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It was found that samples quenched from 900°C have the highest mechanical properties.
Mechanical properties of joints obtained by different methods are compared.
In addition, differences in copper infiltration methods affected the mechanical properties of the material.
Copper-alloyed steels also showed [20] an increase in mechanical properties.
While the decomposition in steels with ~2 wt.% Cu affects the mechanical properties of the material – dispersion hardening occurs with a simultaneous decrease in impact toughness.

Mihai Viteazul No.1 Brasov Romania acobuzatu@unitbv.ro, balexandru_orzan_1@yahoo.com Keywords: turning, surface roughness, influence factors.
Increasing the power and pressure on which the components of different machines are requested to function and the installations which needs materials with special properties like: high hardness, low surface finish, high resistance to corrosion, etc.; b.
The actual reality confirms the fact that the machining process is and will remain for a long time the principal method of execution of the pieces with different functional properties.
Conclusions From the theoretical and experimental research from this paper it can be take out the next important conclusions: - Practical the roughness from the turning process and also from the others machining processes, it is influenced by others factors than the geometrical ones: plastic deformation of the material for machining, turning speed, cooling liquid used, etc, such as the values obtained with analytical formulas Eq. 3 and 4 which are indicative for the activity of technological roughness
Buzatu, Contributions at the study for the factors that are effecting the increasing of the precision of the exterior turning and rectified machined pieces (in Romanian), Ph.D. paper, Transylvania University, Brasov, 1981

Mechanical, thermal and chemical properties were examined and analyzed. 1.
The usage of fly ash to improve the rheological properties of the fresh paste is due to the spherical shape of its particles that reduces the frictional forces affecting the flow [10], therefore it has a strong effect on workability as presented above in the flow test results (section 3.2).
QD was integrated in 5 set of samples, from 0% to 40% by weight, which were examined for their mechanical, thermal and chemical properties.
Kriven, J.S.J. van Deventer, Understanding the relationship between geopolymer composition, microstructure and mechanical properties, Colloids Surf.
Shah, Factors affecting the resistance of cementitious materials at high temperatures and medium [0] heating rates, Materials and Structures 39 (2006) 455–469

Properties of AZ31 magnesium alloys subjected to different extrusion processes S.S.
Abstract: The AZ31 magnesium alloys were subjected to indirect and direct extrusion processes, respectively, and the properties of the extruded alloys were compared.
In this study, commercial Mg-3Al-1Zn (AZ31) alloys were subjected to the indirect and direct extrusion processes, respectively, and the properties of the indirect-extruded alloy were compared with those of the direct-extruded alloy.
The factors affecting the twin formation include texture, grain size, and second-phase particles.
Summary The AZ31 magnesium alloys were extruded at an initial billet temperature of 300°C and at an extrusion exit speed of 10 m/min by indirect and direct extrusion processes, respectively, and the microstructure, texture and mechanical properties of the extruded alloys were compared.

In order to analysis and study the factors influencing of measuring the rifle recoil, consider the different methods of support, based on rigid body dynamics equations and collision theory, three kinds of rifle dynamics model, which included the holder, standing and the prone position had been established.
The rifle recoil curve of the different conditions had been calculated, analysis of the effects of different methods of support on the measurement of the rifle recoil.From the theoretically clarify the recoil is not a inherent properties of rifle.
In order to study factors influencing of the rifle recoil measurement, improved the test methods of rifle recoil.
Figure 4 Three attitude rifle recoil curve Conclusion Through the analysis found that recoil was not the weapon's natural, it related to the method of support and other factors in the process of shooting.
Mechanical system dynamics [M] Beijing，Defense industry Publishers 2010 [2] Bao Jiandong.

Results have shown that FCG curve (fatigue life) was affected by level of applied spectrum, consequently striation spacing.
The chemical compositions of studied material and mechanical properties at room temperature were given respectively by table 1 and table 2 and presented in Ref [19].
Table 1 Chemical composition of 2024 T351 Al-alloy Si Fe Cu Mn Mg Cr Zn Ti Ni Pb Al 0.105 0.159 3.97 0.449 1.5 0.05 0.109 0.018 0.02 0.056 Bal Table 2 Mechanical properties of 2024 T351 Al-alloy E (GPa) s0.2 (MPa) UTS (MPa) A (%) 74 0.159 3.97 0.449 The fatigue tests are performed on V-notch specimens with 45° angle in four bending.
At R=0.5, the fatigue life is affected by the amplitude of loading, where a decrease in number of cycles is significant [20].
Matsunaga: Transaction B-Mechanical Engineering Vol. 17(1) (2010), p. 75

The mode of handling the rope through the properties is an ideal solution for transport of the wagons, which led to finding ways to extend its life.
Of the many factors affecting the service life of wire rope, very important is its loading.
Individual factors do not act alone, but during the operation of the rope leads to current and mutual interaction of several factors.
Using of another tension members, for example chains (cell or Gall), is not suitable because the rope is the ideal solution just because of their elastic properties by engagement.
Boroška, Factors affecting life and operational safety of wire ropes, in: Investigation, Production and Use of Steel Ropes, Podbanské, Slovakia, 2000: pp. 15-21.

Using the Shigley method, the prediction of fatigue limit from calculated stress concentration factors was also examined.
Se=kakbkckdkeS'e (1) Notations: S'e = endurance limit of a rotating beam specimen ka = surface effect factor kb = size effect factor kc = reliability factor kd = temperature factor ke = 1/kf 4.2 Fatigue Life Prediction of Bolt and Comparison Shigley's method was used to predict the fatigue limit of M16 high-strength bolts.
The strain-stress curve shown in Fig.4 was used as property information.
Table 3 shows the aforementioned effect factors.
R., 1989, "Mechanical Engineering Design," McGraw-Hill, pp. 234~298

Comprehensive consideration of the various factors exist during processing process, derived out the more accurate experience formula of surface roughness on superalloy GH536 by EDG and obtained the higher significant level of regression equation by regression analysis.
The processing material is mainly made up of superalloy GH536 which has the ability of high temperature resistant and corrosion resistant, the properties of physical and mechanical is shown in table 1 [1].
GH536 Properties of physical and mechanical Physical property Density g/cm Melting point ℃ Thermal conductivity λ/(W/m℃) Specific heat capacity J/kg℃ Modulus of elasticity GPa Resistivity μΩm Coefficient of linear expansion a/℃ 8.28 1295~1381 13.38(100℃) 372.6 199 1.18 12.1(20~100℃) Mechanical properties Heat treatment σb MPa σs MPa δ % HBS Working temperature ºC Solution treatment 580~690 275~286 30 ≥241 800~1200 Processing principle EDG technology is applied into the procedure of fan-shaped electrode grinding honeycomb ring thin-walled parts.
Considering interaction among factors in actual processing and reduce work loads of test, orthogonal test table of two factors and three levels L9 (32) is adopted into test, the orthogonal test arrangement and test results is shown in table 3.
Considering the various factors during processing, derived out the more accurate experience formula of surface roughness on superalloy GH536 by EDG.

The simulation result shows this can significantly improve driving comfort, shift transient property and extend service life of clutch.
Introduction Traditional vehicles must separate clutch during the process of start-up and shifting, which affected by many factors such as environmental factors, vehicle operating status, the driver's willingness, etc.
Firstly, they analyze the impact of a motor on traditional powertrain system and how the motor affect the way of driving, braking and shifting.
This will can significantly improve driving comfort, reduce shift transient property and extend service life of clutch.
Moreover, it can significantly improve driving comfort, shifting transient property and extend service life of clutch.