Search results

According to [3], the natural gas is considered sour if the amount of H2S is present greater than 5.7 milligrams per normal cubic meters (mg/Nm3) or 0.25 grains per 100 standard cubic feet (gr/100scf).
This paper was only covers for the number of trays and solvent circulation rate.
The effects of number of trays to acid gases—The effects of number of trays to the acid gases compositions were shown in Figure 4, Figure 5 and Figure 6.
Figure 4: Stage number vs.
Figure 5: Stage number vs.

But there are equiaxed grains in the fusion zone(FZ) of sample B and sample C.
It prompts the formation of equiaxed grains in the fusion zone.
Fast cooling rate and crystallization rate can also contribute to refine the size of the grain in the fusion zone[4].
This is due to the coarse grain in fusion zone and the existence of HAZ.
The size of the grains in the fusion zone of the hybrid welding is smaller

A number of different interfaces based on the same network interface have been developed for a range of sensors and applications.
This material was subjected to SPD to examine the effects on the coarse grained and heavily cored as-cast microstructure.
The depth of corrosion is strongly defined by the size of the cored regions and therefore also the grain size.
Further work is planned to determine the grain size of the SPD material and to characterise its mechanical properties.
At maximum speed the miniature device operated at a Strouhal number of 0.28, which is near the optimum range identified from studies of several fish species.

They contain a large number of iron-containing components and rocks that can be used as building materials.
The industrial approbation of the use of fine-grained tailings of enrichment as components of the mixture was carried out by us in the production of fine-grained concrete and asphalt concrete.
As an additive to fine-grained concrete, enrichment tails with a fineness of 2% of the residue on a 0.315 mm sieve were introduced.
The surface of mineral powder accounts for up to 90-95% of the total surface of mineral grains that make up the asphalt concrete.
Grain composition of the screening of granite.

Porous implants were sintered of three different grain size fractions of two established bioactive glasses.
Results For both glasses the densification was faster when using smaller grain size fractions and higher temperatures.
The standard deviation is somewhat higher at the lower porosities due to the low number of pores in each sample.
A smaller grain fraction leads to a denser structure than a larger fraction if sintered under the same conditions.
At the same porosity level crushed glass with a small grain size (300-500 µm) leads to a structure with smaller sized pores but a larger number of them than a coarser grain size.

Fabrication of homogeneous UFG microstructures by ECAP is a complex process since the number of passes and the selected processing route can be important parameters.
%Co alloy [5,6] showed that significant changes in grain size and in characteristics of grain boundaries occur after several ECAP passes.
A comparison with pure Cu showed that the grain size homogenization was shifted towards higher number of ECAP passes.
Fine dispersion of precipitates further slowed down the grain refinement and grain size homogenization during ECAP processing.
EBSD orientation maps reveal inhomogeneous microstructure with areas of submicron grains next to areas with larger grains subdivided by low angle boundaries.

Based on the grain movement model of ultrasonic grinding, models representing the grinding force of single abrasive and the material removal rate (MRR) are deduced and verified.
d� U T d Ultrasonic vibration direction Velocity of worktable Abrasive grain y x Amplitude Spindle speed U Spindle speed f,u wV sV sV 8 lC d hC Ultrasonic vibration direction f,u Worktable feed direction Fig.3 Diagram of chip formation Fig.4 Material removal volume of a grain Table1 Properties of fine-crystalline zirconia ceramics Ceramics Flexiblestrength [MPa] Fracture toughness [MPa 1 2 m⋅ ] The Vickers hardness[Gpa] The grain size of material [nm] Density [g/cm3 ] ZrO2 1150 8 11.1 <500 5.71 Experimental Results and Analyses Grinding experiments were conducted using a GTS6016 Ultraprecision surface grinder with an ultrasonic generator.
The high grinding efficiency results from the fact that the grains and vibration amplitude, make one side of themselves contact workpiece discontinuously during most of grinding time.
And the effect of the acoustic cavitation of cooling emulsion and peening of detached grains contributes to material removal.
The grain size can greatly affect the surface roughness.

However, the grinding process might be quite costly providing the parts with shape complexity should be finished because a number of production steps are needed.
One is its low flexibility; if processing a certain machine part with complicated shape, several sizes of grinding wheel and, hence, a number of setups should be needed.
PcBN is a composite of cBN grains bonded with binder material by sintering.
Moreover, it is found that obtained edge has no surface defects such as drop-off of cBN grains.
These scratch grooves were generated by abrasion by hard particles such as wear debris or cBN grains from the tool itself.

It makes the grain refinement and basal texture weaken [10-17].
Dynamic recrystallization was taken place in the DSR sheets and the grain size is refined obviously than it of CR sheets when pass thickness reduction is 5%, but the grain structure is heterogeneous.
When it up to 15%, the number of deformation bands was increased, the grain refinement is obvious.
The microstructure almost transformed into small equiaxed grains.
Material strength is influenced by grain size, grain orientation and second phase characteristic.

The Ti-6242 BM consists of globular grains with an average grain size of 3.4 µm ±1.2 µm (Fig. 3(b)).
This means that a large number of grains are oriented in the <1 0 -1 0>//ND direction, which is confirmed by the recalculated inverse pole figure showing a maximum axis intensity of H = 5.7 mrd at the <1 0 -1 0>//ND corner).
The thermal cycling during the LBW of the Ti-6242 and the subsequent cooling resulted in a transformation of the equiaxed grains into acicular grains and embedded globular grains (Fig. 3(c)).
The HAZ formation was associated with a grain refinement to an average grain size of 2.1 µm ±0.7 µm and an increase in the b-phase content to 11.9 %.
The HAZ adjacent to the BM consisted of globular grains.