Search results

The purpose of this conference was to bring together researchers in the fields of experimental, simulation, and theoretical aspects of grain growth in order to share the currently available experimental data and to compare these data with recent theoretical results.
From these papers of Cyril Smith we learned of the importance of grain boundary area reduction and the relationship of area reduction to motion by curvature; the importance of dihedral angles; the remarkable result in two dimensions with 120 degree trijunction angles, that the rate of growth or shrinking of a grain depends only on the number of its corners and not on its size or shape, and the importance of particles in slowing or stopping grain growth.

Therefore, understanding of the volumetric response is important in numerous engineering processes (e.g. high pressure injection molding) [1] and applications (e.g. noise and vibration reduction applications) [2].
Obtained data is further sent to a personal computer.
Obtained data reflects general functionality of apparatus although apparatus has certain limitation regarding boundary conditions.
Emri, Railroad noise and vibration reduction system, SEMDOK 2012: 17th international of PhD students’ seminar, 2012 [3] T.

Lee et al [4] proposed modification method of the shoes and the drum for squeal reduction.
A data acquisition system (DEWE-201) is used to capture all related data.
This indicates that with a proper modification made on the lining a promising squeal reduction can be sought.

Driving cable force of generator adopts 700N measurement data of the experiment.
So, the reduction of the drive tension caused by friction slows down the deploying speed of the ring truss antenna, then causes asynchronous phenomenon in the deploying process.
The results of analysis shows that the friction causes the reduction of the cable tension and then causes the asynchronous phenomenon in deploying process, then slows down the deploying speed of the ring truss antenna.
This can provide necessary reference data for the design and manufacture of deployable truss structural.

Evolution of Various States of Water in Blended Cementitious Materials SHE An Ming1, a, YAO Wu2, b and YUAN Wan Cheng1, c 1 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China 2 Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 200092, China a sheanming@gmail.com, b yaowuk@tongji.edu.cn, cyuan@tongji.edu.cn Key word: cement; fly ash; water; low field NMR Abstract.
After conducting a numerical Laplace transformation by the computational programme, a plot of T2 distribution originating from the data of Fig. 1 (a) is obtained as shown in Fig. 1 (b).
Fig.1 (a) The typical decay of transverse relaxation detected by CPMG pulse sequence, (b) the T2 distribution arising from the data of (a) Table 2 Relationship between pore dimensional and relaxation time Pore types Capillary pore Mesopore Gel pore Pore diameter/nm >50 50~12 <12 T2/ms >1.042 1.042~0.208 <0.25 To detect the content of chemically bound water, the specimens cured for desired time were dry in a oven with setting temperature of 105℃ to constant weight.
That might ascribe to the reduction of absolute amount of cement in the composite pastes.

Table 3 Granularmetric composition of treated samples at different curing time [%] Soil Curing time [day] Dispersant agent ＞2 mm 2- 0.5 mm 0.5- 0.25 mm 0.25- 0.1 mm 0.1- 0.075 mm 0.075- 0.005 mm ＜0.005 mm Treated 1 N 5.38 4.26 9.95 5.52 74.89 0 Y 6.29 5.13 10.8 4.20 61.71 11.87 8 N 7.68 4.38 8.77 4.97 77.0 0 Y 10.54 3.94 8.47 4.26 63.22 10.57 28 N 1.38 10.87 4.77 8.87 3.80 70.31 0 Y 0.21 6.62 5.08 11.38 10.47 61.53 4.71 Data in Table 3 show that, compared with original sample, there is an obvious decrease in clay particle content in stabilized samples, and it is even zero in consolidated samples without dispersant agent.
Hence there is an increase in clay particles and a reduction in silt content in soils treated by dispersant agent.
Table 4 Physical and mechanical property of treated samples at different curing time Sample Curing time[day] Water content [%] Cohesion [kPa] Internal friction angle [o] Treated 1 42.0 24 13 8 38.0 50 18 28 43.7 176 29 From data shown in Table 4, it can be found that at the early stage of curing period, the water content of samples decreases gradually and somewhat increases at the final curing days.
When the curing time is one day, water in soil is greatly exhausted after the addition of cement, while penetrating quantity is small, leading to a reduction in water content.

During the data processing, special attention should be paid to the abnormal sliding in upward section of the curve to get the upper yield point value, the lower yield value and the maximum value.
The elongation, the area reduction rate, the yield stress and the tensile strength could be calculated after measuring the length and width of the minimum section of tensile failure samples.
The measured data is listed as below: Table 2 Performance index after experiment Numbers Properties Original sample No.1 of air cooling No.2 of air cooling No.1 of austenite region treated No.2 of austenite region treated No.1 of ferrite region treated No.2 of ferrite region treated Upper yield strength（MPa） 297 289 286 284 282 287 289 Lower Yield strength（MPa） 303 282 278 281 279 280 283 Tensile strength（MPa） 394 377 382 376 375 377 381 Elongation（A％） 23.5 29 31.5 33.5 34.5 32 29.6 Reduction of area（Z％） 51 56 60.5 64 65 59.5 58.5 Conclusions 1.

Rossignolo (2009) [5] found a significant performance improvements in these structures from the reduction of total weight by using lightweight aggregates, such as expanded clay.
Looking at the data obtained it was concluded that both in light and in the conventional concretes, the interactions between paste and aggregates become stronger with increased consumption of cement.
From the test of modulus of elasticity, it could be seen that the lightweight concrete produced in this study showed a reduction, an average of 16% when compared to values achieved by conventional concretes.
These results show that the aggregate is the main limiting factor of the performance of mechanical strength of the concrete, ie, the weakest part of the lightweight concrete is the aggregate and the mortar is stronger, thus confirming the data obtained by Rossignolo (2009) [5].

The tensile properties were obtained by analyzing the load elongation data.
The estimated conventional mechanical properties like Brinell hardness (BHN), yield strength (YS), ultimate tensile strength (UTS), %elongation (EL) and %reduction in area (RA), impact energies (IE) at room temperature (RT) and at sub-zero temperature (50°C) were examined as bar charts; a typical variation of YS with heat number is shown in Fig. 1(a).
YS: 1330±29.4 MPa, UTS: 1434±24.4 MPa, %elongation: 12.51±0.83, %reduction of area: 47.18±3.39, Impact energy (RT): 45.89±5.56 J and Impact energy (-50°C): 36.05±4.16 J.
The generated data of KQ could be excellently described (Fig. 4) by normal distribution (CC=0.997) rather than by Weibull distribution (CC=0.978) for 99% confidence level.

Approximately 10% reduction was given in each pass and total thickness reduction given was ~160%.
In order to get an evidence of recrystallization, the grain average misorientation (GAM) was calculated for the rolled sample from the EBSD data (see Fig. 2c).
Mordike: Magnesium Technology: Metallurgy, Design Data, Applications, 2006: Springer- Verlag Berlin Heidelberg, p 270