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Online since: June 2012
Authors: Liang Li, Rong Bian, Eleonora Ferraris, Dominiek Reynaerts, Ning He, Jun Qian
They are made of fine grain tungsten carbide and supplied by Van Hoorn Hardmetaal BV; they are further coated with diamond via chemical vapour deposition (CVD) by Oerlikon Balzers AG, to protect the tools against abrasive wear.
Test n vc ap fz ~hmax ID (rpm) (m/min) (μm) (μm) (μm) Group 1 TC1 38000 120 2 1 0.62 Group 2 TC4 38000 120 2 3 1.58 Group 3 TC3 38000 120 2 5 1.99 Group 4 TC6 38000 120 4 1 0.84 Group 5 TC5 38000 120 4 3 2.39 Group 6 TC2 38000 120 4 5 3.55 Table 3 Number of layers and cumulative cutting length of each group samples Sample ID. n1 n2 n3 n4 n5 n6 No. of milling layers 6 6 48 40 40 40 Cumulative cutting length, lc (mm) 66 132 660 1100 1540 1980 Experimental Results and Discussion Tool Wear Characters.
Test n vc ap fz ~hmax ID (rpm) (m/min) (μm) (μm) (μm) Group 1 TC1 38000 120 2 1 0.62 Group 2 TC4 38000 120 2 3 1.58 Group 3 TC3 38000 120 2 5 1.99 Group 4 TC6 38000 120 4 1 0.84 Group 5 TC5 38000 120 4 3 2.39 Group 6 TC2 38000 120 4 5 3.55 Table 3 Number of layers and cumulative cutting length of each group samples Sample ID. n1 n2 n3 n4 n5 n6 No. of milling layers 6 6 48 40 40 40 Cumulative cutting length, lc (mm) 66 132 660 1100 1540 1980 Experimental Results and Discussion Tool Wear Characters.
Online since: December 2012
Authors: Yu Min Han, Yan Ling Liu, Guo Wen Che
Introduction to Test Road [1]
In the test engineering of the peat soil roadbed, large numbers of observation instruments are buried to implement multiple test observations such as the total settlement, lamination settlement, lateral surface, vertical displacement, deep lateral displacement, and Pore water pressure, water level and soil pressure.
Third, the secondary consolidation settlement (Ss) is mainly caused from the soil-grain surface to combine water film and subsequently generate creep deformation, and will settle at an extremely slow speed over time.
Third, the secondary consolidation settlement (Ss) is mainly caused from the soil-grain surface to combine water film and subsequently generate creep deformation, and will settle at an extremely slow speed over time.
Online since: April 2008
Authors: Shi Hong Zhang, Zhou De Qu, Qun Zhang, Chen Lei
Physical metallurgical transformation consists of
dynamical recrystallization, grain growth and dynamic recovery.
For example the temperature data of file outputted by the Fig. 6 Temperature histories of the header, the middle and the tailor of the strip initial iteration read the number of nodes numnp f i rst node of el ement ?
For example the temperature data of file outputted by the Fig. 6 Temperature histories of the header, the middle and the tailor of the strip initial iteration read the number of nodes numnp f i rst node of el ement ?
Online since: July 2008
Authors: R.D. Knutsen, G. Kunene, Gonasagren Govender, L. Ivanchev, H.P. Burger
Although there are number of studies investigating the laser welding of wrought aluminium
alloys, there has been limited work on the laser welding of SSM formed A356 [5].
The strengthening mechanisms operating during welding and heat treatment of the aluminium alloy A356 are mainly dispersion hardening and grain boundary strengthening.
The strengthening mechanisms operating during welding and heat treatment of the aluminium alloy A356 are mainly dispersion hardening and grain boundary strengthening.
Online since: April 2009
Authors: Yvan Houbaert, Rafael Colás, Martha Patrizia Guerrero-Mata, Maribel de la Garza, Mayra Moreno, Patricia del C. Zambrano
The results show an
average grain size of 5.6 m (ASTM 12), the hardness was 74.7 in Brinell scale.
