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Online since: November 2010
Authors: Y. Iino
Results and Discussion
Fig. 3 shows the relation between number of fatigue cycle N and the fatigue crack length a and b.
It is seen from Fig. 4 (c) and (d) that the recrystallized grain size just at the crack in H2 is larger than that in pure air.
This means that APZ size with high accumulated plastic strain Fig. 3 Relation between number of cycle N and fatigue crack length on the notch root surface a and fatigue crack length on the side surface b.
It is seen from Fig. 4 (c) and (d) that the recrystallized grain size just at the crack in H2 is larger than that in pure air.
This means that APZ size with high accumulated plastic strain Fig. 3 Relation between number of cycle N and fatigue crack length on the notch root surface a and fatigue crack length on the side surface b.
Online since: March 2006
Authors: Kyung Ha Kim, Chong Mu Lee, Jong Min Lim
Dependences of the deposition rate on the
substrate temperature have been reported for a number of sputtered materials.
On the other hand the number of particles striking the cathode is proportional to the current density consequently current is much more importantly in determining the deposition rate than voltage.
The sputter-deposited Cr film shows a columnar growth of Cr films perpendicular to the steel substrate by sputtering, whereas the electroplated Cr film shows equiaxial grains.
On the other hand the number of particles striking the cathode is proportional to the current density consequently current is much more importantly in determining the deposition rate than voltage.
The sputter-deposited Cr film shows a columnar growth of Cr films perpendicular to the steel substrate by sputtering, whereas the electroplated Cr film shows equiaxial grains.
Online since: February 2011
Authors: Wang Nian Zhang, Xue Fei Du, Guo Dong Sun, Ning Deng, Chang Hua Liu
In order to examine the parallelism of the method, use six samples material of A, B, C, D, E, F each time respectively, each sample takes 10g, take two types of different serial numbers each time, experiment six times each kind of samples respectively.
From fig.1 and table 3 .As a result of the grain size difference, causes the final rate of liveweight growth difference.
Experimental maximum deviation experiment’s degree 1 2 3 4 5 6 A maximum deviation 0.10 0.15 0.08 0.08 0.07 0.07 B maximum deviation 0.09 0.11 0.14 0.15 0.05 0.07 C maximum deviation 0.13 0.17 0.13 0.13 0.07 0.11 D maximum deviation 0.14 0.14 0.08 0.12 0.06 0.18 E maximum deviation 0.02 0.12 0.12 0.07 0.11 0.10 F maximum deviation 0.08 0.06 0.07 0.10 0.06 0.07 Table 3 Sample A, B, C, D, E, F final average weight gain Materal number 1 2 3 4 5 6 A 1.03 0.81 0.93 0.96 0.98 1.02 B 1.26 1.16 1.19 1.22 1.12 1.22 C 0.89 0.91 0.81 0.83 0.88 0.98 D 0.75 0.92 0.76 0.84 0.85 0.97 E 0.52 0.65 0.51 0.49 0.58 0.56 F 0.43 0.58 0.46 0.44 0.48 0.49 Table 4.
From fig.1 and table 3 .As a result of the grain size difference, causes the final rate of liveweight growth difference.
Experimental maximum deviation experiment’s degree 1 2 3 4 5 6 A maximum deviation 0.10 0.15 0.08 0.08 0.07 0.07 B maximum deviation 0.09 0.11 0.14 0.15 0.05 0.07 C maximum deviation 0.13 0.17 0.13 0.13 0.07 0.11 D maximum deviation 0.14 0.14 0.08 0.12 0.06 0.18 E maximum deviation 0.02 0.12 0.12 0.07 0.11 0.10 F maximum deviation 0.08 0.06 0.07 0.10 0.06 0.07 Table 3 Sample A, B, C, D, E, F final average weight gain Materal number 1 2 3 4 5 6 A 1.03 0.81 0.93 0.96 0.98 1.02 B 1.26 1.16 1.19 1.22 1.12 1.22 C 0.89 0.91 0.81 0.83 0.88 0.98 D 0.75 0.92 0.76 0.84 0.85 0.97 E 0.52 0.65 0.51 0.49 0.58 0.56 F 0.43 0.58 0.46 0.44 0.48 0.49 Table 4.
Online since: September 2011
Authors: Ya Liu, Lei Zhen
Yakwool fabric possesses the performance of good elasticity feel, grain lines, soft and light.
The number of knitting needles was 160-pin and all the fabrics were weft knitted fabrics.
