Search results

. – 20130, India 3Advance Ceramics Materials National Physical Laboratory, Delhi-110012.
Satellites in space, face severe thermal vacuum radiation threats in the long run which degrades many properties of their fabricated materials, especially those of outer most surface which face the maximum exposure.
Cross linked materials improve the long term performance.
Experimental Details Materials.
The absorption of light energy by polymeric materials in UV and visible regions involves transition of electrons in s, p and n- orbitals from the ground state to the higher energy states.

Peritectic reaction of high Nb and W pentatomic TiAl-based alloy Hongliang Sun, Cai Sun, Zewen Huang and Degui Zhu Key laboratory of advanced technologies of materials(ministry of education), Southwest JiaoTong University, Chengdu ,China sunhl@swjtu.edu.cn Keywords: TiAl-based alloy, peritectic reaction, aluminum content, microstructure, mechanical properties.
Introduction Titanium aluminum (TiAl) alloys have been considered as viable structural materials for high-temperature application because of their attractive high elevated-temperature strength, higher creep resistance, good oxidation resistance and specific strength properties[1-2].
Thus, its alloys are promising structural materials for use in aerospace, automobile engines and gas turbine industries[3-5].
Dahms: Advanced Performance Materials.
Forum Vol.8 (2000), p. 1283 [5] X J Xu, J P Lin, Y L Wang: Journal of Alloys and Compounds.

At present, the project cost, schedule and quality in the construction contract are not up to standard [1], the existing problems of cross-sea bridge construction projects in contract management are: (1).the contract management efficiency is not high ;( 2).the enterprise contract management legal awareness is not strong. some relative laws are not perfect, the engineering contractor is in a passive position, and faced with very unfavorable contract signing and implementation of environmental, a small number of the contract is unfair;(3). in some engineering practice, the main qualification review of the construction contract is not tight, the construction of the terms of the contract responsibility is not clear, Some companies underestimated the risk of price fluctuations for construction materials and equipment, do not attach importance to the contract management system and system, and lack of effective supervision and control of the execution of the contract; (4). some construction enterprises
The cross-sea bridge construction contract management business scope includes: schedule control, drawings and specifications, construction equipment, materials, construction quality control, construction conditions, safety inspection, site meetings, information management, contract changes and claims, project risks and reasonable burden, engineering, inspection, labor service and subcontract management, arbitration and dispute processing, file management [4].
As the complex cross-sea bridge hydrological and geological conditions, and construction influenced by the marine construction conditions, waves, currents and hydrodynamic forces, materials supplies, operating space and other factors, on the other side, many construction ships, the working platform will bring safe production the difficulties and problems.
Journal of Kaili University.4 (2011).
On the Construction Contract Management of Construction Projects.Science Mosaic.11 (2008).

The customised bone scaffolds are porous materials and their properties and mechanical behavior are largely determined by their porous microstructure.
Table 3 Machine Details Effective building volume 200[mm]*250[mm]*330[mm][7.9*9.8*13 in] Building speed (material-dependent) Up to 24mm height/h[0.94 in/h] Layer thickness (material-dependent) Typically 0.1mm [0.004 in] Support structure Not necessary Laser type CO2, 30w Precision optics f-theta lens Scan speed during build process Up to 5 m/s [16.4 ft/sec] Wall thickness Not less than 1[mm] Laser beam diameter Approximately 0.6-0.7[mm] Accuracy-Dimensions<100[mm] +/-0.1[mm] Accuracy-Dimensions>100[mm] +/-0.3[%] Fig. 5 Polyamide bone scaffold Fabrication.
Journal of Materials science: Materials in Medicine 12, 471-478

All component parts have assigned materials; from SolidWorks materials library, stainless steel (ferritic) is chosen for the links 1j.
The fatigue (S-N) curve for link 1j material, provided by SolidWorks software, is shown in Fig. 12.
Baeker, Mechanical Behaviour of Engineering Materials, Springer - Teubner Verlag, Wiesbaden, 2006
Vela, Dynamic Study of Low Level Links of a Parallel Topology Robot Guiding Device Using Finite Element Method, Models and Methods in Applied Sciences.
Nonami, A 3D Simulator Modelling for Hydraulic-Drive Hexapod Walking Robot Using 3D Geometric Technique with Distributed Numerical Model, ICGST- ARAS Journal.

