CHERIF Saib

BENTAMEUR BADEREDDINE , DARAF ALI FETHI

Etude des différentes procédés de production de l'hydrogène

YAHIAOUI AYMEN , AMMARI ABDERRAOUF, TURKI KHALED

PROCEDES DE PRODUCTION D’HYDROGENE

Mohammed Hamitiche

DURCISSEMENT STRUCTURAL D'UN ALLIAGE D'ALUMINIUM SIMULE SOUS ABAQUS

DEHIM Aïssa , OULKHIR Abdeslam

Etude de conception d’une grue pour la récolte des dattes

SALEM Wassim , ZELLAGUI Mohammed

Soudage par friction des alliages d’aluminium 6063

LAADJEL Mohmmed El-Amine , BELABBAS Yacine

Réalisation d'une vibro-polisseuse métallographique

Drich youcef , Boudiaf youcef

Caractérisation mécanique d'un acier X-52 soudé par SMAW

Ben aissi Mouloud , CHENITI Hamza

CARACTERISATION MECANIQUE D'UN ACIER TRAITABLE X-52

SAHRAOUI Aboubakr

ETUDE DE LA CORROSION DES PIPELINES PETROLIERS

- SAHRAOUI AYMEN , BOUGUERA FATEH

Mini agitateur magnétique

Bourouma Dawoud , Aichaoui Noureddine

Etude de l'effet des cycles thermiques sur le superalliage à base Nickel INC738LC

Leboukh Amor , Guettouche Seifeddine

Soft robots

Hadjoussi Abdenour , Ameur Aymen

Distillation des déchets en plastique d'emballage

Mamlouki MOHAMMED , Boufares ABDELAAZIZ

« Etude et Réalisation d’une cheminée solaire».

Rais Mourad , Meftah Abdel fokani

Réalisation d'un mini mécanisme par imprimante 3D

Salamani Messaoud , Belaid Sofiane

Critères de choix des matériaux en construction mécanique

Bentahar Fayçal

« Etude d’un dispositif de retournement des châssis à l’ACI de M’sila »

Aroussi Hicham , Bahache Salah

Etude de l’influence des traitements pré thermomécaniques du superalliage INC 738 LC

Gharbi Soufyane

Etude de l’effet des traitements thermiques sur le superalliage Udimet 500 utilisés dans les turbines à gaz

Benyettou Bouhafs

Etude du soudage de superalliage Udimet 500 utilisés dans les turbines à gaz »

Lebci Abdelkader

influence des papiers abrasifs sur l’usure d’un superalliage à base Nickel Inc 738 LC

The study examines Cu-Zn-Al shape memory alloys, vital in aeronautics and automotive sectors. It aims to characterize their thermo-mechanical transformations induced by composition and heat treatments, focusing on how these impact mechanical properties, especially grain size refinement. Analysis covers transformation temperatures, micro-hardness, induced transformations, and mechanical tests. Results show thermoplastic martensitic transformations, with micro-hardness aiding in identifying characteristic points. The study's novelty lies in understanding how grain size refinement affects these transformations and the role of micro-hardness in precise characterization.

Citation

Cherif saib , , (2024-11-13), Elaboration and characterization of Cu–Zn–Al shape memory alloys, Pollack Periodica, Vol:20, Issue:1, pages:25-30, Akademiai Kiado

Over this study we calculated the coefficients of activity of different species and the concentration in the presence of H+ ion when H2SO4 is alone in solution. The coefficient of average activity was calculated using the model of Pitzer. The constants of dissociation of these reactions were calculated from the values of the free standard energies. The reaction reaches a balance while producing H+, HSO4 - and SO4 2-. The research reported here concentrated on the effect of some important operational parameters on dissolution process. The parameters were investigated and their ranges are as follows: initial molality ranging from 0.001 to 5 mol.kg-1 and temperatures between 25 and 200°C. Fortran 90 (Mathematical formula translating system) was used to perform all mathematical calculations. The numerical code can be used to calculate the molarity of ion H+ of an aqueous solution of sulfuric acid. The objective of the present work is to optimize the parameters of leaching such as activity of sulfuric acid on the dissociation phenomena.

Citation

Cherif saib , , (2023), Use of Pitzer’s model to calculate thermodynamic properties of aqueous electrolyte solutions of sulfuric acid, Journal of the Turkish Chemical Society Section A: Chemistry, Vol:2, Issue:10, pages:521–528, Turkish chemical society

Failure of overhead power lines usually occurs through conductor creep after several years of service. The best solution to investigate the creep behavior of the conductor in a very short time is to perform a creep test in the laboratory using a creep machine. In this present work, a fabricated horizontal creep testing machine was presented and tested by performing creep testing on electric aluminum wire used for the construction of overhead power lines. The different parts of this machine have been described. The main feature of this machine is the displacement acquisition system and the possibility of performing any test. The creep results obtained in this machine confirmed its good performance. The failure behavior of the aluminium wire was characterized by scanning electron microscopy.

Citation

Cherif saib , ,(2022), Construction of a Creep Testing Machine for the Study of Creep Failure of Electric Wire,5th International Conference on Power Electronics and their Applications (ICPEA 2022),University of Hail, Saudi Arabia

Use of Pitzer’s model to calculate thermodynamic properties of aqueous electrolyte solutions of sulfuric acid.

