M. ABID Tahar

MCA

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Department

BASE COMMON ST Departement ST

Research Interests

Physique des matériaux , Sciences des matériaux , Alliages métalliques , Alliages légers, mise en forme à l'état solide , Tréfilage , ,Soudage et techniques connexes

Contact Info

University of M'Sila, Algeria

Email : tahar.abid@univ-msila.dz

On the Web:

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Recent Publications

2024-11-29

Experimental Analysis of Wire Drawing Influence on Microstructure, Texture, and Mechanical Properties of High-Carbon Steel for Prestressing Strand

The study aims to explore high-carbon steel’s behavior during cold drawing, focusing on the link between microstructural changes, texture, and mechanical properties at different strain levels. Using X-ray diffraction, scanning electron
microscopy–electron backscatter diffraction, micro- and nanoindentation, and wear analysis, findings show that grain size and interlamellar spacing decrease as strain increases, and pearlitic colonies become more compact and aligned.
This refinement leads to significant hardening, from 333.8 HV in the wire rod to 470.4 HV at 2.05 strain, aligning with the Hall–Petch law. The <110> fiber texture develops linearly, and a higher dislocation density is noted at lower strain
rates, with low-angle grain boundaries increasing from 65.2% to 76.5%. The cold drawing process is thus divided into two phases, marked by a shift from low-angle grain boundaries dominance and a notable reduction in wear rate
compared to severely deformed states
Citation

M. ABID Tahar, (2024-11-29), "Experimental Analysis of Wire Drawing Influence on Microstructure, Texture, and Mechanical Properties of High-Carbon Steel for Prestressing Strand", [national] Steel research international , 2024 Wiley-VCH GmbH

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2023-11-21

Precipitation and Age Hardening in Al-Mg-Si-(Cu) Alloys for Automotive Body Sheet

Abstract : This present work is focused on the hardening precipitation in two AlMgSi(Cu) automotive body sheets. The effect of pre-aging, aging treatment and 0.10 wt % copper addition on the hardening response was investigated using scanning calorimetry (DSC), transmission electron microscopy (TEM), and Vickers microhardness measurements (Hv). The results reveal the apparition of α-AlFeSi, α-AlFe(Mn)Si type precipitates frequently present and witch remain stable at high temperature in Al-Mg-Si alloys. Indeed, the hardening response in both sheets is certainly due to the predominance of very fine typical phases β' and β'' as rods and needles developed during aging with and without pre-aging. The effect of pre ageing just after homogenization and quenching is to correct the undesirable effect of aging at ambient temperature by making faster alloy hardening during artificial aging.The addition of 0.10 wt % copper has allowed to refine and to enhance the precipitation hardening after quenching.
Citation

M. ABID Tahar, (2023-11-21), "Precipitation and Age Hardening in Al-Mg-Si-(Cu) Alloys for Automotive Body Sheet", [international] International Conference on Mining, Material, and Metallurgical Engineering , Istanbul, Turkey

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2023-11-18

Welding electrodes and high strength steel strands for stressed reinforcement: Manufacturing process and industrial perspective

Abstract : Plenary Presentation
Depuis sa création en 1979, l’unité de production TREFISOUD/ENTPL, est reconnue en tant qu’un spécialiste dans le domaine de fabrication et commercialisation des produits de soudage et les produits tréfilés. En effet grâce à sa gamme de fabrication diversifiée allant des électrodes universelles à celles de rechargement, électrodes spéciales aux fils tréfilés ,claires, galvanisés et recuits couvre l’essentiel des besoins du marché national en ces produits. En 2004 , l'unité s'est dotée par de nouvelles de production des fils pour béton précontraint. Récemment en 2018, production des TORONS avec une gamme large et diversifiée (Ø variant de 6,85 à 17,78 mm de classe 1860 N/mm²).
La précontrainte est un concept inventé par Eugène Freyssinet en 1933. Ce terme signifiant « contraint avant » - indique que le béton est soumis à un serrage préalable.. Le béton précontraint est alors soumis à une compression qui se superpose aux éventuelles tractions réduisant ainsi les risques de fissuration.. Initialement développé dans le domaine des ponts, le béton précontraint s’est largement étendu à l’ensemble des ouvrages du domaine de la construction, dont celui du bâtiment. Les fils de précontrainte constituent une nouvelle gamme de produits fabriqués en Algérie par TREFISOUD. Ces fils en aciers à haut carbone sont d’une importance capitale dans la fabrication des ouvrages d’art .
Citation

