Article
Crystallography
Thierry Baudin, Sandrine Bozzi, Francois Brisset, Hiba Azzeddine
Summary: The microstructure, texture gradient and mechanical properties of upper and lower AA5182 aluminum sheets in friction stir spot welding were investigated using EBSD and Vickers microhardness. The upper sheet mainly consisted of the stir zone and thermomechanically affected zone, while the lower sheet had additional heat-affected and base metal zones. Texture changes from shear-type to recrystallization texture were observed along the different zones. Microhardness decreased gradually with increasing distance from the keyhole. The microstructure and microhardness evolution were correlated based on the Hall-Petch relationship.
Article
Materials Science, Multidisciplinary
Zhang Luo, Youping Sun, Wangzhen Li, Jiangmei He, Guojian Luo, Huashen Liu
Summary: The effects of different welding speeds on the microstructures and mechanical properties of Al-0.75Mg-0.75Si-0.8Cu alloys were investigated. The results showed that the welded joint formed different zones and exhibited various textures. The NZ underwent dynamic recrystallisation and had the smallest grain size and best mechanical properties at a welding speed of 125 mm/min.
Article
Materials Science, Multidisciplinary
Yuping Ren, Dongfang Lou, Mingda Zhang, Meiyuan Lv, Hongxiao Li, Gaowu Qin
Summary: This paper investigates the microstructure and mechanical properties of Zn-0.1Mg-1Mn alloy under different extrusion temperatures. The experimental results show that by controlling the extrusion temperature, the grain size and distribution of precipitates in the alloy can be changed, resulting in improved strength and ductility. This is of great significance for the development of biodegradable stents.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
A. Zieba, A. Jarzebska, A. Morawiec
Summary: The widely used electron backscatter diffraction (EBSD) mapping systems do not work well with materials that have non-crystallographic symmetries, which has limited the study of quasicrystals. However, using a commercial system to detect individual EBSD bands and an in-house software to index and determine orientations has proved to be effective. This approach was applied to study decagonal Al-Co-Ni and Al-Co quasicrystals, revealing differences in textures and microstructures.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Shikang Li, Fangyu Shen, Yu Guo, Haijun Liu, Changbai Yu
Summary: The influence of artificial aging time on the microstructures and mechanical properties of 6063 aluminum alloy profiles extruded by porthole die was investigated. The results showed that increasing artificial aging time resulted in an increase in hardness, uneven precipitation phase size and distribution, and decreased plastic deformation ability of the profiles. The welding zone exhibited lower hardness and longer precipitation time compared to the matrix zone.
Article
Engineering, Marine
Zhiyuan Feng, Jiao Li, Jincai Ma, Yongjin Su, Xiaoyuan Zheng, Yu Mao, Zilong Zhao
Summary: This study investigated the corrosion effect of sulfate-reducing bacteria (SRB) on 7075 aluminum alloy in real seawater. The results showed that the addition of SRB accelerated the corrosion rate of the alloy and caused the breakdown of the protective film on the surface.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Kai Zhang, Qingsheng He, Jeremy H. Rao, Yuan Wang, Ruifeng Zhang, Xini Yuan, Weijun Feng, Aijun Huang
Summary: The study found that Cube and Cube(ND) texture components play a significant role in the hemming performance of AA6XXX aluminium alloy sheet, while other texture components may only benefit the hemming performance in certain bending directions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Civil
Amir Kazemi-Navaee, Roohollah Jamaati, Hamed Jamshidi Aval
Summary: This study investigates the effect of single roll drive cross rolling on the properties and microstructure of AA7075 aluminum alloy. The results show that with decreasing thickness, the grain size reduces, texture changes, hardness and strength increase, while ductility decreases.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Rama K. Sabat, Waqas Muhammad, Raja K. Mishra, Kaan Inal
Summary: The microstructure and texture evolution of 6063 aluminum alloys under T4 and T6 conditions during cyclic shear tests were investigated. The results showed that the T6 sample had a higher rate of KAM value increase and slightly greater texture rotation compared to the T4 sample. Latent hardening was mainly attributed to dislocation-dislocation interactions and differences in precipitate volume fractions. The mechanical properties exhibited complex changes, with more significant variations observed in the T6 sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Cheng-quan Zhang, Lin-jiang Chai, Qi-qi LI, Yan-long Ma, Hui Wang, Xu-guang An
Summary: A typical commercial Al alloy 1050 sheet was treated with laser surface remelting (LSR) at different scanning speeds. The remelting layer consists of columnar grains with dense fine SPPs, and the depth of the layer decreases as the scanning speed increases.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Engineering, Mechanical
Lalit Kaushik, Min-Seong Kim, Jaiveer Singh, Joo-Hee Kang, Yoon-Uk Heo, Jin-Yoo Suh, Shi-Hoon Choi
