Search results

As the raw grain processing, the problems of foodstuffs storage deterioration gradually appear, it will affect the enterprise operation costs.
Introduction Food processing refers to the processing of grain into semi-finished products and refined grain, or semi-finished food into refined grain.
Food processing mainly include: paddy rice; wheat flour; the vegetable oil extraction, refining and processing; comprehensive utilization of grain products; etc..
Perishable inventory models with fixed leadtime and lifetime are far more complicated than models with exponentially distributed leadtime and lifetime, since the Markovian property of the stochastic process describing the number of items in stock is lost.
Conclusions With the development of grain processing, the inventory management of foodstuffs, aging and deterioration were difficult to avoid.

And the defects such as porosity, segregation and coarse grains decrease, thereby improving the quality of the ingot [1-5].
Furthermore, the area of the equiaxed grain zone becomes larger and larger, and the grain size in the zone decreases continuously [3].
When the feeding ratios are same, the higher the superheat is, the larger the proportion of columnar grain zone is [3].
Furthermore, the steel strip-feeding can increase the propotion of equaxied grains and reduce the size of equiaxed grains.
Then the crystal nuclei reduce during solidification and the number of equaxied grains obtained decreases.

It is incongruent dissolution process, analogous to weathering of magmatic rocks and minerals grains.
Here belong the feldspar as a source of potassium, amphiboles and pyroxenes, which supply magnesium, iron, a portion of calcium and a number of microelements.
Pieces of glass and grains of 0.1-0.3mm size were mixed with greenhouse soil and maintained there 8 or 16 weeks at the temperature 22-25 0C.
Plants can grow in pure, grained glass as an artificial soil.
Beam (phaseolus vulgaris L.) grain roots are intensively growing down in grained glass as soil substrate.

A high number of cracks began to observe in the layer formed at 30 V, while only a few cracks were revealed on the layer formed at 40 V.
The optimum voltage to produce a thick HA layer with a small number of cracks was at 40 V.
The layers were porous and consisted of HA grain with a variety of sizes and shapes.
The short pre-sedimentation time of the suspension prior to EPD resulted in a micro scale of HA grain.
Despite the thickening, agglomeration of the HA grain occurred during the EPD process.

Yttrium aluminum garnet (YAG) materials have a number of unique properties, such that its application is extensive.
The precursor agglomeration is severe, such that the grain growth is significantly affected.
Thus, the phase transition is sufficient, which is favorable for the grain growth of pure phase YAG.
When the powder is completely crystallized, large grains are formed by the surface reaction between small grains, surface diffusion, or volume diffusion [10-12], which requires high energy from the system, thus increasing the effect of calcination temperature on grain size and grain shape.
Jiang, Unique mechanical properties of nano-grained YAG transparent ceramics compared with coarse-grained partners, Mater.

Haque and Saif [6] showed that intrinsic length is not a fixed parameter and depends on the mean grain size d.
Burger’s vector, and grain size), and macro geometrical characteristic scale of specimens (e.g. size, and shape) [14].
It is showed that the harder the material is (work hardened or smaller grain size), the smaller the intrinsic length is [10].
The specimen numbers and its compositions for various are shown as Table 3.
The specimen numbers and its compositions for various are shown as Table 5.

Ma School of Materials Science and Engineering, Northwestern Polytechnical University Xi'an, China a wangmin@nwpu.edu.cn, bdwj02@sohu.com, chzguo@nwpu.edu.cn Keyword: fined grain, surperplastic diffusion bonding (SP/DB), brittle phase, fracture Abstract.
According to the research background of the bonded parts of titanium alloy and stainless steel used in aerospace industry, direct fined grain SP/DB of TC4/1Cr18Ni9Ti was investigated.
The fined grain of TC4 with α-grain of 2~5µm and 1Cr18Ni9Ti with γ-grain of 5~8µm were shown in Fig.1.
Fig.1 Microstructure of fined grain of TC4 (a) and 1Cr18Ni9Ti (b) Put pre-pressure on grinded and cleanded specimens and heat to the superplastic deforming temperature, keeping for a period of time.
Microhole is difficult to avoid, but its number and size is less than those of mechanical bonding area.

The Harmonic Structure is composed of soft, coarse-grained regions, designated as the Core, which are surrounded in three dimensions by an interconnected network of hard, ultra-fine grain regions, referred to as the Shell.
Harmonic Structure (HS) is a structural model in which coarse grains (Core) are distributed in islands and fine grains (Shell) exhibit a three-dimensional network structure.
In the BiM Time Process, the ratio of coarse and fine grains was fixed at 3:2, and the processing time was 10, 30, and 50 hours, respectively.
Fig. 8 Relationship between UTS and uniform elongation of each Homo, HS, BiM compacts. 3. 3 BiM Powder Ratio As illustrated in Figure 9, the EBSD IQ+GB map of the sintered compact produced by BiM demonstrates a variation in the ratio of coarse grains to fine grains.
Acknowledgment This work was supported by JSPS KAKENHI Grant Numbers JP 18H05256, 18H05455 and 24K01202.

In the Al-Ti-B master alloys, the shape, size of TiAl3 and the dispersion of TiB2 has significant effect on the grain refinement.
The TiB2 phase becomes the determining factor of effective nucleation number of α-Al [2].
In the Al-Ti-B master alloy adding rare earth alloy After adding with different content of rare earth, the microstructure grain group of alloy each are not identical.
But if RE content also shoulds not be too tall, if too much it’s easy to form the aluminum titanium REcomposite with TiAl3, reduce the number of TiAl3 refinement phase particles.
When the RE content too high ,it is easy to form AlTiRE complex phase with TiAl3, so reducing the number of refinement phase particles TiAl3.

The fusion zone consists of small grains, whose size is heterogeneously distributed.
Laser beam welding of specified aluminum alloys has been approved for a number of applications.
The equiaxed grains are about 5~20 μm in size.
Higher magnification by SEM of the joint revealed second phase particles both on the grain boundaries and in the grain interiors.
The microstructure of the fusion zone has been found to be very fine equiaxed grains, and the second phase on the grain boundaries or in the grain interiors being identified as MgZn2 compounds.