M. ABID Tahar, (2023-11-18), "Welding electrodes and high strength steel strands for stressed reinforcement: Manufacturing process and industrial perspective", [international] International Conference on Materials for Renewable Energies (ICMRE'23) , Ferhat ABBAS University , Setif

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2023-09-29

Effect of Heat Treatment on Microstructure and Mechanical Properties of Medium-Carbon Steel Drawn Wire

Abstract:
In this article, the effect of heat treatment on the microstructure and mechanical behavior of medium-carbon steel wire intended for the spring mattress is investigated using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), X-ray diffraction, Vickers hardness (Hv), and tensile strength. The results indicate that the microstructure elongation along the wire axis is observed with the bending and kinking lamellae at the deformation level of 57.81%, this change appears as a fracture in the microstructure and leads to an increase in hardness, tensile strength, and intensities of diffraction patterns. After heat treatment, we observed a redistribution in the grain, which is almost the same in the wire rod and drawn wires; indeed, this led to a decrease in hardness, tensile strength, and augmentation in intensities of peaks. The EBSD pole figures reveal the development of texture in the cementite slip plane (001).
Citation

M. ABID Tahar, (2023-09-29), "Effect of Heat Treatment on Microstructure and Mechanical Properties of Medium-Carbon Steel Drawn Wire", [national] SAE International Journal of Materials and Manufucturing , SAE International in United States

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2023

Additive Manufucturing of metallic alloys and Composites

Additive Manufucturing of metallic alloys and Composites : Acadimic and Industrial Perspective
Citation

M. ABID Tahar, (2023), "Additive Manufucturing of metallic alloys and Composites", [international] Internatiopnl Symposium on Additive Manufucturing of metallic alloys and Composites , JABALAPUR -INDIA

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EFFECT OF DEFORMATION RATE ON THE MICROSTRUCTURE AND DRAWABILITY OF MEDIUM-CARBON STEEL

The effect of deformation rate on the evolution of microstructure and the drawability of a wire from medium- carbon steel D45-2 to at a true strain t= 1.70 and t = 2.70 is investigated. The microstructure of thewires is studied by scanning electron microscopy, electron backscatter diffraction, crystallographic analysis of texture and tensile tests. It is shown that the behavior of the structure and the deformability of the wires under drawing depend much on the deformation rate. The drawing refines the grains and stretches them in the drawing direction (WDD). A crystallographic fibrous texture 110  WDD develops especially intensely at the higher strain rate t = 2.70; the tensile strength grows considerably due to elevation of the dislocation density.The wire from the medium-carbon steel is shown to undergo high deformation without failure during the drawing.
Key words: medium-carbon steel, true strain, drawing of wire, microstructure, texture, deformability, fracture.
Citation

M. ABID Tahar, (2023), "EFFECT OF DEFORMATION RATE ON THE MICROSTRUCTURE AND DRAWABILITY OF MEDIUM-CARBON STEEL", [national] Métal science and heat treatment , 0026-0673/23/0910-0495 © 2023 Springer Science+Business Media, LLC

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2022

The conference , AI and Startups

The Conference will act as a major forum for the exchange of practical experience including:innovative
ideas developments, research/application projects in the areas of Higher education, innovative ideas developments,
Citation

M. ABID Tahar, (2022), "The conference , AI and Startups", [international] The confrence TC 22 , Algérie

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effect of deformation rate microstructure and drawability of medum carbon steel wires

