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External influences that change the properties of ‘smart’ materials can be mechanical loads, electric or magnetic fields, temperature, light, humidity, chemical properties of the environment, and others [3].
First, the surface microhardness changes, which is associated with some mechanical properties of the intermetallic compound [15, 16].
Second, special properties such as shape memory and pseudoelasticity can be affected.
These changes irreversibly affect the functional properties of NiTi, which are the main criteria for choosing SMA in the previously mentioned industries.
Vimieiro, Characterization of mechanical properties of an alloy with shape memory – nitinol, COBEM 2015 23rd ABCM Int.

This is due to some superior properties of these materials such as high strength-to-weight ratio, excellent low temperature performance, exceptional corrosion resistance, high machinability index and comparatively low cost [1, 2].
Various properties of MMCs, such as strength-to-weight ratio, thermal stability, wear and corrosion resistance, are superior to those of their constituents [3].
A lot of factors affect the surface condition of machined part.
Although many factors affect the surface roughness of machined part such as feed rate, tool geometry, and productivity of machine tool.
The difference between theory and actual surface roughness may be caused by the factors such as workpiece material, built-up edge formation, chip formation, tool wear, tool vibration, workpiece vibration.

This article analyzes the influencing factors of the fresh red meat, such as the proportion of mixed gas, gas barrier materials, meat splitting ways and the meat storage temperature.
The Factors Affecting Modified Atmosphere Packaging The Proportion of Mixed Gas.
The Barrier property of packaging materials also has a close relationship with temperature; the higher the temperature is, the lower the barrier packaging materials would be [10].
But the sales process need to be considered in addition to the colony suppression meat, meat color, etc. and to take care of the factors that attract consumers, so it can save the high O2 manner to ensure that bright flesh [15].
Because the gas composition varies with different meat, the accuracy of gas ratio greatly affects freshness preservation effect of meat [16].

Introduction Different trademarks of tungsten carbide have different chemical components, crystal grain size and mechanical performance and are adoptable to different engineering fields.
Among all factors influencing the performances of tungsten carbide, grain size may become more attentive one [1, 2].
The chemical compositions and properties of substrates are shown in Table 1.
Table 1 Chemical compositions and properties of the substrates WC-Co Average size Nominal composition Density Hardness Transverse rupture grade of WC powder[µm] [wt.％] [g·cm-3] [HRA] strength[MPa] 1(K01) 0.5 94％WC-6％Co 14.85 93.0 2700 2(K10) 1.5 94％WC-6％Co 14.95 91.5 2500 3(K20) 3.0 94％WC-6％Co 14.95 91.0 2600 Tribological Tests.
The adhesion and the surface roughness of diamond thin film are the two key factors for diamond coated cutting tools, therefore, it is very important to obtain high quality diamond films with high adhesive strength and low surface roughness for the diamond coated cutting tools by regulating deposition parameters according to the grain size of substrate.

Introduction Corrosion is the major factor causing pipe cracking under long-term operation.
Pipe corrosion and pipe leakage are the major failures mode, but hydrogen induced cracking (HIC) and sulfide-stress cracking (SSC) are the most serious factors of pipe corrosion [1,2].
When the plastic elbow being deformed its temperature T＞TR （re-crystallized temperature）which means Inconel 600, with properties of re-crystallization TR =470˚C，its elbow has gone through transient temperature over 470℃。
Analysis and Conclusion Based on the sampling analysis of the 2” wastage alkali system，including chemical analysis, mechanical properties, thickness and speed relations, corrode products inspection, the bended portions seriously reduce the thickness and causing cracking.
Temperature will also affect the corrosion rate caused by active S2- [3], so the operation temperature shall be lower than 205˚C.

Introduction Sulfate attack is one of the most aggressive environments that affect the durability of concrete structures.
In spite of some valuable researches conducted to investigate the mechanical properties of mineral admixtures contained concrete, sulfate resistance under wet-dry cycle condition of these concretes are rarely found in the literature.
In addition, the wet-dry cycle environment may affect the pozzolanic activity of mineral admixture.
However, at later stage, the value appeared stronger randomness as a result of the effects of corrosion environment and properties of materials.
And the crystallization of sulfate is main factor resulting in deterioration.

Because of the high variation of the physical and mechanical properties the part has to have a high reserve factor and thus weighs more [3].
Mechanical properties.
This is considered optimum for achieving maximum mechanical properties.
Mechanical properties.
The MTI laminate had good mechanical properties but poor void and defect results.

If the crack grows along the weld or in the heat-affected zone, then it is recommended to take γdc = 0,75–0,80 [16, 19].
КС = [1 + с(ТЭ – 20°С)]КСТ(t0/t)0,2, (5) where c is a coefficient depending on the properties of the steel; ТЭ is the temperature of structure operation; КСТ is the critical value of the stress intensity factor found when testing a steel sample at a temperature of + 20 ° C; t0 = 20 mm is the thickness of the tested steel specimen; t is the thickness of the structural element with a crack, mm.
Shvetsova, Physico-mechanical modeling of fracture processes, St.
Kychkin, The calculation of the residual life of metal lifting machines, taking into account the risk of the appointment of performance indicators, Bulletin of mechanical engineering. 7 (2013) 116
[18] Handbook of stress intensity factors, In 2 t., T. 2. ed.

Ceramic that has lower solubility, low melting point and easy forming begins to use in the 1960s and 1970s, and people paid attention in it for a long time, but it just use for coating at present because of low mechanical properties [13].
Laser Rapid Prototyping 1 High density, high strength, high efficient and high precision 2 Time-saving, low cost and direct forming Expensive, difficult operation and high maintenance cost. 5 Surface Modification As everyone knows, materials, design and manufacturing technology are not the only factors affecting the success rate of the dental implant operation, the surface properties of materials also have huge effect on the long-term performance for dental implant.
A vast experimental researches have demonstrated that sandblast, acid etching, electrochemical treatment and thermal spraying can improve Mechanical properties and biocompatibility[42-44].
A number of factors will make an effect on biocompatibility, such as host genetic factors, implant position and the implant environment, structure, shape, size, surface roughness of materials[46-49].
The effect of heart cerebrovascular disease psychological factors on the oral cavity repair for old people[J].

The material microstructure affects strongly these cracks' growth rates.
The local property parameters, φ and m, control small-crack growth rate.
The small crack growth behavior is influenced strongly by the material microstructure and physical properties.
It should be a material constant, depending on the microstructure and physical properties of a material for a given loading.
Effective Stress Intensity Factor Range ∆∆∆∆Keff.