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Nombre total de résultats :1696
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Impact resolution methods of contact on themechanical behavior of structures

Boura Mohammed, BENZEGAOU Ali  (2016)
Article de conférence

Contact problems are inherently non-linear due tothe instability of the contact surface. The analysis of theseproblems has a great importance in the industrial applications. Inmany industrial processes of working such as stamping, rollingand forming, the phenomena of contact play an essential... Voir les détails

Mots clés : contact, methods, penalties, AugmentedLagrangian, mechanical behavior.

Study of the structural evolution of Ni50%atAl50%at mixture during mechanical alloying

M.Bendoumia, K Taibi, M.Azzaz  (2016)
Article de conférence

In this study elemental powder of 50 %.at Ni and50 %.at Al mixture was mechanically alloyed in planetary ballmill Retsch PM400, for a predetermining time until 48h. Using Xraydiffraction and scanning electron microscopy (SEM) it wasobserved that milling of powder leads to the formation of... Voir les détails

Mots clés : NiAl alloy, X-ray diffraction, SEM, laser granulometry

Numerical analysis of Hydrogen embrittlement ofhigh strength steels using Monte Carlo method

Soumia Ourrad, F. Javier Belzunce, Youcef Houmadi, Abdelkader Ziadi  (2016)
Article de conférence

A probabilistic approach has been applied tohydrogen desorption phenomena in the wire rod for pre-stressedconcrete. The phenomena was treated in a deterministic study byCarneiro in 2010 , this work aims to reflect uncertainty propertyof the material of a high carbon steel such as effective... Voir les détails

Mots clés : hydrogen embrittlement, the probabilistic simulation method of Monte Carlo, spatial variability.

Experimental study of shot peening effect onthe surface of austenitic stainless steels :roughness, residual stresses and workhardening

Mohamed Chaib, Mohamed Belhamiani, Abdelkader Megueni, Abdelkader Ziadi, Javier Belzunce  (2016)
Article de conférence

Shot peening is a mechanical surfacetreatment widely used in automotive and aerospaceindustries to enhance the fatigue life of mechanicalparts. In this process, many small and hard particles,called shots, are projected at high velocities on to thesample. The multiple impacts plastically deform... Voir les détails

Mots clés : -shot peening, residual stresses, work hardening, Almen intensity, roughness, FWHM.

Study of nickel silicide by X- ray diffraction

H. Fiad, R. AYACHE, A. Bouabellou, C.Sedrati  (2016)
Article de conférence

In order to understand fully the results from X-ray diffraction oscattering analysis, it is benefecial to understand the interactionsbetween X-rays and matter. X-ray methods are generally nondestructive, in that sample preparation is not required, and they canprovide a very appropriate route to... Voir les détails

Mots clés : thin film, nickel silicides, X-ray, XRD

Effect of roller burnishing parameters on roughnesssurface and hardness of steel S355J0 specimens byusing response surface methodology

Mohamed Tourab, Hamid Hamadache, Salim Belhadi  (2016)
Article de conférence

Burnishing is a cold working process with superficialplastic deformation, which is to exert an external pressurethrough a very hard and smooth roller or ball on a surface tooccurs a uniform and work-hardened surface, makes it possibleto reduce roughness, to increase the hardness and to... Voir les détails

Mots clés : roller-burnishing, steel S355J0, surface roughness, superficial hardness, response surface methodology

Influence of sintering temperature on thedensification of copper matrix composite reinforcedwith CoAl particle developed by SHS

kahina kheloui, Said Azem, Mustapha Nechiche  (2016)
Article de conférence

This work focuses on the influence of the sinteringtemperature of a copper matrix composite and CoAl particlesproduced by SHS (Self Propagating High temperatureSynthesis).In a first step, Co-50at.%Al mixture is sintered at 950°C to obtainthe CoAl compound that will be milled for 24 hours... Voir les détails

Mots clés : composite materials, intermetallics, SHS, SEMEDS X, XRD

Behaviour of dislocations near phaseboundaries in the anisotropiclinear elasticity theory

A.Ouchtati, O.Khalfallah  (2016)
Article de conférence

The image force undergone by amatrix dislocations close and parallel to aninterphase boundary is studied in Ag-X bicrystalswith X : Pb, Cu and Ni for disorientations rangingbetween 0° and 90°. The elastic energy of dislocationboundaryinteraction is calculated within theframework of... Voir les détails

Mots clés : nterphase Boundary, Dislocation, Elastic Interaction, Image Force, Anisotropic elasticity, CFC Structure.

Study Ni70al20Si10prepared by mechanical alloying

R.Bellili, S.Taane, K.Taibi, kh.khenfer.  (2016)
Article de conférence

Alloys based on nickel, aluminum and siliconhave been extensively studied because they are of great interestfor high temperature structural applications (low density, highspecific strength, greater resistance to oxidation, hightemperature resistance). The properties of these materials can... Voir les détails

Mots clés : intermetallic alloy, Mechanical Alloying, Aluminum- Nickel-Silicon, SEM, XRD

Fatigue properties estimation based on hardnessmeasurements and tensile properties of a dissimilar weldjoint

K Bettahar, A Brik-chaouch, A Mokhtari, N Tala-ighil, M Bouabdallah, M Gaceb  (2016)
Article de conférence

This work aims to estimate the high cycle fatigue properties of a dissimilar weld joint madeof 2205 duplex and 13% Cr supermartensitic stainless steels. The filler metal used is the2507 superduplex stainless steel. Two methods were used; one is a direct method thatconsists of experimental fatigue... Voir les détails

Mots clés : Dissimilar weld joint, fatigue, duplex, Supermartensitique, superduplex