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However, good weldability is the main factor in ensuring the safety of welded structures.
Some studies have shown that the microhardness mapping in several materials was efficient to obtain the mechanical properties.
Zhu et al. (2007) [8] using a nano-hardness mapping obtained the mechanical properties of the phases present in stone and cement.
The obtained images showed with more clarity the regions with smaller mechanical properties.
The objective of this study was to obtain information on the mechanical properties of a welded joint of aluminum 5052, using a Víckers microhardness mapping technique.

LS is an effective additive to improve mechanical and dielectric properties of PET.
Mechanical properties of the PET/LS copolymers Fig.2.
Effect of LS content on mechanical properties of PET Effect of content of LS on mechanical properties of PET was shown in Fig.2.
Conclusions A novel kind of PET/LS copolymers was prepared and investigated the mechanical properties and dielectric properties.
And LS is an effective additive to improve mechanical and dielectric properties of PET.

To obtain desirable mechanical properties, therefore, several processing routes for preparing Zr(Y,Ce)O2 TZP material in the Y2O3-CeO2-ZrO2 system have been reported in the literature [3].
The effects of 12 mol.% CeO2-ZrO2 addition on densification, microstructure and mechanical properties of 3 mol.% Y2O3-ZrO2 were discussed.
Therefore, the dependence of grain size on mechanical properties becomes to be different in accordance with which of them acting predominately.
This means that the strength is sensitive on not only grain size but other factors such as composition, density and inner defect.
The sintered grain sizes and mechanical properties were governed by the batch composition of two component materials.

As a result of the research work, the factors affecting the preliminary thermal strengthening and additional strengthening of 65G steel samples using FTMP were identified, which allowed to increase the microhardness of the steel in the processing zone by more than 2 times.
It is emphasized that in this case there is a change in the mechanical properties along the cross-section [6], which is explained by high-temperature heating up to the melting temperature and subsequent cooling at a certain speed.
In addition, a change in mechanical properties can also be caused by the deformation of certain structural components [7].
Therefore, the purpose of the work is to identify the relationships between the influencing factors of FTMP and structural changes of the surface of steel samples.
Natarajan, Effect of process parameters on thermal history and mechanical properties of friction stir welds, Materials & Design. 30(7) (2009) 2726–2731

Petersburg, Russia, 199106 amaks.78.54@mail.ru; befim-aleks-evgen@mail.ru; ckeksin.a@mail.ru Keywords: physical and mechanical properties; microstructure; dynamic parameter; damping properties; self-oscillating process; surface roughnesses.
The use of heterogeneous steels provides means for imposing special physical and mechanical properties necessary to solve both technological and structural problems in machine-building production on a structure [2, 5].
At the beginning, analysis of the damping properties of structural materials was carried out.
At the end of the simulation, not all the modes of the considered bars were analyzed, but only those that significantly affect the damping coefficient and quality factor of the system (Fig. 9).
Matveev, Vibration-Absorbing properties of structural materials, Kiev, 1971

Mechanical Properties of AlCrTiSiN Coatings Developed by Cathodic Arc for Protection Applications Nurot Panich1,a,*, Surasak Surinphong2,b, D.A.
The mechanical properties of the resultant coatings were summarized in Table 1.
This is to extract the intrinsic mechanical properties of the tested samples by calculating the coating properties from the unloading curve [3].
In addition, mechanical properties of the substrate mostly affect the failure mechanism and the critical load thus making it impossible to compare the same coating which has been deposited on different substrates.
Two factors then contribute to the stress ahead of the indenter.

Thermal degradation properties were studied by thermogravimetry (TG).
In starch-based composite systems, one of important factors affecting mechanical properties is the interfacial affinity with the matrix polymer.
The mechanical properties including tensile strength and flexural strength were measured using a CMT-4104 comprehensive test instrument.
But the broad band in the range of 3760–3010 cm-1 does not visibly changed, so it means that only a small part starch reacted with maleic anhydride during the processing. 3.2 Mechanical properties The mechanical properties of pure PLA and the composites with different grafted starch content are shown in Table 1.
The properties of the composites are affected obviously by the grafted starch content.

Furthermore, the mechanical properties of the rubber compounds with and without processing oils were considered.
Tensile properties.
Payne effect indicating filler-filler interaction is one of the most important factors to formulate the properties of the rubber compounds containing particulate fillers.
There are four main factors that affect the levels of storage modulus of the silica-reinforced rubber compounds such as filler-filler interaction, in-rubber structure, polymer network, and hydrodynamic effect [15-16].
Mechanical properties.

In metallurgical engineering, there are different criteria affected on coating on surface of the material such as physical, chemical, mechanical, electrical and economical properties.
The main reason ofcoating is the unique and smooth properties of Ni electroless deposited surface.
If the comparisons are not perfectly consistent, then it provides a mechanism for improving consistency[7-9].This model allows evaluating the effecting factors in the quality of coating.
Metallurgical properties of the coatings are giveninTable1.To select the most appropriate option from the properties of electroless coating AHP technique was used.
Alternatives are different concentrations of alumina and criteria are metallurgical properties.

It is the fundamental understanding of these complex relationships that often involves hundreds of factors, which improves quality without losing productivity and raising cost.
These materials offer stronger components with good machinability owing to their even hardness properties.
Introduction Research on cast solid solution strengthened ferritic spheroidal graphite iron with high silicon content (HSI), originally started in order to enhance machinability and reach the same or higher mechanical properties as ferritic/pearlitic GJS-500-7 [1].
The mechanical properties of more than 200 tensile specimens from industrial foundry melts have been compiled from over 30 years of research.
Fig. 3: Influence of tramp elements on the tensile properties.