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The remnant liquid forms an amorphous grain boundary phase which degrades the mechanical properties of the material at temperatures > 1000°C because of drastic softening of the grain boundary regions. 1.2 β-Si3N4 Si3N4-based materials display a combination of properties that result in superior resistance to wear, thermal shock and mechanical stress.
This will especially enhance the chemical and mechanical properties at elevated temperatures.
Thus the extent to which the above four factors influence thermal behaviour may vary as the stabilizing cation is changed.
Physical properties like high thermal conductivity, low dielectric constant and loss, high electrical breakdown strength, high compressive strength and low thermal expansion co-efficient are the main factors for the versatile applications of AlN ceramics.
Pronounced prismatic cleavage is, therefore possible in this material, which is supposed to influence the ultimate mechanical properties at high pressure [35].

At the same time, the recycled concrete on the center tube has a "hoop" function, can compensate for the deviation of mechanical properties of recycled aggregate concrete.
The characteristics of steel tube filled with recycled concrete The mechanical properties of recycled concrete compared with ordinary concrete fell and variability increased mostly are used for non-structural system of road.
Hou Rui[4] has studied the constant high temperature steel mechanical properties of recycled concrete columns of the shaft , test design 40 different temperature, different sizes of aggregate replacement ratio, different cross sections specimens, and analysis of the constant high temperature steel recycled concrete axial compressive failure mode, the interaction between the section and working mechanism the stress distribution and the core concrete and the steel tube with ABAQUS, studied the factors influencing coefficient of compressive strength and elastic modulus of the influence factors, and put forward the constant high temperature steel simplified recycled concrete axial compression bearing capacity and modulus of elasticity formula.
Steel tube concrete member having good ductility and the later bearing capacity, good mechanical properties, is a kind of structure form which is more promising.
Steel tube concrete subjected to bending properties of [J].Earthquake engineering and engineering vibration, 2005 (03)

Grind-hardening machining is not only a complex process coupling mechanical, dynamical and thermal effects, but a process containing distinct changes of microstructure and properties of the workpiece grinded surface layer.
In grind-hardening, the special microstructure and mechanical properties of the hardened layer are produced due to the combined effects of a great gradient temperature field and a stress-strain field in the grinding zone.
Besides grinding parameters, other factors influencing the intension and moving speed of the heat source in the grinding wheel-workpiece contact zone can influence the HLD.
These factors include workpiece material, grinding wheel characteristics and surface state, grinding manner, cooling conditions, et al.
Meanwhile, some factors affect and restrict one another and the grind-hardening effects depend on the combined action of all factors [4-7].

The mechanical properties of the dissimilar joints were evaluated by hardness measurements and tensile tests.
Prediction of mechanical properties of the joint can be very complicated in dissimilar joints due to differences in physical properties such as yield and tensile strength, elongation, and hardness.
The high cooling rate of the laser-welding results the formation of a fine microstructure which leads to improved mechanical properties of the weld [8].
However, there are few factors affect sustainability of laser-welding process, such as high energy consumption and costly set-up requirement relative to other welding processes [9,10].
Measured properties of the test materials.

The influencing degree and trend of these parameters was studied by using the rang analysis, and the optimization set of factors was obtained.
Introduction Quality of the injection products is affected by many factors, such as mold design, the performance of the injection molding machine, material properties, process parameters, and the molding process have the most direct influence on the final quality of the products [1].
Table 1 Variable factor levels Levels Controllable factors A [°C] B[°C] C[s] D[MPa] 1 230 40 1.5 60 2 245 50 2 70 3 260 60 2.5 80 Four factors were studied in this research, three levels of each factor were considered.
If the value of Rang is large, it means that the change of the factor will affect the warpage greatly.
The values of Rang is shown in Table 3, and the trends of warpage with each factors studied in this paper are shown in Figure 4.

Efforts have been done to improve the mechanical properties of scaffolds.
The effects of the microwave sintering conditions on the phase composition, microstructure and mechanical properties of the fabricated scaffold were investigated.
It shows that grain size is another important factor affects the strength of scaffold besides densification.
Generally, the strength of scaffolds is mainly determined by two factors, the properties of materials used and the structure style including macro-pores and defects, micro-structures and its distribution.
The mechanism of microwave sintering to improve mechanical properties of sintered bodies is complicated.

With respect to the electrode microstructure, the starting particle size, agglomeration and specific surface area are all important factors affecting the electrochemical performance.
The stated powder properties are closely related to the degree of calcination [6].
Results and Discussion Cathode powder properties.
However, the contribution of the last two factors was obscured by the larger particle sizes of the LSCF-SDCC55 cathodes calcined at a temperature higher than 750 °C, which caused the increment of ASR.
Petrisor, Electrical properties of ceria/carbonate nanocomposites.

The enhanced mechanical properties of crystalline materials are linked to very small grain sizes.
The room temperature mechanical properties of the extruded alloy are investigated through hardness measurements and tensile tests.
Alloy 8090 has 10% lower density and 11% higher modulus than these conventional counterparts, and 8090 exhibits superior mechanical properties at cryogenic temperatures.
Experimental Results and Discussion Properties Characterisation.
With a nanoindenter, mechanical properties can be measured.

The paper is concerned with the performance properties of electrospark deposited coatings.
The surface layer forming on the product improves its operational properties [2-4].
Analysis of properties of coatings obtained from EDM requires many methods.
Szalapko, Measurement of electric impulses and properties of carbides electrospark coatings, in: J.I.
Radek, Determining the Operational Properties of Steel Beaters after Electrospark Deposition, Eksploat.

The joint characteristics of Friction Stir Welded Mg-Zn-Y alloy Chang-Yong Lee1, a, Won-Bae Lee2,b , Yun-Mo Yeon3,c , Seung-Boo Jung 4,d 1,2,4Department of Advanced Materials Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do, 440-746, Korea 3 Suwon Science College, Hwasung, Gyeonggi-do, 445-742, Korea a lcy011@skku.edu, bsaba38@skku.edu, cymyeon@ssc.ac.kr, d sbjung@skku.ac.kr Keywords: Friction Stir Welding, Mg-Zn-Y alloy, Microstructure, Mechanical properties Abstract.
Generally the second phase, such as precipitates, intermetallic compounds by additives, is one of the factors of hardening effect in the Mg alloy.[1] However, the original properties of Mg alloy change ill in the weld joints owing to the coarsening and dissolution of the second phase by the fusion and solidification during the conventional welding process.
We also observed the effects of microstructural issues on the mechanical properties near the weld zone.
The micro Vickers hardness and tensile strength tests were carried out to evaluate the mechanical properties of the joints.
The upper region(c) has coarser grains than that of the lower region(g).[4] In the TMAZ(Thermal and Mechanical Affected Zone)(f) next to the SZ, fine grains and coarse grains coexist.