Search results

High dislocation density and dislocation cell structure in ferrite phase can be seen in Fig. 4 a), and Fig. 4b) shows moiré image, which means that there are high density of dislocation and some very small nano sized crystalline grains in ferrite phase.
Cemetite is orthogonal structure, there are a litter dislocation slip systems, so cemetite can deform only by fragmentizing, and the amorphous region can be generated by local plastic deformation under a complex stress field during drawing because of a small number a) b) Fig. 4 TEM micrographs of the wire with strain 1.90 a) Light field image; b) HRTEM image of ferrite phase amorphous Fig. 5 HRTEM image of cementite of slip systems in the cemetite phase.
Fig. 6 is the IPF maps for the several wires with different drawing strains, and which shows that the grains in the wires are drawn from equiaxed shape to fiber with drawing.

The research was carried out with five types of texture in 50x50cm models made from ready-mix C35/45 concrete with maximum aggregate grain size of 16 mm.
We used 50ml of calibrated sand with the grain size 0.15-0.3.
The sand patch method measurement results Sample number Patch diameter [mm] Roughness index Rn, mm 1 – smooth texture 392 0,41 2 – fluted texture 312 0,65 3 – burlapped texture 264 0,91 4 – rinsed texture 224 1,27 5 – brushed texture 210 1,44 Measuring the amount of undrained water on the sample The test was carried out in the following way: the sample was placed on an even and level surface and then it was raised with shims to obtain proper inclination.

The element Cr also plays a role of avoiding second sort tempering brittleness, improving hot strength, enhancing tempering stability and refining grain.
The element v plays a role of refining grain, causing secondary hardening, enhancing tempering stability and increasing wear resistance.
Cr:Mo=6:1 Fig.2 Distribution of Cr and Mo alloying layer on Q235 steel Table 1 Content of Mo, Cr on the alloying layer Figure number Cr: Mo The content of Cr, Mo on the surface The content of Cr, Mo from surface 30μm Cr Mo Cr Mo Fig.2 (a) 2:1 8.79% 19.17% 5.27% 10.61% Fig.2 (b) 3:1 9.45% 15.90% 2.62% 9.11% Fig.2 (c) 4:1 9.85% 14.69% 2.58% 7.01% Fig.2 (d) 6:1 11.31% 8.17% 6.36% 5.09% Analysis of the Microstructure of the Alloyed Layer.

On the other hand, several pristine grains without dislocations are seen in fig. 3(b).
In fig. 3(c), it is seen that small amount of Mg2Cu grown and several Mg grains were hydrogenated to MgH2 during heating process.
Acknowledgements This work was supported by JSPS KAKENHI Grant number 15K06519.

At the same time, a large number of high energy hydrogen atoms can be supplied to the full relaxation of the network, which is beneficial to the formation of silicon clusters in the silicon nitride matrix [8].
Based on this, HWCVD technology is used to control silicon grain size in Si-rich silicon nitride matrix by adjusting the flow of silane.
Therefore, Si-rich silicon nitride films with smaller silicon grain size can be prepared by reducing silane flow rate in HWCVD technique.

The two samples of number 1 and 2 (Fig. 3b) were taken at the flange and considered for chemical composition test and microstructural analysis, respectively.
The microstructure exhibits a single phase of austenite with twining and frees from all grain boundary carbides.
All the microstructures show uniform polyhedral grains of single phase alpha because copper and nickel are completely soluble in each other [9].

The main factors influencing the shape memory properties are: chemical composition, crystal structures, grains size, thermomechanical treatments, training types among others factors [7,8,9].
Then, the metallographic samples were prepared by sanding using the sandpapers sequence of numbers: 220, 400 and 600.
Apparently, the sample subjected to treatment TTAR has increased grain size.

Nowadays millions of transistors are being packed into very small spaces and the more elements there are, the greater the number of functions that will be in use at the same time.
Because the oxidized diamond abrasive easily breaks into smaller grains to achieve self-sharpening action, and smaller diamond grains, better results were obtained.

Zhang show that introducing pores with sizes similar to grains for partial removal of grain boundaries, resulted in MFIS values of 8.7% in Ni-Mn-Ga polycrystalline foams [8].Up to now, although Ni–Mn–Ga alloy has been extensively studied, but there are some problems for practical application.
The MFIS numbers of FSMAs are -80ppm and -402ppm, respectively.

By comparison, it is found that grains at crest and trough of bellows grow obviously.
It is found that there exist precipitates at the grain boundary, and precipitates at trough of large-size bellows are much more and larger than precipitates at crest.
Acknowledgement This work was supported by the Program for Changjiang Scholars and Innovative Research Team in University (IRT1229) and the National Natural Science Foundation of China under grant number 51275129.