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Online since: May 2011
Authors: Ya Wei Zhang, Jing Yu, Yun Lian Song
Characteristics of Aeolian Sand Aeolian sand in the Horqin desert sand is fine-grained, and it is without viscidity and plasticity.
The test results shows in Table 1, the CBR of aeolian sand is functions of its water content and dry density γ, and hammering the number [6].
Online since: May 2011
Authors: You Feng Zhang, Jun Li
A number of studies in recent years have concentrated on powder metallurgy based processing of boride reinforced Ti-alloy composites [1–6].
So, fine-grained matrix microstructure was significant formed in composite coatings.
Online since: May 2012
Authors: Xue Jun Wang, Xing Li Geng
EDEM is a discrete element program that has the ability to model entire boundary value problems directly with a large number of particles.
Particles Stress Tamping pines at different frequencies, through observation of the grain total stress condition, in the way of ballasted particles in tamping pines the process of vibration and gripping, the stress of the particles are increased gradually.
Online since: January 2012
Authors: Jian Bin Xie, Tian Chun He, Jing Fan, Chun Feng Tang
As there were no fly ash, volcanic ash or other admixtures at the local area of the project, one replacement method that applying the fine-grained limestone powder and the water quenched iron slag (abbreviate to double admixtures) instead of fly ash as concrete admixtures has been proposed [2,3,4] .
There are 20 in situ shear strength test specimens, in which10 specimens were used separately in hot rise and cold rise layer that are numbered A1-A10, B1-B10.
Online since: December 2011
Authors: Zhi Jian Zhang, Nai Chao Si, Guang Lei Liu, Song Hai Si
Table 1 Middle Heat-Treatment Method number Heat-treatment Temperature/℃ keep heating Time/min cooling method 1 380 30, 60, 120, 180 water quenching 2 400 30, 60, 120, 180 water quenching 3 430 30, 60, 120, 180 water quenching 4 460 30, 60, 120, 180 water quenching 5 490 30, 60, 120, 180 water quenching Results and Discussion Influence on superelasticity of experimental wires by different aging treatment The tensile tests were taken after the experimental wires were holding 30min, 60min, 120min and 180min respectively at 380℃.
Futhermore, it can be seen that the superelasticity will be destoryed for too long sintering time because of the growth of the Ti3Ni4 grains and the decline of the density of the dislocation.
Online since: May 2010
Authors: Berend Denkena, Bernd Breidenstein
In order to estimate the scattering of the residual stress after each process step, a large number of residual stress measurements of commercially manufactured carbide indexable inserts, PVD-coated with (Ti,Al)N, has been performed.
Etching removes the cobalt binding material, leading to a release of the WC grains, which causes a decrease of compressive stress.
Online since: August 2007
Authors: Bjørn Clausen, E. Wen Huang, Lee M. Pike, Yan Dong Wang, Hahn Choo, Michael L. Benson, Peter K. Liaw
Hutchings [7] and Šittner [14] reported that the evolution of the peak-width is due to the change of the number of scattering sites.
Jakobsen [15] et al. reported that changes of the peak-widths come from the changes of the substructures of the grains.
Online since: September 2007
Authors: Nobusuke Hattori, Shinichi Nishida, Cong Ling Zhou
But cracks initiated in the ferrite grains for all of the pre-strained and non-pre-strained specimens, and there is no effect on the crack branch point.
S-N curves 105 106 107 108 120 130 140 150 160 170 180 190 200 210 220 230 240 250 Stress amplitude, MPa Number of cycle to failure εp= 0% εp= 2% εp= 5% εp= 8% εp=12% εp=22% 0 5 10 15 20 25 30 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 Fatigue limit ratio Pre-strain ratio, % εp= 0% εp= 2% εp= 5% εp= 8% εp=12% εp=22% Fig. 3.
Online since: March 2006
Authors: Yong Qiang Liu, Peng shao Yu Qi Wu, Wen Ming Gao, Yong Zhang
Fresh concrete and cement mortar are suspended gels and they are semisolid during graining process.
From the cavity surface it can be seen that there are a larger number of radial cracks around the cavity, the deepness of them are from 1cm to 2cm.
Online since: October 2011
Authors: Chang Zheng He, Kun Jie Duan, Li Jun Heng
The hydraulic diameter (defined as H) and the turbulence intensity (defined as I) are calculated separately using the below formulas: (1) (2) where, A is the burner jet orifice area, χ is the interface perimeter, Rh is the hydraulic radius, Re is the entry Reynolds number.
The coal consumption is set according to operation parameters and the particle size of pulverized coal is empirical data or grain-size analysis result of the coal sample.
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