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The fatigue strength of the RS P/M Mg96.7Zn0.85Y2Al0.45 alloy was 325 MPa, which was similar to that of the RS P/M Mg97Zn1Y2 alloy. 250 300 350 400 450 1.0E+03 1.0E+04 1.0E+05 1.0E+06 1.0E+07 250 300 350 400 450 1.0E+03 1.0E+04 1.0E+05 1.0E+06 1.0E+07 Fig.4 Fatigue strength of RS P/M Mg96.7Zn0.85Y2Al0.45 and Mg97Zn1Y2 alloys Stress, σ / MPa Number of cycles to failure, �f RS P/M Mg96.7Zn0.85Y2Al0.45 RS P/M Mg97Zn1Y2 450 400 350 300 250 1.0E+03 1.0E+04 1.0E+05 1.0E+06 1.0E+07 Figure 5 shows images of the surfaces of the RS P/M Mg96.7Zn0.85Y2Al0.45 and Mg97Zn1Y2 alloy samples after the salt spray test.
The grain size of this alloy was about 200 nm, which was similar to that of the RS P/M Mg97Zn1Y2 alloy.
Grain refinement occurred due to dynamic recrystallization during extrusion, and the existence of the LPSO phase in the matrix was observed.

Ferroelectric crystals possess regions with uniform polarization within their grains called ferroelectric domains at temperatures below their Curie temperature (TC).
Dipole directions are defined by the crystallographic structure and symmetry and are thereby limited to specific directions within a grain.
Acknowledgments This research is supported by the NIST ATP Grant Cooperative Agreement Number 70NANB2H3028 and the National Science Foundation Grant No.

., LTD and jiangxi university of technology over the past two decades, the integrated use of physical chemistry, wet metallurgy, powder metallurgy, transmission theory science theory system, the hydrometallurgical principle of the wolframite and scheelite were deeply and systematically studied , self-developed a number of key technologies [1-2], and the high efficiency and clean technology to produce high performance APT from wolframite and scheelite were first realized at home and abroad, the tungsten smelting metal yield was greatly improved, the cost of the auxiliary materials was reduced, the waste water, waste gas can reach the standard of drain.
Due to long-term no ascertain the rule of APT crystallization kinetics, the crystallization process can not be controled, the good particle size performance (grain size, particle size distribution, apparent density, liquidity) and morphology (single crystal, spherical crystal)of the APT powder can not be produced at home and abroad; Due to the cost and the technical bottleneck, nanometer tungsten powder and tungsten carbide powder can only be produced in the experimental research stage, which seriously restricted our country high-end tungsten material production.The production of high performance APT is a difficult problem in the world.
(3) The proprietary control technology of APT property First developed the suspended-laminar crystallization technology, grain spheroidizing technology, low temperature-active surface technology.

On the other hand, doped LiNbO3 single crystal has already been used practically, and there are large number of application such as surface acoustic wave (SAW) element using the excellent piezoelectric effect, and optical modulation such as quasi-phase matching (QPM) waveguide multiplier using the good nonlinear optical effect.
Therefore, the developed ceramic grains during sintering step are tend to become rod-like rather than spherical in shape, and especially the research, in which piezoelectric property is improved by using grain orientation technique, is frequently conducted in this material system.

The resulting sequence can be written as A1B1C1A2B2C2A1… where the letters (ABC) indicate the Ni Nb geometric position of the atoms and the numbers (12) their chemical nature.
Results and discussions In the present study the observations made on grains containing quite large " precipitates are reported, since SFs are commonly observed in such large precipitates.
In the different grains, that were objects of study, the presence of the three possible " variants in the form of circular plates (about 100 nm in diameter and 20 nm thick) was noticed.

Under the wave and the tide, the fine grain granules were constantly brought to the offshore, and the rough granules were left.
Table 1 Parameters of silt in the Yellow River Delta Speci- fic Gravity Water content (%) Wet unit weight (kN/m3) Void ratio Saturation (％) Li- quid limit (％) Plastic limit (％) Cohesion (kPa) internal frictio- nal angle compres- sion coeffi- cient (Mpa-1) grain size composition (%) sand soil clay 2.69 24.41 19.88 0.68 96.78 27.93 19.7 7.36 33.65 0.11 4.2 87.6 8.2 The W3ZB-20 type triaxial apparatus was taken to finish this test, which has stress control mode and be used to simulate the sine wave loading, and the test vibration frequency was 1Hz.
(1) The silt soil's axial strain was increased gradually along with the number of the circular vibration, and the relationship between them was basically linear

The heat treatment of the plate caused recrystallization of titanium grains and decarburization of the steel part without grain reconstruction (Fig. 3).
Decision number: DEC-2012/07/N/ST8/03123 References [1] T.

Because the σ phase is easy to precipitate at the grain boundary, the σ and Laves phase line intersections are avoided in the composition design, and the appropriate aging temperature is determined to avoid precipitation of σ phase.
It can be seen from Fig. 7(a) that a large number of fine, dispersed secondary phases are precipitated on the martensite lath.
Ju, Grain boundary embrittlement by μ and σ phases in iron-base superalloys, Acta Metallurgical Sinica 17(1) (1981) 1-114

The alloy microstructures, used in medical applications, is define by crystallographic orientation, texture, morphology, distribution, size and number for existing phases [5-6]. 2.
The fragile break produce slicing in a plan perpendicular to request plan and have crystalline aspect (the fracture are initiate on grain limits with appearance of cleavage plans).
The micrographs for CoCrMoSi6 alloy highlights, at big magnitude (1000X and 2000X), small areas with carbides in matrix and the alloy structure becoming with a non-uniform grains and an inter-dendritic eutectic, with different crystallographic orientations.

Compared with the diffraction pattern of the powder sample, the peak number of the bulk sample decreased obviously.
The strongest peak corresponding to crystal face also changes from (420) to (444), in the meanwhile, the intensity ratios of peaks on several crystal faces, such as (211), (532) and (642), to that on (420) crystal face increase significantly, demonstrating that the crystalline grains grow with several preferred orientations and a dominant one (444) in the bulk YAG glass ceramics.
The SEM micrograph of cross-section of Sm3+ doped YAG glass ceramics is shown in Fig. 5, and the grain sizes of the YAG crystals are estimated in the range of 3~15mm.