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Online since: February 2012
Authors: Jan Herper, Dirk Biermann, A. Erman Tekkaya, Wolfgang Tillmann, Lukas Kwiatkowski, Eugen Krebs, Peter Sieczkarek
These films exhibit a decrease of the grain size and an improved finer microstructure with an increase of the aluminum content.
Fig. 8 Comparison of the process forces: a) tool type A – increasing number of steps, b) tool type A and B – after 5 and 40 steps Conclusions and Outlook In this article, an improvement of an incremental forming process, using bionic microstructures and hard coatings, is presented.
Fig. 8 Comparison of the process forces: a) tool type A – increasing number of steps, b) tool type A and B – after 5 and 40 steps Conclusions and Outlook In this article, an improvement of an incremental forming process, using bionic microstructures and hard coatings, is presented.
Online since: January 2007
Authors: Hitoshi Ohmori, Yoshihiro Uehara, Wei Min Lin, Shao Hui Yin
However, surface produced by fixed abrasive grinding of optical materials is characterized by
considerable sub-surface damage, micro-crack (on the order of the abrasive grain size).
The soft specifies angles and accelerations for the angle controller, the number of sweeps required between positive and negative angles, and the total estimated processing time.
The soft specifies angles and accelerations for the angle controller, the number of sweeps required between positive and negative angles, and the total estimated processing time.
Online since: May 2011
Authors: Hong Zhou Ma, Zhao Hui Zhang, Jian Tao Ju, Fu Cai Zhao, Bai Long Liu
This is due to the existence of a large number of arsenate has impact on the aurum extraction reaction.
When grain size of -200 mesh are 90% of all in the arsenic gold, the optimum conditions for fixing arsenic roasting process are obtained through the experiments above: the amount of CaCO3 is 3%, the roasting temperature is 650℃ and time is 4 h.
When grain size of -200 mesh are 90% of all in the arsenic gold, the optimum conditions for fixing arsenic roasting process are obtained through the experiments above: the amount of CaCO3 is 3%, the roasting temperature is 650℃ and time is 4 h.
Online since: January 2012
Authors: Michel Gerland, C. Belamri, N. Benyahia, Andre Rivière
The previously described non-thermally activated effects are generally linked to the thermoelastic effect due to the temperature change between the compressed and dilated part of the grains for a polycrystalline sample during the internal friction experiment.
This transformation concerns a larger number of atoms for increasing temperature and the effect is increasing.
This transformation concerns a larger number of atoms for increasing temperature and the effect is increasing.
Online since: May 2011
Authors: Xue Qing Liu, Ji Yan Liu
The nature of the silica, their distribution, dimensions, the hydroxyl group number on the surface, the polymer HTadhesioTHn and shape have been related to the final properties and application of nanosilica reinforced epoxy composite.
It can be observed that agglomerate is departed, most of the grains are spherical with size ranging from 30 to 50 nm, they stick slackly each other and there are many interstitial between particles.
It can be observed that agglomerate is departed, most of the grains are spherical with size ranging from 30 to 50 nm, they stick slackly each other and there are many interstitial between particles.
Online since: March 2006
Authors: J.Z. Liu, Xue Ren Wu, B.R. Hu, L.F. Wang, B. Chen
The microstructures of the three areas are significantly different,
the grain sizes being the largest in the HAZ.
Crack initiation sites Number Percent TA15 sheet 1 4.4% Weld zone 7 30.4% HAZ 15 65.2% Fig.3 Fracture of welded specimens Table 2 Statistics of crack initiation sites Through macroscopic observation and statistical analysis of the tested specimens, it was found that most of the fatigue cracks were initiated at weld defects such as voids and inclusions in the HAZ and at the edge of the weld.
Crack initiation sites Number Percent TA15 sheet 1 4.4% Weld zone 7 30.4% HAZ 15 65.2% Fig.3 Fracture of welded specimens Table 2 Statistics of crack initiation sites Through macroscopic observation and statistical analysis of the tested specimens, it was found that most of the fatigue cracks were initiated at weld defects such as voids and inclusions in the HAZ and at the edge of the weld.
Online since: May 2010
Authors: Giovanni Bruno, Alexander M. Efremov, Bjørn Clausen, Andrey N. Levandovskiy, Irina Pozdnyakova, Darren J. Hughes
Heap et al.[4] found a variation of
both Young's modulus and Poisson's ratio of basalt rocks as a function of cycle number in alternate
loading.
This is basically due to the fact that microcracking (which is a discrete phenomenon) releases microstresses and therefore unloaded grains coexist with overloaded ones
This is basically due to the fact that microcracking (which is a discrete phenomenon) releases microstresses and therefore unloaded grains coexist with overloaded ones
Online since: July 2011
Authors: Zainovia Lockman, Abdul Razak Khairunisak, Rabizah Makhsin Siti
WO3 also possesses good photons absorbability because tungsten has a high atomic number element which is 74 and can absorb photons radiation effectively [6].
Increasing oxidation temperatures to 500°C causes seeds to grow into large grains with random distribution.
Increasing oxidation temperatures to 500°C causes seeds to grow into large grains with random distribution.
Online since: April 2015
Authors: Rui Yang, Zheng Guan Lu, Yu You Cui, Lei Xu, Jie Wu
As Figure 7 shows, the spectral peaks of CO2 corresponds to the 2300~2400 cm-1 wave number, and the spectral peaks of H2O corresponds to the obvious peak groups on both sides around 1500 cm-1 and 3750 cm-1.
Comparing these two SEM images, the grain size of PM alloy is much finer than as-cast alloy.
Comparing these two SEM images, the grain size of PM alloy is much finer than as-cast alloy.