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Online since: June 2017
Authors: Zhi Min Zhang, Hong Na Qi, Jian Min Yu, Xue Yan Yin, Zhi Yuan Du
However,the authors collected a large number of publications regarding to DRX in Mg alloy[9-11],the critical condition when dynamic recrystallization occurs of Mg-RE alloy and the DRX kinetics are rarely studied.In general, the critical condition of dynamic recrystallization is studied by means of the true stress-strain curve of the material as well as the curve of the work hardening rate to study the key data of dynamic recrystallization.
The essence of the change of flow stress is the proliferation and reduction of dislocations, and the evolution of microstructure induced by dynamic recrystallization.
Fig. 2 Relationships between the peak stress () and strain rate(): (a),(b) When the deformation temperature is constant, and show a linear relationship, as shown in Fig. 3, the slope of the straight line in the Fig. 3 is 1/n, that is , according to the experimental data, n=4.24697.
Fig. 6 Work-hardening rate curve in the condition of 450℃, 0.001s-1 According to Fig. 6, the critical data under this condition, i.e., ,stress of maximum softening rate and the corresponding strain are applied in partial fitting with the parts in curves to form a third order equation using as coefficient, as shown in Fig. 7: Fig. 7 Work-hardening rate curve () (a) and curve (b) in the condition of 450℃, 0.001s-1 Eq. 9 is the third order equation after partial fitting,the solution corresponding to point of inflection of the above equation, that is,the critical stress for dynamic recrystallization under this deformation condition is 66.918Mpa, then the corresponding critical strain is 0.0091.
The essence of the change of flow stress is the proliferation and reduction of dislocations, and the evolution of microstructure induced by dynamic recrystallization.
Fig. 2 Relationships between the peak stress () and strain rate(): (a),(b) When the deformation temperature is constant, and show a linear relationship, as shown in Fig. 3, the slope of the straight line in the Fig. 3 is 1/n, that is , according to the experimental data, n=4.24697.
Fig. 6 Work-hardening rate curve in the condition of 450℃, 0.001s-1 According to Fig. 6, the critical data under this condition, i.e., ,stress of maximum softening rate and the corresponding strain are applied in partial fitting with the parts in curves to form a third order equation using as coefficient, as shown in Fig. 7: Fig. 7 Work-hardening rate curve () (a) and curve (b) in the condition of 450℃, 0.001s-1 Eq. 9 is the third order equation after partial fitting,the solution corresponding to point of inflection of the above equation, that is,the critical stress for dynamic recrystallization under this deformation condition is 66.918Mpa, then the corresponding critical strain is 0.0091.
Online since: September 2011
Authors: Hong Lin, Ya Fu Xu, Jian Xin Sui, Li Min Cao
Statistical Analysis
Drawn data were subjected to the analysis of variance (ANOVA) using the SPSS 13.0 statistical package (SPSS Inc., Chicago, IL, USA).
Data presented as mean ± SD (n=3).
Data presented as mean ± SD (n=3).
For both bacteria, the addition of specific IgY resulted in a significant concentration-dependent reduction of absorbance values compared to controls after 4 h of incubation (P<0.05) (Fig.5).
Data presented as mean ± SD (n=3).
Data presented as mean ± SD (n=3).
For both bacteria, the addition of specific IgY resulted in a significant concentration-dependent reduction of absorbance values compared to controls after 4 h of incubation (P<0.05) (Fig.5).
Online since: April 2021
Authors: Tao Qian Cheng, Zhi Hui Li
The data showed that higher temperatures and longer exposure time generally resulted in further reductions in strength and hardness.
In this study, the statistical data contain precipitates from several images with the same magnification for each sample and only legible precipitates are measured one by one to ensure the accuracy and reliability.
Based on this, the statistical data of precipitates are combined to obtain the approximate ratio of cut and bypass mechanism in Table 3.
In this study, the statistical data contain precipitates from several images with the same magnification for each sample and only legible precipitates are measured one by one to ensure the accuracy and reliability.
Based on this, the statistical data of precipitates are combined to obtain the approximate ratio of cut and bypass mechanism in Table 3.
Online since: June 2022
Authors: Yuriy Sharkeev, Natalya Saprykina, Egor Ibragimov, Alexandr Saprykin, Margarita Khimich, Alexey Saprykin
Analysis of literature data and current work practices with heat-resistant metals allowed us to complete the preliminary estimation of the ranges of the altered melting conditions [16].
In general, having the literature data about all components of the system we can arrange them in the order of their surface energy increase: γ(Cr2O3) < γ(Co) < γ(Mo) < γ(Cr) [26, 27].