Summary: In this study, equiatomic CoCrFeMnNi high entropy alloy was cold-rolled at different thickness reductions to investigate the evolution of microstructure and deformation texture. The research utilized a combination of experimental techniques and simulations to identify the transition of twin variants and the key factors influencing texture evolution.Results highlighted the transformation of twin variants under dislocation slip and the significant role of deformation modes in texture evolution.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
T. Nakata, C. Xu, S. Kamado
Summary: After cold-rolling an Mg-6Zn-0.3Ca alloy sheet with a strong basal texture, anomalous double twinning occurred with the (0001) pole aligned to the transverse direction. These twins served as nucleation sites for statically recrystallized grains during annealing, resulting in weak texture features in the annealed sheet with transverse-direction split (0001) poles.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Karthik Kumar, Nooruddin Ansari, R. Lakshmi Narayan, Jayant Jain
Summary: The recrystallization, texture, and mechanical properties of Mg-10Ho binary alloy were investigated. After solution treatment and multipass rolling, the annealing process resulted in equiaxed, fully recrystallized microstructure with weaker basal texture. This annealed sample exhibited optimum combination of strength and ductility due to solid solution strengthening, grain refinement, and texture weakening. The solute drag effect played a dominant role in the faster recrystallization kinetics of Mg-10Ho alloy, and the texture variation was explained based on this effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Amir Kazemi-Navaee, Roohollah Jamaati, Hamed Jamshidi Aval
Summary: The study investigated the effects of asymmetric rolling at room temperature on the microstructural evolution, texture, hardness, tensile properties, and fracture surface of AA7075 alloy. It was found that grain size, hardness, and tensile strength were significantly influenced by the degree of asymmetric rolling, with improvements seen in certain properties up to 60% deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Tarek Khelfa, Rabeb Lachhab, Hiba Azzeddine, Zhiguo Chen, Jairo Alberto Munoz, Jose Maria Cabrera-Marrero, Francois Brisset, Anne-Laure Helbert, Thierry Baudin, Mohamed Khitouni
Summary: After ECAP processing, AA6060 aluminum alloy showed a substantial increase in hardness, with stability improving with the number of passes. Grain size and growth kinetics were affected, and annealing temperature had an impact on material properties and structure, leading to reduced hardness and increased grain size at higher temperatures.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Energy & Fuels
Wanggang Zhang, Yiming Liu, Zhiyuan Song, Fuqian Yang
Summary: In this study, a facile method was demonstrated to produce TiO2 nanotube arrays with Au nanocrystals anchoring on the outmost surfaces. The resulting lithium-ion half cells exhibited higher specific capacities and great rate performance. The anchoring of metallic nanocrystals on TiO2 nanotubes shows potential as an anode material for next-generation lithium-ion batteries.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Fuqian Yang
Summary: This paper presents a first-principle analysis of the mechanical deformation of lithium-ion battery electrode materials during lithiation and delithiation, explaining the observed damage and degradation phenomena in lithiated silicon. The study provides insights into the growth and healing of surface cracks controlled by lithiation and delithiation processes.
Article
Engineering, Multidisciplinary
Fuqian Yang, Yong Li, Kai Zhang
Summary: Understanding the evolution of lithium concentration and stresses in electrode materials during electrochemical cycling is crucial for studying the degradation mechanisms of lithiated electrode materials. This study analyzes the diffusion-induced volume expansion by the change rate of the host material's volume and establishes an exponential relationship between volume expansion, concentration of solute atoms, and coefficient of linear expansion. The constitutive relation for diffusion-induced finite deformation of elastic materials is derived using the principle of multiplicative decomposition. The spatial distributions of lithium concentration and stresses in a spherical silicon electrode are found to exhibit similar trends to those calculated from linear elasticity theory and nonlinear characteristics.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2023)
Article
Physics, Applied
Ching-Bin Lin, Chia-Wei Lee, Hao Ouyang, Fuqian Yang, Sanboh Lee
Summary: Understanding the motion of nanoparticles in liquid is important for applications such as drug delivery and fluid flow in nanofluidic systems. This study investigates the Brownian motion of PDVB nanoparticles in water and their aggregation on the water surface. The results show that the diffusivity of PDVB nanoparticles in water is related to the intrinsic viscosity of the corresponding aqueous suspension, following the Stokes-Einstein relation.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Multidisciplinary
Fuqian Yang
Summary: In this work, the effect of mismatch strain for the coherent interface between the core and shell of a Type I core/shell quantum dot (QD) on the ground-state energy of a particle in the core/shell QD is studied using the linear elasticity framework. Closed-form solutions for the energy of the particle at ground state are obtained for both the cubic and wurtzite structures of the core and shell. The numerical results demonstrate that the energy change at ground state is proportional to hydrostatic stress and increases non-linearly with the ratio of the shell thickness to the core radius.
