical bonding in ceramic coatings by controlling spray particle and substrate parameters. The effects of spray particle parameters on bonding formation and the control of metal substrate oxide scale are also discussed.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Review
Materials Science, Ceramics
Zhi-Yuan Wei, Guo-Hui Meng, Lin Chen, Guang-Rong Li, Mei-Jun Liu, Wei-Xu Zhang, Li-Na Zhao, Qiang Zhang, Xiao-Dong Zhang, Chun-Lei Wan, Zhi-Xue Qu, Lin Chen, Jing Feng, Ling Liu, Hui Dong, Ze-Bin Bao, Xiao-Feng Zhao, Xiao-Feng Zhang, Lei Guo, Liang Wang, Bo Cheng, Wei-Wei Zhang, Peng-Yun Xu, Guan-Jun Yang, Hong-Neng Cai, Hong Cui, You Wang, Fu-Xing Ye, Zhuang Ma, Wei Pan, Min Liu, Ke-Song Zhou, Chang-Jiu Li
Summary: This paper reviews the latest progress of new ceramic materials, summarizes the spalling mechanism of the ceramic top coat, and discusses new structural design methods for high-performance TBCs. It provides comprehensive guidance for the development of next-generation advanced TBCs.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Materials Science, Multidisciplinary
Di Wang, Li Zhang, Xiao-Tao Luo, Chang-Jiu Li
Summary: Dense ZrB2-MoSi2 coatings were deposited on SiC-coated C/C composites for significantly improved ablation resistance, with the added MoSi2 producing a solid oxygen-blocking MoB layer and liquid self-sealing SiO2.
Article
Materials Science, Coatings & Films
Li-Yan Lou, Kang-Cheng Liu, Yun-Jie Jia, Gang Ji, Wei Wang, Chang-Jiu Li, Cheng-Xin Li
Summary: In this study, lightweight refractory high-entropy alloy coatings with different dilutions were deposited on TC4 substrate using high-speed laser cladding technology. By controlling specific processing parameters, coatings with a dilution lower than 3% were successfully obtained, and nearly defect-free coatings were manufactured within a dilution range of 2.4%-33.6%.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Huiyu Zhang, Georg Mauer, Senhui Liu, Meng Liu, Yunjie Jia, Changjiu Li, Chengxin Li, Robert Vassen
Summary: In this study, the characteristics of plasma generated by the cascaded SinplexPro (TM) plasma spray gun were analyzed using numerical simulation. It was found that under certain conditions, the internal flow can be considered as quasi-laminar with low turbulence, while the turbulent plasma jet generated by the cascaded SinplexPro (TM) plasma spray gun is less affected and remains stable.
