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Online since: April 2023
Authors: Kahtan A. Mohammed, Shivprakash Barve, Pralhad Pesode, Shailendra Dayane, Yogesh Mane, Snehal Kolekar
Figure 3 shows the summary of the variables that affect the properties and ability of MAO coatings.
Fig.3 Variables affecting properties and capabilities of MAO coatings [45] Li et al. [50] observed that, the number of micropores reduces as the voltage rises, while the thickness, pore size, and cracks all rise.
Two factors that affect the formation of calcium phosphate crystals are calcium phosphate nucleation and Ca-P distribution from the inner coating to the surface of coating [61].
Researchers [66,67] found that, electrical parameters including current, voltage, power density, duty cycle, and frequency, the composition of the Mg alloy, and the properties of the electrolyte are just a few of the factors affecting the qualities of films made by the MAO process.
"Effects on microstructure and mechanical properties of AZ31 reinforced with CNT by powder metallurgy: An overview."
Fig.3 Variables affecting properties and capabilities of MAO coatings [45] Li et al. [50] observed that, the number of micropores reduces as the voltage rises, while the thickness, pore size, and cracks all rise.
Two factors that affect the formation of calcium phosphate crystals are calcium phosphate nucleation and Ca-P distribution from the inner coating to the surface of coating [61].
Researchers [66,67] found that, electrical parameters including current, voltage, power density, duty cycle, and frequency, the composition of the Mg alloy, and the properties of the electrolyte are just a few of the factors affecting the qualities of films made by the MAO process.
"Effects on microstructure and mechanical properties of AZ31 reinforced with CNT by powder metallurgy: An overview."
Online since: November 2005
Authors: Kenichi Shimizu, YouLi Ma, Tashiyuki Torii
These measured
crack discontinuous displacements make it possible to evaluate the effective stress intensity factors
(KI)est and (KII)est in order to compare them with the theoretical factors KI and KII and the crack contact
behavior under mixed-mode conditions was discussed.
The chemical composition and mechanical properties are shown in Table 1 and Table 2, respectively.
Table 1 Chemical composition (mass %) C Si Mn P S 0.47 0.22 0.70 0.015 0.019 Table 2 Mechanical properties Young's modulus (GPa) Poisson's ratio Yield point (MPa) Tensile strength (MPa) Elongation (%) Reduction of area (%) 206 0.3 319 622 25.4 35.8 Experimental Results Residual Stress Distribution.
Mode II Stress Intensity Factors.
Fig. 5 Evaluation of mode I stress intensity factors 10 8 6 4 2 0 Estimated stress intensity factor (KII)est MPa 1086420 Stress intensity factor KII MPa (KII)est=KII R =0 (a =4.0 mm) R =- 1 (a =4.1 mm) β =45 deg.
The chemical composition and mechanical properties are shown in Table 1 and Table 2, respectively.
Table 1 Chemical composition (mass %) C Si Mn P S 0.47 0.22 0.70 0.015 0.019 Table 2 Mechanical properties Young's modulus (GPa) Poisson's ratio Yield point (MPa) Tensile strength (MPa) Elongation (%) Reduction of area (%) 206 0.3 319 622 25.4 35.8 Experimental Results Residual Stress Distribution.
Mode II Stress Intensity Factors.
Fig. 5 Evaluation of mode I stress intensity factors 10 8 6 4 2 0 Estimated stress intensity factor (KII)est MPa 1086420 Stress intensity factor KII MPa (KII)est=KII R =0 (a =4.0 mm) R =- 1 (a =4.1 mm) β =45 deg.
Online since: April 2004
Authors: Osamu Kamiya, M. Takano, F. Ashihara, L. Chouanine
Influence of the Surface Topography on the Micromechanical
Properties and Performance of a CMP Finished AlN
Component for Silicon Plasma Etching
L.
The degrees of surface smoothness and flatness are important factors because they influence the thermal uniformity and chucking capability of AlN ESC.