Introduction The production of ceramic fibers with diameter at submicron and nanometric scales has manifested great interest in the science and technology fields due to its potentiality of high performance applications offered by these materials.
This tendency is related to their small dimensions, which provide high surface area /volume ratio and high aspect ratio, making these materials to present new and extraordinary physical, chemical and mechanical properties.
This new method has been used successfully for the production of micro and nanofibres of various materials [5-7].
Materials and Methods To obtain the nanofibers, the following reagents were used: Poly(vinyl) pyrrolidone (PVP), absolute P.A. ethyl alcohol, tetraethylorthosilicate (TEOS), hydrochloric acid (HCl), silver nitrate (AgNO3) and dimethylformamide (DMF).
Khosroshahi: Journal of the Textile Institute Vol. 101 (2010), p. 204.

Low-cycle Fatigue Behavior of Three Die Cast Magnesium Alloys Changyi Wang1,2,a ,Zhen Liu 1,b, Lijia Chen1,c 1 School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China 2 Department of Materials Engineering, Bohai Shipbuilding Vocational College, Huludao125000, China a cywang1969@yahoo.com.cn,b liuzh@sut.edu.cn,cchenlj-sut@163.com Key words: magnesium alloy; cyclic deformation; low-cycle fatigue; cyclic hardening Abstract.
Experimental procedure The materials used for present investigation are AZ91HP, AM50HP, AE42 die cast plates.
Froes:Advsnced Performance Materials 5(1998),p.201 [2]I.J.Polmear:Mater.
Eifler:International Journal of Fatigue 26(2004),p.1357 Table 1.

Introduction It is well known that environment should be protected by adopting eco-friendly materials, which necessitated the development and investigation of biodegradable polymers.
It is one of the most popular biodegradable polymers materials for its better physical property and thermoplastic and biological properties.
Materials and Methods 13 Polylactic fibers were selected for elementary analysis, gas chromatography mass spectrum, IR spectrocopy, Ultraviolet testing and X-ray tests.
So, it can not be used to have an identification of PLA fiber with other fibers, while it can be used good anti ultraviolet light materials.
Shafer: Journal of Industrial Textile, Vol.59 (1998), p. 145-152 [5] X.

Profilograms of grooves wear of rear gland neck surface for seal made of high-strength cast iron 75-50-03 after finishing with: a) polishing; b) wide burnishing Results and Discussion Surface roughness of the metallic shaft has a decisive role in friction and wear of rubber seal due to the significant difference of mechanical properties (hardness, modulus of elasticity) of friction materials.
In particular within the research were received comparison results of burnishing and polishing processing: width of the grooves wear was 936 microns and 1152 microns, depth was 2.16 and 4.94 microns respectively; - compliance of the specimens surface with surfaces of the real parts (material sort, hardness, manufacturing method, processing modes, instrument); Studies have shown that the dependence of the main indicators of the surface layer quality on the burnishing technological factors similar to the typical curves for other metallic materials.
Komvopoulos A slip-line plasticity analysis of sliding friction of rough surfaces exhibiting self-affine (fractal) behavior, Journal of the Mechanics and Physics of Solids, 60(3) (2012).
Melnikov, A.A., Lukyanov, Environmental Aspects Of The Green Surface Plastic Deformation Technology Of Car Parts, IOP Conference Series: Earth and Environmental Science, 50 (2017) 012015
Khaimovich The study of plastic deformation at high strain rates in upset forging of cylinders, Key Engineering Materials, 684 (2016) 74-79.

Introduction Durability is one of the characteristics of construction materials that is important, especially on structural elements in aggressive environment.
Thus it is a special concern to have higher durability property in the material.
The total of cementitious material was set at 400kg/m3.
International Conference on Durability of Building Materials and Components, 10.
Journal of Engineering Science and Technology Review, Vol.3, No.1 , pp. 36-40