Article
Chemistry, Multidisciplinary
Xiaobing Tang, Shuo Weng, Weiju Hao, Fuqian Yang
Summary: In this work, a green-route approach for the synthesis of lead-free double-perovskite Cs2SnI6 powder and nanocrystals (NCs) is developed. The Cs2SnI6 powder and NCs exhibit different band gaps and photoluminescence properties. The Cs2SnI6 powder shows a photothermal effect and a blueshift of the photoluminescence peak under laser excitation, while the Cs2SnI6 NCs have a stable photoluminescence quantum yield and long-term stability.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Physics, Multidisciplinary
Fuqian Yang
Summary: In this study, the diffusion of water molecules in a bicrystal of halide perovskites was investigated. It was found that grain boundary diffusion plays an important role in the diffusion of water molecules in the bicrystal. Further analysis showed that the structural stability and performance of halide perovskites are affected by the structural degradation induced by water diffusion, which is influenced by diffusion time and grain size.
Article
Chemistry, Analytical
Ming Liu, Xianchao Liu, Fuqian Yang
Summary: This research focuses on the development of flexible piezoresistive sensors using unique surface structures and laser-induced porous graphene. The sensors exhibit excellent sensitivity and cyclic stability, making them suitable for bio-related activity sensing.
Article
Multidisciplinary Sciences
Yong Li, He Huang, Kai Zhang, Mi Hou, Fuqian Yang
Summary: This study investigates the influence of lithium trapping on mechanical stress in batteries and analyzes the changes in chemical stress under different lithium trapping scenarios. The results show that a constant concentration of trapped lithium increases chemical stress, while an inhomogeneous distribution of trapped lithium decreases chemical stress. These findings provide a foundation for mitigating lithium trapping and improving battery performance.
Article
Biochemical Research Methods
Xiaobing Tang, Fuqian Yang
Summary: This article introduces the important role of microfluidics in the fabrication of halide perovskite nanocrystals, including the synthesis of functional structures and materials, the preparation of devices, and the interdisciplinary interactions with fields such as artificial intelligence and machine learning. It also points out the current issues and challenges hindering the development of this technology, and provides future directions and trends for its advancement.
Article
Chemistry, Multidisciplinary
Xiaobing Tang, Xiyu Wen, Fuqian Yang
Summary: This study develops a green-route synthesis method for blue-emitting lead-free halide perovskite Cs2SnCl6 powders, and prepares Cs2SnCl6 nanocrystals through ultrasonication. It is found that changing the volume ratio of the ligands can alter the photoluminescence characteristics of the nanocrystals. The synthesized Cs2SnCl6 nanocrystals exhibit stable photoluminescence quantum yield over a period of 60 days.
Article
Biochemical Research Methods
Xiaobing Tang, Fuqian Yang
Summary: In this study, the growth behavior of CsPbBr3 nanocrystals synthesized in a microfluidic system was analyzed by establishing the relation between bandgap and flow rate. The results showed that the size of the nanocrystals is inversely proportional to the flow rate, and increasing synthesis temperature leads to a wider size distribution.
Article
Chemistry, Multidisciplinary
Nadeesha L. Kothalawala, Sang Won Kim, Namhee Kim, Collan J. Henderson, Minsu Seol, Fuqian Yang, Seung-Yeon Kwak, Kyu Young Hwang, Won-Joon Son, Hyeon-Jin Shin, Hyeonho Choi, Byeong-Su Kim, Doo Young Kim
Summary: Carbon dots are promising carbonaceous nanomaterials for various applications. However, the presence of bright molecular fluorophores produced during their synthesis poses challenges to their development. This study highlights the need for rigorous separation and purification steps for both hydrophilic and low-oxygen-content carbon dots.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Fuqian Yang
Summary: This work discusses the applications of semiconductor nanocrystals in optoelectronics and introduces a method to adjust device performance by controlling the size of nanocrystals. A mathematical model for crystal growth in a liquid solution is established, exploring the size variations of crystals under different growth conditions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Yuan Xue, Yong Li, Kai Zhang, Fuqian Yang
Summary: This paper introduces a method for solving diffusion-induced stress problems using a physics-inspired neural network to solve stress problems caused by diffusion in an elastic sphere. By inputting time-space coordinates and outputting displacement and solute concentration, the spatiotemporal evolution of displacement and solute concentration can be obtained. The numerical results of this method have been validated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)