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Effect of Experimental Factors on Hardness Measurement Using the UCI Technique Peter Burik1, a and Ladislav Pešek2, b 1Technical University of Liberec, Faculty of Mechanical Engineering, Department of Material Science, Studentská 2, 461 17 Liberec, Czech Republic 2Technical University of Košice, Faculty of Metallurgy, Department of Materials Science, Letná 9, 042 00 Košice, Slovak Republic apeter.burik@tul.cz, bladislav.pesek@tuke.sk Keywords: UCI technique, DP steel, IF steel, structural steel Abstract.
The work experimentally analyses the effect of various factors on measured hardness values on thin steel sheets by Ultrasonic Contact Impedance (UCI) technique.
The UCI hardness may depend on some factors, therefore optimal measurement conditions must be determined.
Thickness t and mechanical properties of the steels are in Table 1.
a) b) Fig. 3 Microstructure of used steels: a) Steel XSG, b) Steel HR 45 Table 1 Mechanical properties, grain size and indent size of used steels Steel Rp0.2 [MPa] Rm [MPa] A80 [%] HV 1 n t [mm] grain size [µm] indent size [µm] XSG 177 286 47.2 120 0.211 1.95 22 112 HR 45 360 Re 449 27 179 0.139 1.80 8 91 Results Distance between indents: Indentations on sheet surface without zinc coating were realized with different spacing between the indents centers (0.2; 0.3; 0.5 and 0.7 mm).

Effect of Deformation Route on the Mechanical Properties of CP-Ti Deformed by Equal Channel Angular Pressing (ECAP) S.H.
Korea a jkpark@webmail.kaist.ac.kr Keywords: Equal-channel angular pressing (ECAP), Deformation route, Texture, Mechanical Properties, CP-titanium Abstract.
The variation of deformation route in ECAP can alter the deformation patterns of the materials during shearing and thus can significantly affect the mechanical properties of the materials.
Table compares important mechanical properties.
Route Texture Schmid factor A ]0112)[31030( 0; 0.43; 0.43 Bc ]0112)[10413( 0; 0.36; 0.36 C ]0112)[9422( 0; 0.29; 0.29 The difference of mechanical properties with deformation route now can be understood in terms of difference in grain structure depending on the deformation route.

properties.
Conclusion The CHA-gel with excellent physicochemical properties can be prepared under the optimal conditions, which can set foundation for developing better mechanical and Enzyme-resistant properties products of CHA-gel.
Orthogonal experiment The selected factors affecting orthogonal experiment are concentrations of NaOH, temperatures and the ratios of cross-linking agent to HA (g/g).
Table 1 L9(33) factors and level of the orthogonal experiment.
This research can establish foundation to develop better mechanical and enzyme-resistant degradation properties products of CHA-gel．

The measurement of mechanical properties was performed by universal testing machine.
The studies regarding their mechanical properties of polymer based PCF are still lacking.
The optical and mechanical properties of the air core PCFs are also investigated.
The measurement of mechanical properties was performed by universal testing machine.
Ashby: Cellular Solids: Structure and Properties, Cambridge University Press, 1999.

Influence of the Geometric Characteristics of the Mini-Implants on Mechanicals Properties Using Artificial Bone Similar to Anterior, Middle and Posterior Regions of the Jaws E.I.O.
Several factors affect the pullout strength of mini-implants: bone density, morphological characteristics, insertion methods with or without predrilling [13,14] and variations in the design configuration.
A high thread number and depth combined with a low pitch within the same implant length increase the surface area of the implants positively, affecting pullout strength and stress distribution upon loading [17].
The mechanical properties of the solid rigid polyurethane foam were defined for each jaws area based in literature [4,10-12,17] and are described in Tab. 1.
It was evident the influence of the mechanicals properties of artificial bone, on the other hand no was clean if trabecular bone density had more influence than cortical bone thickness.

The given work considers the influence of the power supply type (diode rectifier DR-306 and upon new generation inverter Nebula-315) upon the chemical composition, microstructure, mechanical properties of the weld joints and health characteristics of the manual arc welding process.
We have carried out a number of experiments to estimate the influence of the power supply type upon the chemical composition, microstructure, mechanical properties of the weld joints and health characteristics of manual arc welding.
The weld joints completed with the use of different power supplies are also supposed to possess different properties.
The mechanical properties are given in table 3.
The mechanical properties of arc weld joints completed on Ø159×6 tube (09Mn2Si steel) with LB 52U electrodes Power supply Rupture strength time limit σB, MPа Outside, inside and edgewise bend angle, ° Impact resistance KCU, J/sm2 (cut along the weld joint centre) +20 °C 0 °C -20 °C -40 °C DR-306 541-543 542 120-120 120 201-220 210 212-223 216 200-233 219 143-230 182 Nebula-315 550-560 556 120-120 120 208-226 217 215-254 235 224-250 237 150-258 193 Work [5] states that the intensity of current is one of the factors determining the weld fumes chemical composition, so the power supply type influences the air health characteristics of the work area.

Influencing factors Earthquake.
The water content is a soil physical indicator, which reflects the state of the soil, and the changes of water content will affect series of mechanical properties of the soil.
The existence and changes of ground water can directly affect gravitational condition of slope and mechanical characteristic of rock soil, which are main factors affecting slope stability.
A hierarchy allows us to focus judgment separately on each of several properties essential for making a sound decision.
The most effective way to concentrate judgment is to take a pair of elements and compare them on a single property without concern for other properties or other elements.

Table 2 Mechanical properties of main aluminum alloy sheets for automotive panel.
There are many factors affecting the spring-back.
Thus the mechanical properties would not change and the alloy had good aging resistance stability.
All these factors jointly caused the apparent improvement of the bake hardening effects.
Relation between surface orange peel, mechanical properties and surface roughness of tensile aluminum alloy sheet[J].

The study examined the fresh properties and mechanical characteristics of the resulting material.
However, the mechanical properties of the hardened concrete were slightly affected to some extent.
The properties of recycled aggregates, such as their water absorption, particle shape, and surface characteristics, may differ from those of natural sand, affecting the workability and mechanical properties of the resulting concrete.
The physical properties of aggregates.
These factors can negatively affect the concrete's overall strength, decreasing compressive strength [14].

Therefore, further investigation of the mechanical properties of nonlatex elastics should be conducted.
To investigate and compare the mechanical properties of 3 commercial brands of nonlatex orthodontic elastics.
Since the dimensional characteristics of the elastics would inevitably affect their mechanical properties, the dimensions were measured before testing the mechanical properties.
However, some variations of the dimensional and the mechanical properties were observed among each brand.
However, an in vitro experiment cannot indicate the exact properties of the elastics since in real clinical situations, the elastics are exposed to numerous intraoral factors as well as influenced by the movement of the jaws(11).