Citation

Cherif saib , ,(2022), Use of Pitzer’s model to calculate thermodynamic properties of aqueous electrolyte solutions of sulfuric acid,1st International Conference on Engineering and Applied Natural Sciences,Konya/Turkey

The effect of a pre (before) and post (after) heating welding treatment on the microstructure and mechanical properties of the scrap blades made of cast INC738LC superalloy is the main goal of the present investigation. The filler used in TIG welding was a INC 625 solution hardened superalloy as the proposed solution for hot cracking of the INC738LC cast superalloy in literature. The TIG welding was processed with respect to the constantly optimized parameters (current, voltage, speed, gas flux rate and number of passes) to make a mechanical properties comparison between the as received superalloy and the welded superalloy with heat treated specimens. The characterization techniques employed in this study are hardness measurements, tensile tests, optical microscopy and scanning electron microscopy. We found that the proposed preheating improves the TIG welding of the INC 738 LC superalloy specimens and the post welding heat treatment enhances its mechanical properties.

Citation

noureddine MENASRI , Cherif saib , Moussa ZAOUI , SALAH Amroune , H. Gauss, , (2020), EFFECT OF PRE-POST TIG WELDING HEAT TREATMENT ON CAST NI SUPERALLOY, ANNALS OF DUNAREA DE JOS UNIVERSITY OF GALATI, FASCICLE XII, WELDING EQUIPMENT AND TECHNOLOGY, Vol:31, Issue:, pages:35-42, Galati University Press

Purpose The purpose of this paper is to present the effect of the aging at 200°C on creep and hardening behavior of hardenable 6101 aluminum alloy manufactured by an industrial wiredrawing process used for construction of self-supporting overhead aerial power line conductors. Design/methodology/approach The creep tests were carried out under applied constant stress 100 MPa and constant temperature 150°C. Hardness measurements were also used to investigate the mechanical behavior of the aged alloy. Micrographs of the fractured wires by creep tests were performed by scanning electron microscope. Electrical resistivity of the aged alloy was measured at different time of the aging treatment. Findings The authors have found the relationship between the precipitation sequence, the mechanical properties and the electrical resistivity of aged 6101 aluminum alloy. Originality/value The optimum properties were also deduced.

Citation

Cherif saib , Souad Bettayeb, , (2019), Creep and hardening behavior of 6101 aluminum alloy manufactured by wiredrawing process, World Journal of Engineering, Vol:16, Issue:4, pages:445-451, Emerald Publishing Limited

The purpose of this study is to determine the appropriate welding parameters especially ‘supply energy’ on tensile behavior of welded Ni-base superalloy INC738LC, welded by a solution strengthened wire INC625 as filler using TIG welding technique. The supply energy (welding current), welding speed, impulse frequency, weld remelting number and grooves are the parameters of tungsten inert gas (TIG) arc welding. In this study the supply energy of TIG welding is the essential parameter which was taken as the unique variable (300 Watts, 400 Watts and 500 Watts) and the other parameters were kept constants. Welded specimens were investigated using tensile tests, Vickers’s micro-hardness tests. The results from the mechanical properties of welded joints show that the optimum weld supply energy was found to be 400 Watts.

Citation

Cherif saib , ,(2018), Effect of welding parameters on tensile behavior of Ni-based superalloy INC 738 LC,Conférence Internationale De Mécanique Avancée et des Energies Renouvelables CIMAER’2018,Boumerdès

Purpose The Ni-base superalloy INC738LC is a precipitation strengthened alloy and is widely used in hot sections of gas turbine engines owing to its excellent high-temperature strength and high hot corrosion resistance. The purpose of this study is to determine the appropriate welding current of Ni-base superalloy INC738LC after two passes of applying the tungsten inert gas (TIG) welding technique. Design/methodology/approach Ni-base superalloy INC738LC plates were joined by TIG welding technique by varying the welding current (30, 40 and 50 A). Welded specimens were investigated using optical microscopy, tensile tests, Vickers’s micro-hardness tests and X-ray diffraction (XRD). Optical microscopy was used to characterize fusion zone, heat-affected zone and base metal. Tensile test was conducted to characterize weld strength by determining ultimate tensile strength. Scanning electron microscopy was used to investigate the fracture surfaces after tensile tests. Micro-hardness test was conducted to characterize the welded joint. XRD was applied to determine precipitates formed after welding. Findings The ultimate tensile strength results show that the optimum weld current out of the three weld currents was found to be 40 A, which is the closest to that of the base metal. Originality/value Many researchers have worked to optimize welding parameters such as current and speed from the microstructural observations and mechanical properties of welded joints. The optimum weld current out of the three weld currents was found to be 40 A.

Citation

Cherif saib , , (2017), ’Effect of Welding Current Microstructures and Mechanical Properties of Welded Nibase Super Alloy INC738LC, World Journal of Engineering, Vol:15, Issue:1, pages:14-20, Emerald Publishing Limited

This paper is a contribution to the study of the microstructure in welded joint of INC 738 LC. It presents the microstructures obtained after real welding and also after thermal cycle simulation of welding by rapid heating and cooling treatments in specific simulation equipment. We were focusing on the temperature range [900°C, 1100°C] which is the temperature range of main phases occurrence, as coarse γ’primary, fine γ’ secondary and carbides. Optical microscopy and microhardness measurements were used as characterization techniques. We have found that the obtained microstructures by thermal cycle simulation of welding correspond to those observed in the same zone of the real welded joint performed by real welding.

Citation

Cherif saib , Zakaria boumerzoug, , (2017), Thermal Cycle Simulation of Welding Process in INC 738 LC Superalloy, Key Engineering Materials, Vol:735, Issue:1, pages:75-79, Trans Tech Publications, Switzerland