The effect of cold deformation on microstructure and drawability of medium steel wire drawn under wiredrawing reductions up of 94.5% is investigated using scanning electron microscopy (SEM) electron backscatter diffraction (EBSD) to examine microstructure evolution and the crystallographic texture analysis and tensile tests to measurement and to estimation of drawability. Three experimental conditions are studied, as received wire rod, wires drawn respectively at true strain ε =1.70 and ε =2.70. The results indicate that the drawability and microstructure evolution of medium carbon steel wires are well sensitive to deformation rate. The microstructure is clarified in dependence on the strain level. It can be seen clearly that after wiredrawing there is a redistribution of grains along the wire drawing direction (WD) and the size of grains is refined and became smaller, also the evolution of the crystallographic texture reveals the development of a fiber texture <ll0> //WD at low strain and is intensified at higher strain, As well, tensile strength increases by increasing the drawing strain. As a result, drawability of medium carbon steel wire reveals a high level of deformation at which the wire drawn may be plastically deformed prior to fracture
Citation

M. ABID Tahar, (2022), "effect of deformation rate microstructure and drawability of medum carbon steel wires", [national] etal Science and Heat Treatment, Springer Verlag, In press. ⟨hal-03810688⟩ , Springer Verlag, In press.

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2021

Wire drawing effect on microstructural and textural evolution in medium carbon steel wires

his study was mainly oriented on the evolution of the crystallographic texture as a function of the deformation resulting from the industrial wire drawing process. This, in fact, will make it possible to establish a relationship between the microstructure and the crystallographic texture in the medium carbon steel wires obtained by industrial wire drawing process and used in the manufacture of spring mattresses in order to minimize the loss of material and to satisfy the users of this product. During this study, a medium-carbon steel wires was characterized by two analytical techniques. The scanning electron microscopy (SEM) to monitor the microstructure evolution and the electron backscatter diffraction (EBSD) for the crystallographic texture analysis. The EBSD results are processed with OIM (Orientation Imaging Microscopy) analysis software.
Citation

M. ABID Tahar, (2021), "Wire drawing effect on microstructural and textural evolution in medium carbon steel wires", [international] Defect and Diffusion Forum , Trans Tech Publications Ltd

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2020

Mechanical Properties and Texture Evolution of High-Carbon Steel Wires during Wire Drawing: Strand Manufacturing

Abstract. In this paper, the evolution of texture in the ferrite phase and mechanical behavior of colddrawn
pearlitic steel wires produced for strand manufacturing at Trefisoud company was investigated.
Wire drawing induces the development of dislocation density, reduction of interlamellar spacing and
the refinement of grains size which leads to a strong hardening of the wires. That explains the increase
of the tensile strength from 1242 MPa to 2618 MPa with higher deformation. Also, the cementite
lamellae are rotated toward the drawing axis and the thickness of lamellae further decreases when
strain level increases, this phenomenon leads to a somewhat fibrous structure. The quantitative
analysis obtained by EBSD data shows the development of a strong (<110> // ND) texture of the
ferrite phase leading to a structural transformation from isotropic to anisotropic.
Citation

M. ABID Tahar, (2020), "Mechanical Properties and Texture Evolution of High-Carbon Steel Wires during Wire Drawing: Strand Manufacturing", [national] International Journal of Engineering Research in Africa , 2020 Trans Tech Publications Ltd, Switzerland

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Microstructure and mechanical behavior of a high carbon steel wire

The high-strength steel strands are used in the constructions of prestressed concrete as well in a many in-dustrial applications such as : hoisting loads, aerial cable-ways, the bridges decks, suspension cables,, the retaining walls, the petroleum platforms, airports etc. They are composed of drawn steel wire twisted helicaly around an axial wire. These wires are obtained by the wiredrawing process of a hard perlitic steel wire of carbon concentration close to the eutectoid composition followed by a thermo-mechanical treatment of stabilization. The main goal of this work is to undertake a preliminary characteristic study of high-carbon steel wire rods used for the manufacture of strands. The two wires which are in a rough state of hot rolling are investigated by the following experimental techniques : Vickers microhardness and the X-ray diffraction analysis.
Citation

M. ABID Tahar, (2020), "Microstructure and mechanical behavior of a high carbon steel wire", [international] First International Conference on Materials, Energy and Environment ElOUED University , EL OUED ALGERIE