Long-term annealing of SLM samples resulted in significant reduction of X-ray lines broadening of the basic ε-phase, disappearance of reflections from γ-phase and appearance of peaks-reflections from the main planes of Cr2O3 phase which had rhombohedral lattice, Fig. 4.
The obtained results of the experimental studies together with the completed analysis of up-to-date literature data demonstrate that it is possible to form structure and phase composition of a heat-resistant cobalt-chromium-molybdenum alloy with controlled physical-mechanical properties to be used for producing three-dimensional complex specialized products applying the selective laser melting method.
In general, having the literature data about all components of the system we can arrange them in the order of their surface energy increase: γ(Cr2O3) < γ(Co) < γ(Mo) < γ(Cr) [26, 27].
Long-term annealing of SLM samples resulted in significant reduction of X-ray lines broadening of the basic ε-phase, disappearance of reflections from γ-phase and appearance of peaks-reflections from the main planes of Cr2O3 phase which had rhombohedral lattice, Fig. 4.
The obtained results of the experimental studies together with the completed analysis of up-to-date literature data demonstrate that it is possible to form structure and phase composition of a heat-resistant cobalt-chromium-molybdenum alloy with controlled physical-mechanical properties to be used for producing three-dimensional complex specialized products applying the selective laser melting method.
Online since: February 2009
Authors: R.H. Weston, J.O. Ajaefobi
Vernadat (1996) highlights the key motivations for enterprise modelling: managing
system complexities, process redesign and reengineering, resource system utilisation and
performance, making data available in the right format to the resource at the right time,
capitalisation of enterprise knowledge and know how, implementation of method based engineering
solutions like BPR, JIT, Lean and Agile manufacturing etc.
For more than two decades, researchers in MSI Research Institute, Loughborough University have collaborated with various industrial partners while developing and deploying coherent and semantically rich ME models from real industrial data.
Consequently during normal operations there is significant WIP and long queues which also result in an untidy working environment and raises questions about health and safety regulation conformance • Woodland production systems are semi-automated deploying competent operators to resource their wood cutting, and furniture making machines and work benches • Though Woodland currently meets its lead time targets, the management wants further lead time reduction to develop its market share and by being more responsive than their competitors
This unified modelling approach was deployed to elicit data and develop various types of model of the Woodland Company.
For more than two decades, researchers in MSI Research Institute, Loughborough University have collaborated with various industrial partners while developing and deploying coherent and semantically rich ME models from real industrial data.
Consequently during normal operations there is significant WIP and long queues which also result in an untidy working environment and raises questions about health and safety regulation conformance • Woodland production systems are semi-automated deploying competent operators to resource their wood cutting, and furniture making machines and work benches • Though Woodland currently meets its lead time targets, the management wants further lead time reduction to develop its market share and by being more responsive than their competitors
This unified modelling approach was deployed to elicit data and develop various types of model of the Woodland Company.
Online since: July 2008
Authors: R. Azhahia Manavalan, A. Mukhopadhyay
A 16% reduction in the spreading of scars could be accomplished by
using dermal support for 3 weeks; and a 38% reduction in spread with the use of dermal support for
6 months.
Creep and Creep recovery data for various types of suture materials [17].
Reduction in strength is more in case of braided and fine sutures.
The tensile strength reduction of commercially available monofilament sutures is shown in Figure 13, which indicates that there is a large difference in the strength reduction among sutures.
PDS II exhibits the lowest reduction rate while Monocryl has the highest, the reduction rate of P(LA/CL) suture being in the middle.
Creep and Creep recovery data for various types of suture materials [17].
Reduction in strength is more in case of braided and fine sutures.
The tensile strength reduction of commercially available monofilament sutures is shown in Figure 13, which indicates that there is a large difference in the strength reduction among sutures.
PDS II exhibits the lowest reduction rate while Monocryl has the highest, the reduction rate of P(LA/CL) suture being in the middle.
Online since: July 2025
Authors: Mahmoud Awny, Randa A. Althobbiti, Mohamed Okil, Mohamed N. Sanad, Mohamed M. Elfaham
Synergistic Effects of Hybridization: The synergistic effect between Cu NPs and CNTs takes advantage of CNTs' electrical conductivity and the metal's catalytic or reactive characteristics to enhance the reduction or oxidation of heavy metal ions during adsorption.
That is why fitting the data to the pseudo-second-order and intra-particle diffusion models is crucial for identifying the adsorption mechanism.
There are limited studies on MOFs with competing ions; more data is needed for real-world wastewater. [69] Arsenic Removal.
