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Article
Engineering, Mechanical
Zhigang Dong et al.
Summary: This study conducted a molecular dynamics simulation of nano-cutting tungsten and proposed a method to determine the minimum uncut chip thickness. The effects of chip formation on the removal mechanism of tungsten were also studied. It was found that the critical cutting depth without chip affected the surface quality and subsurface damage. The plastic deformation mechanism depended on the presence of chip during the cutting process.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Ceramics
Jianlong Chai et al.
Summary: Al2O3/SiC ceramic composites with different SiC contents were prepared using powder metallurgy method. The effect of second phase particles on the microstructure and mechanical properties of the composites was studied. The results showed that increasing SiC particle content led to a decrease in grain size of the alumina matrix, as well as a significant enhancement in strength and toughness.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Industrial
Zhelun Ma et al.
Summary: In this study, a predictive model for grinding force during laser-assisted grinding (LAG) process is established, taking into account the mechanical properties of the material, micro interaction between grit and material, and random shapes and distributions of abrasive grits. The model explains the mechanism of reduction in grinding force during LAG. Experimental validation and investigation of grinding parameters show that optimal parameters can significantly reduce grinding force and improve surface integrity.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Xiu-shan Deng et al.
Summary: This study investigates the effects of grinding parameters on the properties of 3Y-TZP, including grinding forces, surface phase transformation, residual stress, surface roughness, and flexural strength. The results show that increasing the depth of cut and feed speed increases the grinding forces, compressive residual stress, and surface roughness, while increasing the wheel speed has the opposite effect. Grinding also promotes the surface phase transformation of 3Y-TZP, with the phase content increasing with depth of cut and decreasing with wheel speed. Moreover, the flexural strength of ground 3Y-TZP decreases with increasing cut depth. Dry grinding leads to higher surface roughness and the presence of fractures and smears.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Cangbao Liu et al.
Summary: The effect of surface brittle-to-ductile transition (BDT) on the high-temperature thermal shock resistance (TSR) of Al2O3 ceramics was investigated. The BDT temperature was found to be around 1000°C and was associated with the softening of the grain boundary glass phase. The appearance of surface BDT during the high-temperature thermal shock process improved the residual strength of specimens.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Serge Shamray et al.
Summary: Ductile grinding of brittle materials is crucial for high precision applications and maintaining the strength and lifespan of parts. This study focuses on the ductile microgrinding of Si3N4 as a brittle material, calculating and validating the critical and maximum uncut chip thicknesses to guide achieving ductile grinding mode. The experiments show that the material removal mechanism affects the surface integrity, with ductile removal mode being more advantageous for surface quality.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Hao Wang et al.
Summary: Although the effects of tool geometry on the removal behavior of many metals have been studied, the same is not true for tungsten due to its higher brittleness. Here, a molecular dynamics simulation model was established to investigate the removal behavior during nano-cutting of tungsten with different tool geometries. The results showed that certain tool geometries, such as larger positive rake angle or clearance angle and smaller edge radius, were beneficial for reducing surface roughness, elastic recovery, subsurface damage layer thickness, cutting force, cutting temperature, friction coefficient, and maximum stress. The research findings provide a theoretical basis for the micro removal behavior of tungsten and can serve as a reference for tool design in nano-cutting.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Manufacturing
Hao Wang et al.
Summary: This study used molecular dynamics simulation to investigate the evolution mechanism of subsurface damage in nano-cutting of single-crystal tungsten, as well as the effects of cutting force on subsurface damage. The results revealed the presence of various forms of damage, including atomic cluster, vacancy defect, V-shaped dislocation, stair-rod dislocation, and dislocation ring. The cutting force and its fluctuation significantly influenced the subsurface damage, such as the number of surface defect atoms, dislocation density, and thickness of the subsurface damage layer. It is important to select a smaller cutting depth and appropriate cutting speed to minimize subsurface damage during nano-cutting of tungsten components.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Thermodynamics
Ying Liu et al.
Summary: This study developed a numerical thermal model for belt grinding based on a moving parabolic heat source method, considering elastic contact, grinding zone shape, and nonuniformity of heat source. It was found that the maximum grinding temperature of a 40 HA contact wheel decreased by 33.1% compared to that of a 90 HA contact wheel, and the grinding temperature of curved surfaces was unevenly distributed in the elliptic-shape grinding zone. Furthermore, as the curvature radius of the workpiece increased, the grinding temperature decreased, and the maximum temperature of transverse grinding decreased by 39% compared to that of longitudinal grinding.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Manufacturing
Zhelun Ma et al.
