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Legerská Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, Paulínska 16, 917 24 Trnava, Slovakia chaus@mtf.stuba.sk, alexander.chaus@stuba.sk Keywords: High-speed steel, Structure, Phase Composition, Properties.
In the present work special features of the structure, phase composition and properties of such high-speed steels designed for cast tool are studied.
Specimens for mechanical tests, metallographic examination, and XRD analysis were prepared from the above-mentioned ingots.
Such cast fine-grained structure of a ferritic matrix is due to several factors.
All these benefit in improved mechanical properties, first of all in impact toughness of as-cast high-speed steels.

There are attractive for their special properties in various technological applications.
Hence to learn more about their mechanical properties is very desirable.
Schmid factors for the {} twins – full line (identical with the Schmid factors for the c+a slip) compared with the Schmid factors for the a slip – dashed line.
Loureiro, Properties and applications of titanium alloys: A brief review, Rev.
Paidar, Non-planar dislocation cores: A ubiquitous phenomenon affecting mechanical properties of crystalline materials, in Vol. 14 of Dislocations in Solids, Editor J.P.

As the "thermal expansion" characteristics of the object, when the ambient temperature changes, the mechanical structure is formed "expansion contraction effect", may affect the accuracy and performance of the frame. 
Table 1 Material Properties Table Property Densityg / cm 3 Elastic modulus G p a Poisson's ratio Thermal expansion coefficient · 10-6 1 / ℃ Heat transfer coefficientW / mm 2℃ Value 7.85 210 0.31 11.59 0.04815 Meshing is a discrete realization of the model, which aims to solve the domain decomposition into the appropriate number of exact solutions available units. 
Mechanical Design ,2008,04:1 -5
Mechanical Engineering ,2008,06:177-182
Mechanical design and manufacturing ,2012,10:231-233

The experimental results showed that the impurity and flaw of weld area were the main factors for the failure of ERW seam weld in high internal pressure.
The mechanical properties of tensile strength and impact absorbing energy were analyzed by UH-F500KNI and JBN-500, respectively.
The mechanical properties of tensile strength and impact absorbing energy are shown in Fig.4 and Fig.5.
The above experimental results indicate that the mechanical properties were clearly influenced by the microstructure.
The flaw and impurity of welds lead to a mechanical properties decrease at different temperatures.

Table 1 Chemical composition of EN-31 in wt% C Mn Si P S Cr Fe 1.200 0.596 0.255 0.045 0.05 1.18 Bal Table 2 Mechanical properties of EN-31 Tensilestrength 851N/ mm2 Yieldstrength 567.33N/ mm2 Hardness 24HRC BMC TC45 20 CNC milling machine (Fig. 1) with constant flow recycling coolant was utilized for performing the operation.
The values of the 4 factors and 3 levels of design that were taken into consideration are shown in Table 3.
The hierarchy of the factors affecting the processes is shown by the delta value.
Effect of Various Heat Treatment On The Mechanical Properties of Steel Alloy EN31.IJIRST –International Journal for Innovative Research in Science & Technology| “Volume 3 | Issue 12 | May 2017
Kaynakli, on Multi-objective optimization of parameters affecting Organic Rankine Cycle performance characteristics with Taguchi-Grey Relational Analysis.

In order to prolong the fatigue life of the machine tools, this study investigates the effects of the lubricants on the tribology properties under the extreme pressure for the induction-treated linear guides.
The mechanisms of the lubricants on the tribology properties for the mechanical equipment in the continuous operations [1]: the lubrication functions of the frictional contact points are mainly provided by the base oil and lubricating additives in the grease.
Masuko et al. [7] used a micro-friction testing machine to investigate the wear characteristics under boundary lubrication conditions, and found that the friction coefficient under lubrication conditions was affected by a number of experimental factors.
Therefore, this experiment used the variations of friction coefficient and the analysis of wear depth and worn surface to investigate the effects of the lubricants on the tribology properties of the induction-treated linear guides.
Wear volume of the cylinder specimens: (a) HN, (b) the grease (G01) Conclusions Effects of the lubricants on the tribology properties under the extreme pressure for the induction-treated linear guides are investigated in this paper.