Phosphate Moderate to high interference, reducing efficiency High interference due to a similar structure Metal oxides, carbon-based composites 40-60% reduction in efficiency [80, 81] Silicate Mild to moderate impact at higher pH levels Moderate impact, less than phosphate Metal oxides, especially iron-based 20-30% reduction in efficiency [82] Sulfate Low to moderate impact at specific pH ranges Lower impact than phosphate and silicate MNPs, metal-organic frameworks Minor, up to 10-20% reduction [83] Copper nanoparticles, or Cu NPs, are one of the most efficient nanomaterials for removing arsenic.
That is why fitting the data to the pseudo-second-order and intra-particle diffusion models is crucial for identifying the adsorption mechanism.
There are limited studies on MOFs with competing ions; more data is needed for real-world wastewater. [69] Arsenic Removal.
Phosphate Moderate to high interference, reducing efficiency High interference due to a similar structure Metal oxides, carbon-based composites 40-60% reduction in efficiency [80, 81] Silicate Mild to moderate impact at higher pH levels Moderate impact, less than phosphate Metal oxides, especially iron-based 20-30% reduction in efficiency [82] Sulfate Low to moderate impact at specific pH ranges Lower impact than phosphate and silicate MNPs, metal-organic frameworks Minor, up to 10-20% reduction [83] Copper nanoparticles, or Cu NPs, are one of the most efficient nanomaterials for removing arsenic.
Online since: May 2005
Authors: J. Jeswiet
Kegg [18] defined spinnability as the maximum reduction of
thickness, t, that a material, with initial thickness ti can achieve; see Fig. 2.
Advantages: Useable parts can be formed directly from CAD data with a minimum of specialized tooling.
CAD drawings are usually made with a commercial package that allows the user to create a file in a neutral data format.
This method of data transmission is superior to the alternative RS-232 serial cable compatible with the milling machines.
The implicit analysis provided very good results when compared to experimental data, however the time is large for a small benchmark part and short tool path, so that an implicit analysis cannot be used at present for optimisation.
Advantages: Useable parts can be formed directly from CAD data with a minimum of specialized tooling.
CAD drawings are usually made with a commercial package that allows the user to create a file in a neutral data format.
This method of data transmission is superior to the alternative RS-232 serial cable compatible with the milling machines.
The implicit analysis provided very good results when compared to experimental data, however the time is large for a small benchmark part and short tool path, so that an implicit analysis cannot be used at present for optimisation.
Online since: July 2022
Authors: Abdellah El Barkany, Ikram El Abbassi, Meryem Meliani, Morad Mahmoudi
Need Data linearization.
Work only with stationary data.
Requires large volumes of data.
Requires large volumes of data.
Data update Data update Figure 4: Flowchart of the process.
Work only with stationary data.
Requires large volumes of data.
Requires large volumes of data.
Data update Data update Figure 4: Flowchart of the process.
Reynolds Number Effect on the Flow Demeanorin a Vertical Circular Free Turbulent Jet with Cross Flow
Online since: May 2021
Authors: Ahmed Zineddine Dellil, Abdelkader Feddal, Abbes Azzi
Five turbulence models of the RANS (Reynolds Averaged Navier–Stokes) approach were tested and the k -ω SST model was chosen to validate CFD results with the experimental data.
Fig. 4 shows that the graphs of the five models follow the same trend as the experimental curve but it is noted that the graph of the SST model is closer to the experimental data.
With the same boundary conditions, the comparison shows a good agreement with experimental data [6] for the velocities U and V.
Contour of velocity V with differentinter-jet spacing along the vertical plane of symmetryat Re = 4.3 104 Velocity Vectors Through Fig. 16it is observed that the bringing together of the two jets (S = 45mm) leads to a behavior similar to a single jet with a greater speed, which is reflected by the presence of a recirculation zone of vectors before the 1st jet and the absence of interaction in the zone between the two jets, that is to say that this configuration contributes to the consolidation of the upstream jet and to a net reduction in its deflection.
Fig. 4 shows that the graphs of the five models follow the same trend as the experimental curve but it is noted that the graph of the SST model is closer to the experimental data.
With the same boundary conditions, the comparison shows a good agreement with experimental data [6] for the velocities U and V.
Contour of velocity V with differentinter-jet spacing along the vertical plane of symmetryat Re = 4.3 104 Velocity Vectors Through Fig. 16it is observed that the bringing together of the two jets (S = 45mm) leads to a behavior similar to a single jet with a greater speed, which is reflected by the presence of a recirculation zone of vectors before the 1st jet and the absence of interaction in the zone between the two jets, that is to say that this configuration contributes to the consolidation of the upstream jet and to a net reduction in its deflection.