Summary: Zirconia ceramics are widely used in various fields due to their outstanding biocompatibility, wear resistance, chemical resistance, and improved toughness. Laser-assisted grinding (LAG) is a potential machining process for hard and brittle materials. This study establishes a grinding wheel model considering stochastic process and proposes a predictive model for surface topography in LAG process. Experiments show that increasing laser power improves surface integrity and reduces sub-surface damage. The average power density is defined as an indicator for evaluating machining parameters.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Ceramics
Hang Yin et al.
Summary: The material-removal mechanism of yttrium aluminium garnet (YAG) polycrystalline ceramics was studied, revealing a three-stage process of material removal with increasing scratch depths. The critical removal depth was obtained, providing a theoretical basis for determining process parameters in ultra-precision grinding.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Fei Chen et al.
Summary: In this study, a modeling approach based on Voronoi tessellation was developed for whisker-reinforced ceramics (WRC), and the mechanical properties of 0-6 wt% ss-Si3N4w-reinforced Si3N4 ceramics (SWRSC) were predicted. The results showed that the flexural strength of SWRSC increased significantly with the increasing content of ss-Si3N4w. The enhancement mechanisms, including crack deflection, intergranular fracture, and load-bearing effect of ss-Si3N4w, were successfully simulated. The predicted values were consistent with experimental conclusions, confirming the effectiveness of the modeling method.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Debora Cristina Niero Fabris et al.
Summary: This study produced lithia-alumina-silica glass-ceramics with different crystallized layer thicknesses by inducing surface crystallization of a low coefficient of thermal expansion phase, and analyzed their effects on mechanical properties. It unveiled the causes of improved mechanical properties and validated the concept that surface crystallization is a valuable technique for developing high strength glass-ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Cezhi Du et al.
Summary: The surface quality and residual stress of Al2O3 and ZrO2 ceramics were improved using pre-compressive stress grinding, with ZrO2 exhibiting lower surface roughness. The residual compressive stress was found to be higher at a grinding depth of 30 µm for both ceramics under the same grinding parameters.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jianbo Dai et al.
Summary: By conducting a single-diamond grinding test on SSiC, researchers were able to identify stages of purely ductile, primarily ductile, primarily brittle, and purely brittle behavior during the grinding process. The high density of dislocations and amorphization of SiC grains were found to be responsible for the plastic deformation of SSiC, with stress concentration at grain boundaries being the main mechanism for crack initiation.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Amit Choudhary et al.
Summary: The study demonstrates that controlling the scallop height (S-g) can effectively reduce defects induced by grinding in ceramic components. Increasing grinding speed significantly decreases S-g, which has different effects on brittle ceramics and tougher ceramics.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Haipeng Yan et al.
Summary: An orthogonal experiment was conducted in this study to investigate the effect of grinding parameters on the surface quality of Silicon Nitride ceramics in internal grinding of bearing rings, and two prediction models were established, providing significant reference for improving the surface quality in internal grinding of ceramic materials.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Engineering, Mechanical
Yun Huang et al.
Summary: This study experimentally investigated the influence of abrasive belt wear on the surface residual stress distribution of titanium plate belt grinding. The results showed that the more severe the belt wear, the greater the accumulation of grinding heat and the generation of residual tensile stress.
Article
Materials Science, Ceramics
Zhelun Ma et al.
CERAMICS INTERNATIONAL
(2020)
Article
Engineering, Mechanical
Haipeng Yan et al.
NONLINEAR DYNAMICS
(2020)
Article
Engineering, Mechanical
Ping Li et al.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2020)
Article
Materials Science, Ceramics
Simanchal Kar et al.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Article
Automation & Control Systems
Berend Denkena et al.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Acoustics
Yuhou Wu et al.
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Materials Science, Ceramics
Mariusz Deja et al.
CERAMICS INTERNATIONAL
(2019)
Article
Materials Science, Ceramics
Mohammad Baraheni et al.
CERAMICS INTERNATIONAL
(2019)
Article
Engineering, Manufacturing
Linlin Wan et al.
JOURNAL OF MANUFACTURING PROCESSES
(2019)
Article
Optics
Xiaohong Zhang et al.
OPTICS AND LASER TECHNOLOGY
(2019)
Article
Materials Science, Ceramics
Linlin Wan et al.
CERAMICS INTERNATIONAL
(2018)
Article
Automation & Control Systems
Bahman Azarhoushang et al.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2017)
Article
Green & Sustainable Science & Technology
Bahman Azarhoushang et al.
JOURNAL OF CLEANER PRODUCTION
(2017)
Article
Materials Science, Ceramics
Wei Liu et al.
CERAMICS INTERNATIONAL
(2017)
Article
Materials Science, Ceramics
R. Stadelmann et al.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2016)
Article
Engineering, Manufacturing
Su-Jin Lee et al.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING
(2014)
Article
Engineering, Mechanical
Irina Hussainova et al.