An equation to calculate the Fe content on the zinc coating was developed during this work as follows: t n i iFei Fe * (1) Where i is the thickness of each phase, t the total thickness and n the number of phases within the coating.
An equation to calculate the Fe content on the zinc coating was developed during this work as follows: t n i iFei Fe * (1) Where i is the thickness of each phase, t the total thickness and n the number of phases within the coating.
Online since: May 2004
Authors: K. Mwamba, Paul-Henri Duvigneaud, M. Verwerft
Their mass distribution follows roughly a double humped distribution centered
on mass numbers 95 and 135.
Owing to its congruent melting at 1457°C, this wetting phase leads to dense microstructures with large grains in most compositions
Owing to its congruent melting at 1457°C, this wetting phase leads to dense microstructures with large grains in most compositions
Online since: April 2005
Authors: Gary Scott Collins, Matthew O. Zacate
Each 12(d) site has six neighboring 12(d) sites to which a tracer is
likely to jump; however, the relation w=λ still applies, independent of the number of neighbor
sites, within the approximation given by eq. 2 and Baudry and Boyer's expression for λ.
Two sets of diffusion coefficients D1 and D2 that were believed to correspond to volume diffusion and grain-boundary diffusion [11] were given for each phase.
Two sets of diffusion coefficients D1 and D2 that were believed to correspond to volume diffusion and grain-boundary diffusion [11] were given for each phase.
Online since: July 2012
Authors: Xiang Hui Hou, Kwang Leong Choy, Rosniza Hussin
The self-limiting behaviour of each ALD cycle can precisely control the thickness of the performing film by the desired number of cycles [17].
The crystalline quality of the grain also increases with the deposition cycles.
The crystalline quality of the grain also increases with the deposition cycles.
Online since: October 2010
Authors: Ru Xin Che, Bing Yu, Shuo Wang
Fig. 1 Test device
Table 1 Test scheme
The serial number of experiments
Reaction temperature(℃)
Reaction time
(min)
Temperature import ing air(℃)
Air flux
(ml/min)
Time importing
air continuously
(min)
1
300
60
100
100
30
2
300
60
100
500
30
3
300
60
250
500
30
4
350
60
100
100
30
5
350
60
100
500
30
6
350
60
250
500
30
7
400
60
100
100
30
8
400
90
100
100
30
9
400
180
100
100
30
Characterization
The experimental techniques that were employed in our investigations included: thermal analysis (by TG-DTA 449e, Germany), crystallographic-structure analysis (by XRD RINT-2100-UItima+), and misstructure analysis (by TEM JEM-IOO CX).
Measured by specific surface area, the size of spherical particles were 20.5, 22.1 nm, and particle sizes were 19.6, 20.1 nm by Scherrer formula, thus it can be seen that the particle size of γ-Fe2O3 has a little difference with primary particle, thus the primary particle is crystal grain.
Measured by specific surface area, the size of spherical particles were 20.5, 22.1 nm, and particle sizes were 19.6, 20.1 nm by Scherrer formula, thus it can be seen that the particle size of γ-Fe2O3 has a little difference with primary particle, thus the primary particle is crystal grain.
Online since: July 2010
Authors: Moussa Karama, Mohamad Ali, Bernard Lorrain, Bernard PUEL
These
technologies of assemblies require a great number of fasteners accompanied by as many installation
operations, also the adaptation of tools to reach all the places of the cubicles.
E (GPa) ν Re : yield stress (MPa) Rm : rupture limit (MPa) 200 0. 3 200 270 à 420 Table 2: Mechanical characteristics of the material The adhesive 7240 B/A is charged with the grains of glass of 200 micrometer diameter to gauge the thickness of adhesive layer.
E (GPa) ν Re : yield stress (MPa) Rm : rupture limit (MPa) 200 0. 3 200 270 à 420 Table 2: Mechanical characteristics of the material The adhesive 7240 B/A is charged with the grains of glass of 200 micrometer diameter to gauge the thickness of adhesive layer.