Micromechanical Properties of Y and AlN/Y Interface A post SEM close up image showed that the indents No. 9, 12 and 13 are located within the surface of yttrium, on the AlN/Y interface, and within an AlN particle, respectively.
In the second and main part of this experimental study, tribological properties of AlN ESC, we have shown by independent observations of selected localized nanoindentations on the AlN ESC that the CMP induced SD gravely affected the micromechanical properties of the substrate, particularly the AlN/Y boundary strength.
Richerdson, Modern Ceramic Engineering: Properties, Processing, and Use in Design, 2nd ed.; Marcel Dekker, New York (1992) p. 374. 3.
The degrees of surface smoothness and flatness are important factors because they influence the thermal uniformity and chucking capability of AlN ESC.
Micromechanical Properties of Y and AlN/Y Interface A post SEM close up image showed that the indents No. 9, 12 and 13 are located within the surface of yttrium, on the AlN/Y interface, and within an AlN particle, respectively.
In the second and main part of this experimental study, tribological properties of AlN ESC, we have shown by independent observations of selected localized nanoindentations on the AlN ESC that the CMP induced SD gravely affected the micromechanical properties of the substrate, particularly the AlN/Y boundary strength.
Richerdson, Modern Ceramic Engineering: Properties, Processing, and Use in Design, 2nd ed.; Marcel Dekker, New York (1992) p. 374. 3.
Online since: January 2006
Authors: Hong Ho Cheng, C.C. Chen
It possesses excellent
physical and chemical properties including the highest hardness and thermal conductivity, and good
resistance to chemical erosion.
Because of these excellent properties, they render it appropriate for numerous mechanical, optical, thermal, and electrical applications [1].
In the second part, the factors were set the down force 1 and 4 kg, temperature 70 and 90 �, and rotational speed 100 and 200 rpm.
In this figure, one finds that the main polishing factors are down load, rotational speed, and temperature in order.
Although the main factors affecting surface quality also follow the order of load, temperature and speed, high rotational speed does not warrant for good surface roughness.
Because of these excellent properties, they render it appropriate for numerous mechanical, optical, thermal, and electrical applications [1].
In the second part, the factors were set the down force 1 and 4 kg, temperature 70 and 90 �, and rotational speed 100 and 200 rpm.
In this figure, one finds that the main polishing factors are down load, rotational speed, and temperature in order.
Although the main factors affecting surface quality also follow the order of load, temperature and speed, high rotational speed does not warrant for good surface roughness.
Online since: October 2020
Authors: Ismel V. Musov, Azamat L. Slonov, Elena V. Rzhevskaya, Azamat A. Zhansitov, Svetlana Khashirova
The article presents the results of a study of the effect of milled and chopped carbon fibers, with an average particle length of 0.2 and 3 mm, respectively, on the mechanical properties of polyphenylene sulfide and its heat resistance.
These polymers have a complex of high mechanical properties, maintain performance at high temperatures, and have high chemical, radiation, heat and fire resistance.
Based on this, it was of interest to study the effect of milled and chopped carbon fibers (CF) on the main properties of PPS and to establish the effect of fiber length and its content in the composite on its mechanical and thermal properties, for further use of the results obtained in the development of carbon-filled composite material based on PPS for 3D printing by the FDM method.
The data obtained correspond to mechanical properties, in particular, to the elastic modulus of these composites, which shows the resistance to deformation of the material.
Chukov, et al., Structure, Mechanical and Thermal Properties of Polyphenylene Sulfide and Polysulfone Impregnated Carbon Fiber Composites, Polymers. 11 (2019) 684
These polymers have a complex of high mechanical properties, maintain performance at high temperatures, and have high chemical, radiation, heat and fire resistance.
Based on this, it was of interest to study the effect of milled and chopped carbon fibers (CF) on the main properties of PPS and to establish the effect of fiber length and its content in the composite on its mechanical and thermal properties, for further use of the results obtained in the development of carbon-filled composite material based on PPS for 3D printing by the FDM method.