One must remember that high temperatures largely influence the mechanical properties of concrete so it is clear that this creates evolution of the fracture energy up to a temperature of 300°C.
These changes severely degrade their mechanical properties, and compromise the resistance to heat transfer and resistance to fire penetration [10].
As can be predicted from the rapid degradation of the mechanical properties, the crack width is markedly increased with the rising temperature.
Concrete Structure, Properties and Materials, Prentice-Hall Inc, New Jersey, 2nd Ed, pp 390, (1993)
Shah, Factors affecting the cementitious materials at high temperatures and medium [0] heating rates, Materials and Structures issue 39:4 (RILEM 288), pp.455-469, (May 2006).

It is also sensitive to fretting wear, greatly affect the safety of titanium.
Cubic boron nitride(CBN) is of outstanding mechanical and physical properties,including high hardness and thermal conductivity.moreover,the thermal stability,chemical stability and resistance to oxidation of the CBN are better than diamond[2].These unique properties make CBN as an ideal cutting-tool candidate in processing of the hard-to-machine materials,such as alloy steel,quenched steel and cast iron[3].
The surface hardness of the part is one of the important factors influencing the abrasion resistance.In order to obtain wear resistant coatings with good properties,a process of laser cladding coating on TC11 substrate with CBN Powder was studied,The microhardness of the laser cladding coating was measured using HVS-1000 type micro-sclerometer.Through the comparison analyses of the microhardness for the laser clad coating,studied the effect of different process parameters on the hardness of CBN coating.
Comparison of properties between CBN and diamond Properties CBN Diamond Crystal Structure Zinc-blende Diamond Lattice Constant (nm) 3.615 3.567 Density(g/cm³) 3.48 3.515 Micro-Hardness (HV) 4700 7000 Elastic Module (Gpa/cm²) 69.6 97 Melting Point (K) 3500(10.5Mpa) 4000(13Mpa) Thermal Conductivity (W/m.k) at 300K 1300 (Theoretical) 2000 Thermal Stability (K) <1673 <973 Thermal Expansion Coefficient (10E-6/℃) 4.7(800K) 3.1 Table 2.
[4] X.W.Zhang, J.B.You and N.F.Chen, Recent Advances in Synthesis and Properties of Cubic Boron Nitride Films.

Corrosion behavior, mechanical properties, creep resistance, hardening/baking behavior, additive manufacturing suitability are among the studied themes.
All these properties are strictly linked to the microstructure of the material.
Moreover, the alloy exhibited better mechanical properties at short time creep, and worse mechanical properties at long time creep than the same alloy with higher Ag content [3].
Several factors are known to influence creep behavior of aluminum alloys: grain size, texture, coarse and fine precipitates, heat treatment.
The first considered factors are grain size and shape factor.

The degree and the depth of work hardening were significantly affected by the axial depth of cut and feed per tooth.
Especially, to ensure the size of the composite structural components after forming, Invar36 has been used as a material for forming mould in the field of aerospace for it can match the thermal expansion properties of composite material[2-3].
Experimental Procedure Chemical composition and mechanical properties of Invar 36 were shown in Table 1 and Table 2.
Table 1 Chemical composition of Invar36 C P S Si Mn Ni Fe £0.05% £0.02% £0.02% £0.3% £0.6% £35.0%~37.0% Rest Table 2 Mechanical properties of Invar36 Mechanical properties Value Tensile strength (MPa) 590 Yield strength (MPa) 410 Elongation rate (%) 30~45 Hardness (HV) 125~140 Elastic modulus (GPa) 141 All the milling experiments were carried out on a 5-axis milling machine center (MIKRON UCP 710) as shown in Fig. 1(a).
In this work, cutting speed, feed per tooth and axial depth of cutting parameters were set as control factors with three levels respectively and work hardening was set as response factor.