(1) (2) Where Yi is the hand value of number i.C0, Ci1, Ci2,are constants,Mi1 and Mi2 are the average of Yi and Yi2, σi1and σi2 are the standard deviation of Yi and Yi2.
The number of knitting needles was 160-pin and all the fabrics were weft knitted fabrics.
(1) (2) Where Yi is the hand value of number i.C0, Ci1, Ci2,are constants,Mi1 and Mi2 are the average of Yi and Yi2, σi1and σi2 are the standard deviation of Yi and Yi2.
Online since: August 2016
Authors: Eduardo T. Galvani, V.A.R. Henriques, Carlos Alberto Alves Cairo, M.L.A. Graça, A.C.S.M. Dutra
Powder metallurgy (P/M) of Ti-based alloys may lead to the obtainment of components having weak-to-absent textures, uniform grain structure and higher homogeneity compared with conventional wrought products.
For fine-grained binary TiAl alloys, the room temperature elongation to fracture varies with Al-content, exhibiting a maximum at the two-phase composition Ti–48Al [3-4].
Microstructural varieties numbered 1 to 5 represent regions where EDS analyses were performed (Table II).
This structure is characterized by the presence of γ grains and lamellar colonies of alternating layers of γ and α2 phases.
(d) A duplex microstructure was obtained by hot pressing route characterized by the presence of γ grains and lamellar colonies of alternating layers of γ and α2 phases, where a high densification could be reached.
For fine-grained binary TiAl alloys, the room temperature elongation to fracture varies with Al-content, exhibiting a maximum at the two-phase composition Ti–48Al [3-4].
Microstructural varieties numbered 1 to 5 represent regions where EDS analyses were performed (Table II).
This structure is characterized by the presence of γ grains and lamellar colonies of alternating layers of γ and α2 phases.
(d) A duplex microstructure was obtained by hot pressing route characterized by the presence of γ grains and lamellar colonies of alternating layers of γ and α2 phases, where a high densification could be reached.
Online since: June 2020
Authors: Antônio Gilberto Costa
With respect to the granulation of the same, an increase in the grain size of the sandstones is observed for the quartzites, due to these recrystallizations, which confers greater resistance to the compressions and the physical wear for the latter.
Historically and among all Brazilian states, that of Minas Gerais is the one with the highest number of applications for quartzites, considering the historical constructions of the 18th and 19th centuries.
With few examples of applications in the South and Northeast regions, the largest number is concentrated in the Southeast and in this case the applications in some historical cities of the state of Rio de Janeiro stand out, especially in its capital, the city of Rio de Janeiro.
The first and most common, was named Phacoidal and is characterized by the presence of porphyritic crystals of feldspar in medium to fine - grained mass.
Sanding, as well as the loss of mass observed in sandstones, quartzites and even in granite rocks, were also considered to be consequences of these detachment of single grains or aggregates of grains.
Historically and among all Brazilian states, that of Minas Gerais is the one with the highest number of applications for quartzites, considering the historical constructions of the 18th and 19th centuries.
With few examples of applications in the South and Northeast regions, the largest number is concentrated in the Southeast and in this case the applications in some historical cities of the state of Rio de Janeiro stand out, especially in its capital, the city of Rio de Janeiro.
The first and most common, was named Phacoidal and is characterized by the presence of porphyritic crystals of feldspar in medium to fine - grained mass.
Sanding, as well as the loss of mass observed in sandstones, quartzites and even in granite rocks, were also considered to be consequences of these detachment of single grains or aggregates of grains.
Online since: January 2010
Authors: Cong Feng Jiang, Ying Hui Zhao, Jian Wan
Therefore, moving the power consumption control
mechanism from hardware-level to fine-grained software-level is indispensable and more promising for data centers with virtual machine environments, and has the potential to save more power
consumption.
Fine-grained dynamic voltage/frequency scaling is an important tool in managing the balance between power and performance in chip-multiprocessors [20, 21].
Kim et al [22] explored the potential system-wide energy savings offered by implementing both fine-grained and per-core DVS/DFS in a 4-core CMP system.
Therefore, more power reduction can be achieved if fine grained DVS/DFS schemes are used elegantly in virtualization environments.
Due to the high-density of service consolidation and development of new applications and the increasing number of users with heterogeneous requests, providing users with QoS guarantees while executing applications and saving power consumption has become a crucial problem that needs to be addressed.
Fine-grained dynamic voltage/frequency scaling is an important tool in managing the balance between power and performance in chip-multiprocessors [20, 21].
Kim et al [22] explored the potential system-wide energy savings offered by implementing both fine-grained and per-core DVS/DFS in a 4-core CMP system.