The data obtained correspond to mechanical properties, in particular, to the elastic modulus of these composites, which shows the resistance to deformation of the material.
Chukov, et al., Structure, Mechanical and Thermal Properties of Polyphenylene Sulfide and Polysulfone Impregnated Carbon Fiber Composites, Polymers. 11 (2019) 684
Online since: July 2012
Authors: Qi Xia Liu, Liang Fan
The Midwest cities large engineering construction have mushroomed, these engineering investment big, affecting wide, in its construction or after completion of the construction process, form many large scale ,project more,factors complex,geological environment variable, saftey and use requirement different loess slope engineering.
Geotechnical engineering experts and geological experts, with a specific project construction, and the choice of the loess section representative of the physical and mechanical properties of from macroscopical to microcosmic launched into the system the research [1] [2] [3].
B Exterior factors 1) Climatic factor Rainfall and melted snow is the major source for groundwater in the loess area.
B Mechanical analysis of The loess slope instability Under the action of loess slope gravity stress, with the pressure action of the overlying soil the microstructure change of loess will cause the major change of loess’ physical and mechanical properties, so changes the soil structure.
The safety factors caculated by various of limit equilibrium method show in table 1,the maximum is 0.843 for the safety factors.
Geotechnical engineering experts and geological experts, with a specific project construction, and the choice of the loess section representative of the physical and mechanical properties of from macroscopical to microcosmic launched into the system the research [1] [2] [3].
B Exterior factors 1) Climatic factor Rainfall and melted snow is the major source for groundwater in the loess area.
B Mechanical analysis of The loess slope instability Under the action of loess slope gravity stress, with the pressure action of the overlying soil the microstructure change of loess will cause the major change of loess’ physical and mechanical properties, so changes the soil structure.
The safety factors caculated by various of limit equilibrium method show in table 1,the maximum is 0.843 for the safety factors.
Online since: February 2022
Authors: Fan Zhu, Lei Zhang, Yu Feng Wang, Zi Min Fan
Zhu, et al., Research progress in structure and properties of high thermal conductivity polymer composites, Chemical Research. 29 (2018) 429-440.
].
Metal materials are poor in chemical corrosion resistance and insulation performance, inorganic materials have higher processing costs, and carbon materials have poor mechanical properties.
The increase of the overall thermoelastic coefficient of the thermal conductive filler and the polymer matrix will lead to the increase of the thermal conductivity of the composite, and the thermal conductivity of the composite generally will not change dramatically, but will only gradually increase. 2 Factors Affecting Thermal Conductivity 2.1 Type and Amount of Filler There are three types of thermal conductive fillers: metal fillers, inorganic fillers and carbon-based fillers.
This is because the filler with larger particle size will have more space in the matrix with the increase of filling amount, affecting heat transfer.
The maximum in-plane thermal conductivity of the composite paper is 21.7 W/(m·K), and it has excellent mechanical and insulation properties. 2.3.2 Surface treatment There is a great difference between the surface tension of the thermal conductive filler and the matrix, and it is easy to form segregation.
Metal materials are poor in chemical corrosion resistance and insulation performance, inorganic materials have higher processing costs, and carbon materials have poor mechanical properties.
The increase of the overall thermoelastic coefficient of the thermal conductive filler and the polymer matrix will lead to the increase of the thermal conductivity of the composite, and the thermal conductivity of the composite generally will not change dramatically, but will only gradually increase. 2 Factors Affecting Thermal Conductivity 2.1 Type and Amount of Filler There are three types of thermal conductive fillers: metal fillers, inorganic fillers and carbon-based fillers.
This is because the filler with larger particle size will have more space in the matrix with the increase of filling amount, affecting heat transfer.