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2019

Fabrication et Contrôle des Électrodes de soudure et Armatures de précontrainte (Fils &Torons )

Les origines du soudage moderne datent de l’afin du 19eme siècle et le début du 20eme siècle.Les premières expériences dans le soudage furent avec une âme métallique nue. En 1904 l’ingénieur suédois Oscar KJELBERG développa et breveta un système d’enrobage qui permet de protéger la fusion de soudure des contaminations atmosphériques (oxydation et nitruration ). C’est le début de développement rapide et prodigieux de la soudure à l’arc. En 1905, il fonda ESAB¨qui devenait plus tard le leader mondial dans le domaine du soudage et les techniques connexes.
La « précontrainte » est un concept inventé par Eugène Freyssinet en 1933. Ce terme signifiant « contraint avant » - indique que le béton est soumis à un serrage préalable. le béton précontraint est alors soumis à une compression qui se superpose aux éventuelles tractions réduisant ainsi les risques de fissuration. - Initialement développé dans le domaine des ponts, le béton précontraint s’est largement étendu à l’ensemble des ouvrages du domaine de la construction, dont celui du bâtiment.
Citation

M. ABID Tahar, (2019), "Fabrication et Contrôle des Électrodes de soudure et Armatures de précontrainte (Fils &Torons )", [national] LES PREMIÈRES JOURNÉES D'ETUDES TECHNOLOGIQUES SUR LES MATÉRIAUX DE CONSTRUCTION , Sétif -Algérie

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Microstructural Evolutions and Mechanical Properties of Drawn Medium Carbon Steel Wire

This study focuses on the evolution in the microstructure, texture and mechanical
properties of medium carbon steel wires obtained by wire drawing at Tréfissoud Company for the
manufacturing of the spring mattress. Wire drawing induces elongation of grains in the direction of
drawing with the development of the <110> fiber texture parallel to the wire axis. Kinking and
bending of cementite lamellae were observed during the drawing process. The work was carried out
respectively on three states, wire rod and drawn states for two different amounts (ε %=43,6 and 60
%), using the optical and SEM microscopy, electron backscatter diffraction and X-ray diffraction
analysis for examination of the microstructure and texture evolution, the hardness Vickers and
tensile test to follow the curing of the studied wires.
1. Introduction
Citation

M. ABID Tahar, (2019), "Microstructural Evolutions and Mechanical Properties of Drawn Medium Carbon Steel Wire", [international] International Journal of Engineering Research in Africa , Trans Tech Publications , Suitzeland , Suitzerland

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2018

The Relationship between microstructure and mechanical properties of strand Steel wires

In this research, the relationship between
microstructure and mechanical properties of Steel strands
containing a nearly fully pearlitic structure is investigated.
strands Steel used for different engineering and industrial
applications such as : hoisting loads, aerial cable-ways, the
bridges decks, suspension cables, the retaining walls, the
petroleum platforms, airports etc. because they offer a right
combination of strength and ductility. They are composed of
drawn steel wire twisted helicaly around an axial wire. These
wires are obtained by the wiredrawing process of a hard
perlitic steel wire of carbon concentration close to the eutectoid
composition followed by a thermo-mechanical treatment of
stabilization. The main goal of this work is to undertake a
preliminary characteristic study of high-carbon steel wire rods
intended for manufacture of strands. The two wires which are
in a rough state of hot rolling are investigated by the following
experimental techniques : Microstructure, Vickers
microhardness, Tensile test and X-ray diffraction analysis
Citation

M. ABID Tahar, (2018), "The Relationship between microstructure and mechanical properties of strand Steel wires", [international] International symposium on mechatronics & renewable energies -ISMRE018 , ELOUED ALGERIE

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Study of Microstructural and Mechanical behavior of Mild Steel Wires Cold Drawn at TREFISOUD

