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The mechanical and tribological properties of the coatings were evaluated by means of nanoindentation and ball-on-disc-tests.
The mechanical properties of the coatings were measured by means of a nanoindenter (G200, Agilent, USA).
Results Mechanical and tribological properties of the DLC coatings.
Table 1 illustrates mechanical properties of all tested DLC coatings.
The results of this work show that the hydrogen content in DLC coatings can significantly affect both their mechanical and tribological properties.

Kurniawan2,c 1Department of Mechanical Engineering, Universitas Jenderal Achmad Yani, Cimahi, Indonesia 2Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Skudai, Malaysia awibonda@yahoo.co.id, bsafian@fkm.utm.my, cdenni@utm.my Keywords: Bone drilling, Hole accuracy, Surface roughness, Cutting parameters.
Experimental Bovine bone has similar properties to human bone [7], so bovine femur was used as a workpiece in this study.
Rotational speed, geometry, and material of drill are factors that can affect natural frequency of the drill during machining, eventually affecting the diameter and the accuracy of drilled holes [12-16].
It was also found that cutting speed (or at least the range of cutting speed evaluated) does not affect the surface integrity measures.
International Journal of Advanced Manufacturing Technology. 60 (2012), p.853-863 [9] Chang Kuan Yu, Chang Hong Chang, Yu Pu Ping, Yen Ke Tien, and Huang Bo Wun, Natural Properties in a Micro Drill Cutting into Bones, Life Science Journal, Vol 6 (2009), p.28-33 [10] Ula¸s Çayda¸s, Ahmet Hasçalık, Ömer Buytoz, and Ahmet Meyveci, Performance Evaluation of Different Twist Drills in Dry Drilling of AISI 304 Austenitic Stainless Steel, Materials and Manufacturing Processes, 26 (2011), p.951–960 [11] N.

Although the strengthening of b-Ti-15-3 alloys can be generally achieved by the precipitation of uniformly dispersed fine a-phase in the b-matrix [2], the mechanical properties of titanium alloys can be also enhanced by grain refinement.
Microstructure and mechanical properties after THP of titaniumalloys have been comprehensively studied[5~7].However, most of them were focused on the THP ofa+b dual phases titanium alloys, especially for Ti-6V-4V, to improve processing and control the microstructure, and thereby improve final mechanical properties.
Bania et al. [11] demonstrated that the strength of Ti-15-3 alloy had been significantly affected if there was absorbing hydrogen before aged treatment, that is, a precipitates resulted from aged treatment was easy to react with hydrogen atoms to form a hydride, and thereby deteriorate the mechanical behaviors of Ti-15-3 alloy.
The purpose of this study is to investigate microstructure and mechanical properties after THP of Ti-15-3 alloy.
Toriyama,” Strength, Toughness and microstrucstural factors in Ti-15V-3Cr-3Sn-3Al alloy”, Metallurgy and Technology of Practical Titanium Alloys, Warrendale, Pennsylvania, 1994, pp.181-189

They usually combined macromolecular characteristics such as mechanical integrity and ease of processability, with the electroptic properties of low molarmass.
While chiral side-chain liquid crystals polymers, that is, cholesteric or chiral smectic C phases, have been attracted much interest because of unique properties and potential ferroelectric properties[4-6].
As it is known that copolymers are often combined by different molecular fragments and give rise to different properties in one materials.
In copolymer systems, chiral group and electron donor-acceptor group being introduced simultaneously should bring different properties.
Low Tg values for LCP are significant as the base of further application.The influent factors to Tg are summarized as the property of polymer backbone, the rigidity, sterical hinder and the interaction force between mesogenic and comonomer uint, the flexible spacer length and the content of comonomer.

Study of Graphite in Al2O3 Ceramic with Copper Matrix Li Changhong College of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China Keywords: Copper matrix, Graphite, Friction, Ceramal Abstract.
In these researches, as metal only servers as adhesive, the property of this ceramic with metal matrix is similar to ceramic, which has high wear resistance property, good heat resistance capacity, but low toughness and low plasticity [4-5].
This kind of ceramic with metal matrix has excellent comprehensive mechanical property.
When graphite content increases from 1% to 2%, friction factors decreases a large range, from 0.33 to 0.23.
Graphite does not affect friction factor remarkably, so friction factor decreases only a little, and wear and tear reduces a small range, too.

The creep and damage properties used are taken from Table 1.
The requirements for and the use of miniature test specimens to provide mechanical and creep properties of materials: - a review.
Creep properties and failure assessment of new and fully repaired P91 pipe welds at 923 K.
Determining high temperature properties of weld materials.
Shear correction factors in creep damage analysis of beams, plates and shells.

Factors influencing the formation and development of deformities.
Main Part Airfield and highway pavements throughout their entire life cycle are constantly exposed to a large number of negative factors that affect their technical condition and, as a consequence, ensure flight and traffic safety [5-9].
Main factors influencing pavement.
The physical and mechanical properties of basalt fiber are given in Table 4.
Physical and mechanical properties of basalt fiber.

Introduction Sapphire has great mechanical, optical and chemical properties , such as: high transmission rate , good thermal conductivity , wear resistance, corrosion resistance , hardness and other characteristics, therefore sapphire is the most commonly used material in the LED industry.
Table 2 Experimental factors Experimental factors Levels Aperture of nozzle (mm) 4 Blasting time (min) 2 Platform revolution velocity (rpm) 100~300 Nozzle-to-workpiece height (mm) 30~70 Impact angle (。)
Therefore, factors that affect the results of these parameters can be ignored.
It can be seen from the data in the table, the results display excellent reproducibility, so the interaction between experimental parameters affecting factors can be ignored and the demonstrates the effect of the sapphire substrate surface roughening.
Reflection properties of: (a) before AJP and (b) after AJP using #800 Zirconium abrasives.

There are three main factors causing density changes: solid phase formation, thermal shrinkage and liquid phase flow inside the mushy zone.
As a result a method of computer aided investigation of mechanical properties of mushy steel has been developed as well as experimental procedures conducted by using Gleeble 3800 thermo-mechanical simulator[13-18].
Such non-uniform temperature distribution is the source of significant differences in the microstructure and hence in material rheological properties.
Therefore, the study of multiscale modelling of mechanical properties is the main target of the future work.
Hwan, Phase-field modelling of the thermo-mechanical properties of carbon steels, Acta Mat. 50 (2002) 2259-2268

However, it was noteworthy that the alloy composition and fabrication process strongly affect the microstructure and properties of the alloy.
In addition, the previous study has reported that the presence of defects such as cracks, pores, and SiO2 inclusions have been thought to be major factors affecting accelerated oxidation [4].
Several studies were carried out to enhance the oxidation resistance and mechanical properties of transition metal dicilicides by adding alloying elements [3, 5-6].
Hoyer, Structural properties of liquid Fe-Si alloys, Journal of Non-Crystalline Solid 306 (2002) 90-98
Venugopal Rao, Effect of small aluminum additions on microstructure and mechanical properties of molybdenum di-silicide, Intermetallics 7 (1999) 213-232