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The material qualities of a cryogenically treated material are significantly improved since it reduces internal residual stresses and dislocations, encourages grain refinement, and enhances wear resistance, hardness and dimensional stability, by cooling them at cryogenic temperatures [8].
A number of brass electrodes are cryogenically cooled before the tests, after which they are used for machining and more research.
With optimal parameter combinations, the SEM pictures of the workpiece's hole entrance region and the accompanying brass electrode tip were taken for run number 8 in order to perform micro-analysis.

Table 3 Sour service drill pipe properties Description Material grade Yield strength （min/max, ksi） Grain size Max hardness（HRC） SSC Threshold （％SMYS） 1st generation TSS-95TM 95/110 5 or finer 26 85 XD-105TM 105/120 5 or finer 30 70 CY-105 105/120 N/A 30 N/A 2nd generation SS-75 75/95 6 or finer 22 85 SS-95 95/110 6 or finer 25 85 SS-105 105/120 6 or finer 27 85 3rd generation SU-75 75/90 8 or finer 20 95 SU-95 95/110 8 or finer 24 95 Shanghai Baosteel, Bohai NKK, Jiangsu Grant, Shanghai Hailong and a number of steelworks in China have the ability to produce anti-sulfur drill pipe.
According to the statistics from CNPC Tubular Goods Research Institute, the numbers of evaluation of materials resistance to sulfur increased significantly from 2007 years to 2009 years, see Fig.6.

In terms of the annealing process, increasing the annealing temperature to 500°C reduced the average diameter of the composite nanostructures.The decreasing trend of the average diameter can be related to the varying ionic radii of Zn (~0.74 Å) and Sn (~0.69 Å), in which the Sn atoms possess a higher number of outer electrons compared to Zn [21].
This process might result in a decrease in overall number of smaller nanoparticles as well as a decreases in the average diameter.
However, the grain size decreased as the annealing temperature rose to 500°C, which could be attributed to the cleavage of the Zn–O bond[28,29].

Conventional geometric patterns mainly contained fret, string pattern, stripe, grain design, cattail design, rope figure, brocade design, whorl and so on.
The lotus petals stretch on all sides and the number of petals is even.
The National Department of Education Planning Fundation Project: Dongyang Traditional Wooden Structure Building Components’ Decorative Art System and Description Mechanism Research Project Number: 14YJA760030 References: [1] Liang Sicheng.

After Yaan section, the geological condition along Sichuan-Tibet railway is complicated and the number of tunnels is numerous, with deep burial and long length.
Along Sichuan-Tibet railway, there is rare contact metamorphism with carbonatite, but some carbonatite interlayers, such as Jinsha River metamorphic belt, and sericite quartz schist and thin-layer fine-grain limestone spread from Batang to Zhulong; limestone with aeshnidae spreads in Zhongzan and Xuepo; bearing diabase , glutenite, slate and limestone spread in Bengzha and Jini of Batang; marble and low metamorphism degree limestone spread in Beidongluolong and Basu on Nujiang River suture zone.
Acknowledgements This paper was jointly sponsored by “comprehensive research on regional railway engineering design for oil and gas deposits district of Sichuan Basin along Lan-Yu railway influenced by shallow layer natural gas (guide subject of Ministry of Railway)” and SWPU Scientific and Technological research fund program of “natural gas migration research during stress variation process of surrounding rock in tunnel construction (number：2007XJZ052)”。

Experiment shows that a large number of cracks appear on the surface of specimens mainly between the 2h~4h and cracks are in a relatively stable status after that; compared with base mortar, the mortar mixed with polypropylene fiber and SJ material could significantly delay the occurrence of the first crack in the matrix.
It can be clearly seen from the photographs that crystals in P1 don’t grow continuously and gaps between grains are large; a large number of new crystals come out in PS1 with a significant increase of density.

Therefore, the incorporation of SDE to the clay produced an increase in the interconnected surface porosity possibly due to a growth of pores, both in size and in number, due to the organic waste content to increase the interconnected porosity surface.
It can be observed the number and type of pores are modified as the waste was added to the bricks.
Meyer-Pittroff, Application of spent grains to increase porosity in bricks, Constr.

Since RAP may be obtained from any number of old pavement sources, quality can vary.
The number of times the pavement has been resurfaced, the amount of patching and/or crack sealing, and the possible presence of prior seal coat applications will all have an influence on RAP composition.
This may also be due to the reaction between the hydrated lime with tricalcium aluminate and water to form tetracalcium aluminate hydrate which form protective coating on the surface of unhydrated grains of tricalcium aluminate, Mix proportions Figure 10 Variation of california bearing ratios (CBR) with various proportions of Laterite + RAP + Cement mixes thus slowing down the rate of hydration of tricalcium aluminate to form the, strength producing compound of tetracalcium aluminate hydrate [23].

Furthermore, in order to judge the length of the crack along the direction of the column rift grain, the entry section is raised to a height of 30cm from the column base, and the resistance curve is as shown in Fig. 15b, it can be seen that the crack still exists but has been significantly reduced.
During field testing, attention should be paid to those components that are wrapped by the wall, the corner components that are exposed to sun and rain, the components subject to concentrated forces, the deformed components, etc., and testing operation plans shall be flexibly and reasonably developed according to different positions and shapes of the components and the damage prediction obtained in the preliminary screening, including selection of testing section, determination of number and direction of micro-drill resistance entry, arrangement of number of stress wave sensors, etc.

In particular, as biological polymers, the use of grain starches, waste from leather and paper industries, etc. is widespread.
In [16] it is stated that wood-polymer composites (WPC) are now well known in the field of industrial applications due to a number of advantages that they can provide compared to mineral filler-polymer composites.
Samples of wood-polymer composites were placed on the ground in a box with the markings (sample numbers) facing up so that the distance from the box walls and partition to the samples was (40±2) mm, and the distance between the samples was (30±2) mm.