The maximum in-plane thermal conductivity of the composite paper is 21.7 W/(m·K), and it has excellent mechanical and insulation properties. 2.3.2 Surface treatment There is a great difference between the surface tension of the thermal conductive filler and the matrix, and it is easy to form segregation.
Online since: December 2007
Authors: X. Kong, B. Li, Qing Xiang Yang, G. Rothwell, R. English, X.J. Ren
The
constitutive material properties of the base, nugget and the heat-affected-zone (HAZ) were
determined by an inverse FE modelling approach using indentation test data.
In general, FE modelling would require that the correct constitutive material properties were included in the finite-element analysis.
This is not always straightforward for spot welding since the material properties can vary widely between the base metal, the heat-affected-zone (HAZ) and the weld nugget itself.
In the model, different material properties were FE Simulation of Spot Welding process Mechanical FE Models Geometric Attributes Strength Detailed Material Properties for each Welding Zone Fig. 2 The modelling approach used to study the effect of welding parameters on the strength of spot-welded joints used for the nugget, heat-affected zones and the base.
The property of the base metal was determined by testing a notched specimen, while the properties for the HAZ and nugget were determined by combining indentation tests and inverse FE modelling technique [5].
In general, FE modelling would require that the correct constitutive material properties were included in the finite-element analysis.
This is not always straightforward for spot welding since the material properties can vary widely between the base metal, the heat-affected-zone (HAZ) and the weld nugget itself.
In the model, different material properties were FE Simulation of Spot Welding process Mechanical FE Models Geometric Attributes Strength Detailed Material Properties for each Welding Zone Fig. 2 The modelling approach used to study the effect of welding parameters on the strength of spot-welded joints used for the nugget, heat-affected zones and the base.
The property of the base metal was determined by testing a notched specimen, while the properties for the HAZ and nugget were determined by combining indentation tests and inverse FE modelling technique [5].
Online since: January 2012
Authors: M.O.H. Amuda, S. Mridha
Furthermore, high GRI does not necessarily translate to better mechanical properties relative to the conventional weld.
This suggests that the grain size effect might not be the only factor influencing the property of weld metal.
These mechanisms enable the formation of equiaxed grains leading to improved mechanical properties.
Kotecki [6] and Folkhard [7] suggest that other than the grain morphology/size, metallurgical factors such as the amount and distribution of martensite, carbide precipitate or delta ferrite might equally affect the mechanical properties of weld.
This implies that the grain size effect might not be the only factor influencing the property of the weld track; such other factors such as the presence and percent distribution of delta ferrite and the existence of cracks in the resolidified melt pool might equally be contributory.
This suggests that the grain size effect might not be the only factor influencing the property of weld metal.
These mechanisms enable the formation of equiaxed grains leading to improved mechanical properties.
Kotecki [6] and Folkhard [7] suggest that other than the grain morphology/size, metallurgical factors such as the amount and distribution of martensite, carbide precipitate or delta ferrite might equally affect the mechanical properties of weld.
This implies that the grain size effect might not be the only factor influencing the property of the weld track; such other factors such as the presence and percent distribution of delta ferrite and the existence of cracks in the resolidified melt pool might equally be contributory.
Online since: July 2016
Authors: A.M. Mustafa Al Bakri, Mohd Noor Ervina Efzan, N. Siti Syazwani
Method of fabrication is one of the essential factors in producing AMCs since it will determine end product properties of AMCs.
Mechanical properties of particulate AMCs have been well documented.
These defects lead to poor machinability and inferior mechanical properties.
These reactions lead to the formation of brittle compound, which will adversely affect the mechanical properties of the composite [7].
Method of fabrication is one of the essential factors in producing AMCs since it will determine end product properties of AMCs.
Mechanical properties of particulate AMCs have been well documented.
These defects lead to poor machinability and inferior mechanical properties.
These reactions lead to the formation of brittle compound, which will adversely affect the mechanical properties of the composite [7].
Method of fabrication is one of the essential factors in producing AMCs since it will determine end product properties of AMCs.