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Introduction The nanocrystalline materials, defined as polycrystalline solids having crystallite sizes usually less than 100 nm, can exhibit unique properties due to the large fraction of grain boundaries that they possess.
In particular, the strength, ductility and diffusion kinetics, among other mechanical and chemical properties, may be significantly enhanced for nanocrystalline materials in comparison with materials with conventional grain sizes [1-4].
These properties have made NiAl a suitable material for structural application such as gas turbine engine rotor blades and stator vanes.
Significant efforts have centred on enhancing the mechanical properties of intermetallics through grain refinement [7, 8].
Ihkl is computed as a function of some structural and geometrical parameters: (2) S is the scale factor, Fhkl is the structure factor inclusive of the Debye-Waller factor and site occupancy, mhkl is the multiplicity of the hkl reflection, Lp is the usual Lorentz-polarization factor, and Vc is the volume cell.

Those materials with ultra-fine microstructures often exhibit unique mechanical properties, such as extremely high strength together with fairly good ductility [4].
While most studies made so far focus on microstructure and mechanical properties, our aim is to characterize the defects responsible for the interesting behaviour and to examine the thermal stability of the defects and the microstructure, which have not yet been clearly understood.
They are not significantly affected by heating up to 200°C; the general features in the subsequent cooling-run are similar to those in the heating run, except for some decrease in intensity.
Kimura, Mechanical properties of ultra fine grained steels, J.
Schulz, Properties and interactions of atomic defects in metals and alloys - bcc metals, in: H.

The clamping jaw design methodology developed summarizes complex factors.
These factors affect the clamping jaws design for the workpiece.
Input factors the process affect method of clamping and also the quality of the machined product.
This stage involves an analysis of the workpiece in the fixture and examines the factors affecting the accuracy of the workpiece in it.
The mechanical properties of the material are elastic modulus E=2,105 MPa, Poisson's ratio ν = 0,3, yield strength Re = 210MPa, the tangential modulus ET=2,104 MPa.

Magnesium and its alloys have excellent mechanical properties and biocompatibility.
The main factors that affect the axial shortening rate are the structural form of the bridge reinforcement and the connection position of the bridge reinforcement.
The main factor that affects the bending stiffness is the connection form of bridge reinforcement and support ring.
Then combined with polycaprolactone complex filament, PPDO/PCL braided self-enhanced degradable vascular stent with controllable control of both supporting and degradation properties was constructed, and the physical and mechanical properties, degradation properties and biological safety of the new stent were explored through in vitro and in vivo experiment [16].
Microstructure, mechanical properties, in vitro degradation behavior and hemocompatibility of novel Zn–Mg–Sr alloys as biodegradable metals.

The mechanical property of SAC leadless solder included time independent plastic and time dependent creep behaviors.
This will create large stresses and strains that induce cracking or delamination between interfaces, which affect mechanical reliability.
The other material properties used in the simulation are tabulated in Tab 2.
Experiment #1 is to be conducted at Level 1 for each of the seven control factors.
Factors and levelsa and summary of factor TABLE 4.

These parameters can include factors such as sheet thickness, friction coefficient, and the radii of the dies.
Liwen Tian [6] investigated the important factors which that influence the sheet thickness of high-strength steel plate.
Tables 1 and 2 illustrate the mechanical properties and anisotropy of the described material coefficients, respectively.
Mechanical properties of St 14 steel material.
Mechanical Properties Elastic Modulus (GPa) Poisson’s Ratio Yield strength (MPa) Value 210 0.3 150 Table 2.

Introduction The earthquake of high library dam area has strong destructive effect, not only can directly cause damage and casualties, but also lead to secondary disasters caused by the dam collapse, which makes people's life and property in the downstream suffer catastrophic losses, therefore the double disaster the particularity has caused wide attention of the domestic and foreign experts and scholars[1].The role of the quake on the structure is very complex, which not only affected by the quake vibration of the earth surface properties and surface permanent deformation, but also the structures of their own dynamic characteristics, complicated dynamic interaction, and many other factors[2].
According to authority statistics reservoir, the earthquake had occurred in and near dam, and the focal depth is shallow, usually less than 5 km, but the intensity is usually on the high side[3][4].The hydraulic structures specified in the seismic code: the high dam structure, 100m tall and the capacity is greater than 5108 m3, should forecast the reservoir of the possibility of the earthquake, the possible seismogenic area and the highest magnitude[5], but the response calculation process for high library of this kind of complex structure of dam seismic must strive to truly reflect the vibration characteristics, structure, basic mechanical properties of dynamic, the interaction of the structure, foundation and reservoir water.
Besides,which include the complex factors of material surface and dynamic characteristics.
Calculation example The some double-curvature arch dam has a complex high rock mass causes, and the physical and mechanical parameters have significant uncertainty, therefore the role of the dam water pressure, earthquake and load has uncertainty factors, which comprehensively decided the variables of the uncertainty.
The dam is concrete materials, and the elastic modulus is random variables, namely supposed MPa, Poisson's ratio value for, and density is, bedrock the modulus of elasticity is MPa, Poisson's ratio value is; The hyperbolic dam high is 280m, and devide into 4180 unit, and the dam body unit is653, total node account is 5574,Dynamic pressure calculation under the action of earthquake effects of high arch dam hyperbolic vibration frequency characteristics is calculate by using the theoretical analysis results.Based on this theory results hyperbolic arch dam structure vibration frequency of statistical properties is calculated, 10 orders natural frequency of vibration of statistical characteristics is obtained by calculated.

The recent development in FEA of FSW process is described with particular reference to three major factors that influence the performance of FSW joints: modeling technique, tool design and process parameters.
Consequently, the properties of FSW have been the subject of a considerable amount of experimental and numerical studies.
The effect of the different tool configurations and sizes, and welding parameters on mechanical properties of the joints was analysed in detail.
The effect of process parameters on temperature distribution and mechanical properties of aluminium alloy AA2014 FSW joined was investigated by Rajamanickam et al. [37].
However, accurate and reliable FEA is still a difficult task as the mechanical behaviour of these joints is not only influenced by the geometric characteristics of the joints but also by different factors and their combinations.

These cracks can occur due to a variety of factors, but one of the governing properties involved is tensile strength.
Structure Characteristics and Mechanical Properties of Fiber Reinforced Concrete.
Mechanical properties of high-strength fiber reinforced concrete.
Mechanical properties of high-strength steel fiber-reinforced concrete.
Mechanical properties of natural fibre polymer composites.

Effect of filler loading on physical, mechanical and thermal properties.
%;(c) 20 wt.% ;(d) 30 wt.% ( scale bar = 10 µm) The formation of pores in glass ceramic could be influenced by many factors such as volume of the glass powder, filler [7,8] and others.
Azuraien, Physical and Mechanical Properties of Glass Composite Material Made from Incinerated Scheduled Waste Slag and SLS Waste Glass, Adv.
Wang, The effects of particle size and content on the thermal conductivity and mechanical properties of Al2O3/high density polyethylene (HDPE) composites, eXPRESS Polym.
Thiansem, Effects of charcoal on physical and mechanical properties of fired test briquettes.