Therefore, more power reduction can be achieved if fine grained DVS/DFS schemes are used elegantly in virtualization environments.
Due to the high-density of service consolidation and development of new applications and the increasing number of users with heterogeneous requests, providing users with QoS guarantees while executing applications and saving power consumption has become a crucial problem that needs to be addressed.
Online since: June 2017
Authors: Jie Hou, Jian Xin Dong
The average grain size of the alloy is 40 μm.
In addition, the formation of carbides on the grain boundaries occurs during the heat treatment.
Comparing the microstructures of the two specimens, it can be seen that there are some differences in the sizes, morphologies and number densities of the γ′ phases and carbides, which is probably due to the sampling positions from the material.
Generally, with the increase of size and number of sharp angles, the stress concentration induced by carbide and carbonitride inclusions increases, which may encourage crack initiation and growth.
This is common in superalloys because grain boundaries are weak at elevated temperature, and the carbides precipitated on the grain boundaries may also assist the propagation of intergranular cracks.
In addition, the formation of carbides on the grain boundaries occurs during the heat treatment.
Comparing the microstructures of the two specimens, it can be seen that there are some differences in the sizes, morphologies and number densities of the γ′ phases and carbides, which is probably due to the sampling positions from the material.
Generally, with the increase of size and number of sharp angles, the stress concentration induced by carbide and carbonitride inclusions increases, which may encourage crack initiation and growth.
This is common in superalloys because grain boundaries are weak at elevated temperature, and the carbides precipitated on the grain boundaries may also assist the propagation of intergranular cracks.
Online since: November 2022
Authors: Zahoor Ahmad, Sadia Sharif, Clare Hoskins, Muhammad Aziz Choudhary, Arshad Mehmood
Changchao Jia and co- workers synthesized Ag NWs and NPs using glycerol and EG as solvents where large number of Ag nanoparticles (NPs) and few Ag NWs were observed [14].
These geometries have definite grain boundaries which are amorphous in nature, therefore such endothermal heat at latent temperature is explicitly assigned for these domains.
Additionally, DSC highlighted the formation of significant grain boundaries, and these are more concentrated in the samples where ultrathin NWs are present and again where XRD phase distortion is seen.
Similarly, the existence of grain boundaries or amorphous domains mainly restrict electric conductivity, therefore these materials can find applications in the fabrication of diodes.
Acknowledgments The ORICMUST and HEC (Project Number:7183) Pakistan are gratefully acknowledged for the financial support to the study.
These geometries have definite grain boundaries which are amorphous in nature, therefore such endothermal heat at latent temperature is explicitly assigned for these domains.
Additionally, DSC highlighted the formation of significant grain boundaries, and these are more concentrated in the samples where ultrathin NWs are present and again where XRD phase distortion is seen.
Similarly, the existence of grain boundaries or amorphous domains mainly restrict electric conductivity, therefore these materials can find applications in the fabrication of diodes.
Acknowledgments The ORICMUST and HEC (Project Number:7183) Pakistan are gratefully acknowledged for the financial support to the study.
Online since: September 2009
Authors: Philippe Colomban, M.J.M. Gomes, M. Pereira, A. Mata, L.C. Alves, T. de Lacerda-Arôso
For both JP and PP samples, the polymerization index (Ip) has been calculated and the
wave number of the maximum of the Si-O stretching peak (νmax) has been collected.
JP blue, 3. white grain in JP blue, 4.
Grey grain in PP blue [C : Cassiterite, Q : αQuartz] (λexcitation = 531.9 nm).
Whatever is the colored blue shard considered in fig. 4, the Polymerization Index gave for Blue JP Ip=0.78~0.83 and Blue PP Ip=0.24, i.e. the Co ions contribute to decrease the number of connections in the Si-O-Si network.
Fig. 5a: Optical micrograph taken on the JP shard, in the white area.: White grains of SnO2 and grey grains of Quartz inside a glassy matrix.
JP blue, 3. white grain in JP blue, 4.
Grey grain in PP blue [C : Cassiterite, Q : αQuartz] (λexcitation = 531.9 nm).
Whatever is the colored blue shard considered in fig. 4, the Polymerization Index gave for Blue JP Ip=0.78~0.83 and Blue PP Ip=0.24, i.e. the Co ions contribute to decrease the number of connections in the Si-O-Si network.
Fig. 5a: Optical micrograph taken on the JP shard, in the white area.: White grains of SnO2 and grey grains of Quartz inside a glassy matrix.