The aim of the present work is to study the evolution of microstructure, texture and
mechanical properties during drawing of mild steel wire of type F8Z used in the manufacture of
welding electrodes TREFISOUD. It was found that the as received wire has a ferritic-pearlitic
microstructure corresponding to an isotopic state (without texture). This microstructure is relatively
heterogeneous in the wire section. On the other hand, after strong drawing structure appears
relatively homogeneous, throughout the section of the drawn wire. Also the deformation process by
drawing causes the hardening of wire as a function of deformation with a reinforcing component of
the fiber texture <110> // ND (majority), typical for bcc materials. Characterization methods used in
this work is: Optical microscopy (OM), Scanning Electron Microscopy (SEM), the Electron Back
Scattered Diffraction EBSD, Vickers microhardness and the tensile tests.
Citation

M. ABID Tahar, (2018), "Study of Microstructural and Mechanical behavior of Mild Steel Wires Cold Drawn at TREFISOUD", [national] International Journal of Engineering Research in Africa , Trans Tech Publications , Suitzeland

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2017

Caractérisation des propriétés microstructurales et mécaniques des fils en acier mi-dur pour la fabrication des ressorts pour matelas

Wire drawing process is a cold metal forming in which the diameter of the wire is reduced by plastic deformation, in the presence of a dry lubricant powder, called soap.
This study focuses on the characterization of mechanical and microstructurals properties of medium carbon steel wires obtained by wiredrawing at Tréfissoud Company in the manufacturing of the spring mattress. The study was carried out respectively on the two states, wire rod and drawn state 60%, using the optical microscopy for examination of the microstructure, The X-ray diffraction analysis, and the microhardness to follow the curing of the studied wires.
Citation

M. ABID Tahar, (2017), "Caractérisation des propriétés microstructurales et mécaniques des fils en acier mi-dur pour la fabrication des ressorts pour matelas", [international] 3ème Conférence Internationale de Mécanique (ICM'17) , Annaba Algérie

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Caractérisation et contribution au choix des fils en acier dur pour la fabrication des torons précontraints

Les torons en acier à haute resistance sont utilisésdans les constructions en béton précontraint aussi bien enprétension qu'en post-tension telles que : les ponts, tablierset câbles de suspension, les murs de soutènement, lesplates-formes pétrolières, les aéroports etc, sont composés defils d’acier tréfilés torsadés hélicoïdalement autour d’un filcentral. Ces fils obtenus par le procède de tréfilage d’un fild’acier dur perlitique de teneur en carbone proche à lacomposition eutectoïde suivi par un traitement thermomécaniquede stabilisation. Le but de ce travail est d’apporter unecontribution au choix de fils en acier dur destiné pour lafabrication des torons précontraints tout en se basant sur lacaractérisation de la microstructure, les propriétés mécaniquesà savoir , la microdureté et la traction de deux fils à l’état brutde laminage .
Citation

M. ABID Tahar, (2017), "Caractérisation et contribution au choix des fils en acier dur pour la fabrication des torons précontraints", [international] International Congress on Advanced Technologies (ICAT'17) , Safi -Maroc

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TUDE DE COMPORTEMENT AU TREFILAGE DES FILS EN ACIER DOUX DESTINES POUR DES APPLICATIONS INDUSTRIELS

Dans cette étude, on a examiné l'influence de la composition et de la structure initiale du fil en acier doux destiné pour des applications industriels (fabrication des électrodes de soudure, la galvanisation à chaud... etc), ainsi que celle des conditions de tréfilage sur les caractéristiques mécaniques (dureté) des aciers à bas carbone. Un traitement préliminaire de décapage chimique ou mécanique, effectué avant tréfilage, permet d'améliorer les conditions de tréfilage. Ce procédé de mise en forme fait intervenir principalement des phénomènes de durcissement par écrouissage et de consolidation des propriétés mécaniques, dont certains évolutions et aspects ont été étudiés.
Citation

M. ABID Tahar, (2017), "TUDE DE COMPORTEMENT AU TREFILAGE DES FILS EN ACIER DOUX DESTINES POUR DES APPLICATIONS INDUSTRIELS", [international] Revue Science des Matériaux, N°09, Mai 2017 pp.36..... , Université de Biskra Algérie , Ghardaïa–Algérie

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Technologie de fabrication et contrôle des électrodes de soudure

La fabrication des électrodes enrobées relève de divers procédés et techniques qui constituent la base de technologie de fabrication en passant essentiellement par le procédé d’extrusion qui consiste à enrober les baguettes de fils en acier doux dans la pâte obtenue par mixture des différents minéraux et oxydes métalliques, alumino- silicates et métaux en poudres avec des liants à bases de silicates . les électrodes extrudées enrobées doivent subir directement le séchage et la cuisson . Le contrôle de qualité des électrodes constitue également une étape cruciale avant le conditionnement et le stockage approprié de ces produits .
Citation

M. ABID Tahar, (2017), "Technologie de fabrication et contrôle des électrodes de soudure", [national] formation doctorale - matériaux et structures , Biskra

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2011

Effect of Preaging and maturing on the Hradening Precipitation of AlMgSi Alloy

The effect of pre-aging and maturing at room temperature on hardening response of an Al–Mg–Si alloy is investigated using differential scanning calorimetry (DSC), hardness measurements (Hv) and scanning
electron microscopy (SEM). Two experimental conditions are examined. First, natural aging for different times (3 weeks and 1 month) followed by artificial aging at 180 ◦C as function time. Second, pre-aging at
temperatures in the range 75–100 ◦C followed by artificial aging at 180 ◦C after natural aging for the same periods. The present results indicate that the effect of the pre-aging just after the heating and quenching is
used in order to correct the undesirable effect of aging at room temperature. However, during the artificial aging, the alloy hardening becomes faster. Aged samples which have already undergone pre-aging and
maturing reveal the better hardening response.
Citation

M. ABID Tahar, (2011), "Effect of Preaging and maturing on the Hradening Precipitation of AlMgSi Alloy", [national] Metals : Advances in Reeearch and application , 2011 Edition , ScholarlyEditions lien :https://www.scholarlyeditions.com/ScholarlyEditions/

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2010

Pre-Aging and Maturing Effects on the Precipitation Hardening of an Al-Mg-Si Alloy

The effect of pre-aging and maturing at room temperature on the hardening response of an Al-Mg-Si alloy is investigated using differential scanning calorimetry (DSC), hardness measurements (Hv) and scanning electron microscopy (SEM).Two experimental conditions are examined. First, natural aging for different times (3 weeks and 1 month) followed by artificial aging at 180°C as a function of time. Second, pre-aging at temperatures in the range 75-100°C followed by artificial aging at 180°C after natural aging for the same periods. The present results indicate that the effect of the pre-aging just after the heating and quenching is used in order to correct the undesirable effect of aging at room temperature. However, during the artificial aging, the alloy hardening becomes faster. Aged samples which have already undergone pre-aging and maturing reveal the precipitation of ''phase. This later phase has the highest hardness value.
Citation

M. ABID Tahar, (2010), "Pre-Aging and Maturing Effects on the Precipitation Hardening of an Al-Mg-Si Alloy", [national] Defect and Diffusion Forum , Scientific.Net

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Effect of preaging and maturing on the hardening precipitation of an Al–Mg-Si alloy.

The effect of pre-aging and maturing at room temperature on hardening response of an Al–Mg–Si alloy
is investigated using differential scanning calorimetry (DSC), hardness measurements (Hv) and scanning
electron microscopy (SEM). Two experimental conditions are examined. First, natural aging for different
times (3 weeks and 1 month) followed by artificial aging at 180 ◦C as function time. Second, pre-aging at
temperatures in the range 75–100 ◦C followed by artificial aging at 180 ◦C after natural aging for the same
periods. The present results indicate that the effect of the pre-aging just after the heating and quenching is
used in order to correct the undesirable effect of aging at room temperature. However, during the artificial
aging, the alloy hardening becomes faster. Aged samples which have already undergone pre-aging and
maturing reveal the better hardening response.
Citation

M. ABID Tahar, (2010), "Effect of preaging and maturing on the hardening precipitation of an Al–Mg-Si alloy.", [national] Journal of Alloys and Compounds , ELSEVIER

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