Abdelhalim Loucif

Abdelhalim Loucif

École de Technologie Supérieure

H-index: 8

North America-Canada

Abdelhalim Loucif Information

University

École de Technologie Supérieure

Position

Department of Mechanical Engineering (ÉTS) de Montréal

Citations(all)

174

Citations(since 2020)

118

Cited By

103

hIndex(all)

8

hIndex(since 2020)

6

i10Index(all)

7

i10Index(since 2020)

5

Email

University Profile Page

École de Technologie Supérieure

Abdelhalim Loucif Skills & Research Interests

oxidation

solidification

macrosegregation

failure analysis

steels

Top articles of Abdelhalim Loucif

Influence of Hot Top Geometry on the Solidification Time and Macrosegregation in Large-Size Cast Ingot Using Finite Element Modeling

The effect of the hot top geometry variations on the solidification time and macrosegregation formation during the solidification of a 12MT cast ingot made of a Cr-Mo-low alloy steel was investigated. The bottom pouring ingot casting of a 12 MT cast ingot was simulated by the three-dimensional finite element modeling code THERCAST®. The accuracy of the model was validated by experimental results of the macrosegregation map of a real ingot. The influence of the hot top geometry including an increase and a decrease in hot top height on the solidification parameters was determined. The results showed an increase of 27.5% and a decrease of 5% in the solidification time by an increase of 165mm and a decrease of 200mm in hot top height respectively. The new hot top geometries revealed variations in the range of macrosegregation (comprising the maximum and minimum values of macrosegregation) in …

Authors

Neda Ghodrati,Abdelhalim Loucif,Jean-Benoit Morin,Henri Champliaud,Mohammad Jahazi

Published Date

2023/8/21

Microstructural damage during electrical discharge machining of a high silicon aluminum alloy for space applications

Aluminum alloys with 40 to 50 wt.% silicon content are potential material candidates for the manufacturing of satellite components. These materials have excellent thermal and mechanical stabilities, but machining complex components from these alloys is facing many challenges. The present study was performed on an aluminum-high silicon alloy (50–50 wt.%) with the main aim of investigating the evolution of the microstructure with particular attention to surface and subsurface damage as a result of Electrical Discharge Machining (EDM). For this purpose, the microstructure was characterized by optical and Scanning Electron Microscopes (SEM) as well as Energy Dispersive Spectroscopy (EDS) of the machined samples. The results show the existence of melted and re-solidified zone with much finer silicon particles located in a zone on the top of the machined surface where cracks were also observed. Moreover …

Authors

Frédéric Bédard,Abdelhalim Loucif,Mohammad Jahazi,Victor Songmene

Journal

The International Journal of Advanced Manufacturing Technology

Published Date

2023/9

Experimental and numerical analyses of residual stress redistributions in large steel dies: Influence of tempering cycles and rough milling

The aim of the present research was to study the residual stress variations induced by heat treatment and rough milling operations of large forged steel blocks. The heat treatment process includes quenching and tempering operations. An efficient strategy based on a size sensitivity analysis (SSA) was proposed to reach the actual values of residual stresses in large-size steel blocks by using small-size workpieces in laboratory scale without damaging the blocks. The residual stresses were measured and compared after the first and second tempering and the rough milling. A 3D finite element (FE) model was developed to predict superficial residual stresses and was then calibrated experimentally. The results showed that the residual stresses after the first and second tempering were highly compressive on and near the surface. In addition, the resultants of the residual stresses after double tempering processes were …

Authors

Morteza Sadeghifar,Mahshad Javidikia,Abdelhalim Loucif,Mohammad Jahazi,Victor Songmene

Journal

journal of materials research and technology

Published Date

2023/5/1

Influence of Spacers and Skid Sizes on Heat Treatment of Large Forgings within an Industrial Electric Furnace

The influence of stacking patterns, through the different spacer and skid sizes, on the transient temperature distribution uniformity of large-size forgings in a 112-m3 electrical heat treatment furnace was investigated by conducting CFD simulations and real-scale experimental validation. A 3D CFD model of the electrical furnace was generated, including a heat-treating chamber, axial flow fans, large size blocks, skids, and spacers. Real-scale temperature measurements on instrumented test blocks during the heat treatment process were carried out to validate the CFD simulations. Results indicated that the CFD model was capable enough to determine the transient temperature evolution of the blocks with a maximum average deviation of about 6.62% compared to the experimental measurements. It was found that significant temperature non-uniformities of up to 379 K on the surfaces of the blocks due to the non-optimum stacking pattern were experienced by the blocks. Such non-uniformities could be reduced between 24% to 32% if well-adapted spacer and skid sizes were used in the stacking configurations. Based on simulation results and experimental validation work, optimum spacer and skid sizes for uniform temperature distribution were proposed for different stacking patterns.

Authors

Sajad Mirzaei,Nima Bohlooli Arkhazloo,Farzad Bazdidi-Tehrani,Jean-Benoit Morin,Abdelhalim Loucif,Mohammad Jahazi

Journal

Energies

Published Date

2023/3/23

Void closure during open die forging of large size martensitic stainless-steel ingots: an experimental-analytical-numerical study

In the present research, void closure during the open die forging process of large size AISI410 martensitic stainless-steel ingots was studied using a combination of analytical modeling, finite element simulations, and experimental validations. The analytical model assumes that the voids during deformation can be represented by initially spherical geometry changing to ellipsoid or cracks before being completely closed. Finite element simulations of the open die forging were conducted using the Forge® NxT 3.1 software to simulate the stresses and strains predicted by the analytical model. Hot forging experiments were conducted on large size cylindrical samples at the center of which spherical voids simulating the presence of porosity, were machined. After hot forging, the closure levels of the voids were compared with those predicted by the model and very good agreement (discrepancy in the range of 7%) was …

Authors

Antoine Geisler,Morteza Sadeghifar,Jean-Benoit Morin,Abdelhalim Loucif,Mohammad Jahazi

Journal

International Journal of Material Forming

Published Date

2023/1

Influence of hot top height on macrosegregation and material yield in a large-size cast steel ingot using modeling and experimental validation

The effect of the hot top height on the formation of positive and negative macrosegregation patterns, the ingot quality, and the material yield during solidification of a 12 MT cast ingot made of a Cr-Mo-low alloy steel was investigated. A 3D numerical simulation of the process was conducted using finite element modeling. A full-size 12 MT ingot was cut off from its center in the longitudinal direction, and a large cross-section was sliced into small samples. The chemical mapping of all the elements in the steel composition was obtained for all samples and compared with the model predictions for validation purposes. The influence of the increase in hot top height on the liquid metal velocity field, size and shape of vortexes, cooling rate of the liquid, and liquidus temperature was determined. Results revealed that increasing the hot top height by 165 mm increased the solidification time, fluid velocity in regions including the hot top and ingot bottom, and decreased the local liquidus temperature. The combination of all the above resulted in an overall decrease in positive and negative macrosegregation of more than 6% and an increase in ingot quality. The results are interpreted based on the interactions between the transport of solute and heat coupled with the flow driven by thermo-solutal convection and shrinkage-induced flow.

Authors

Neda Ghodrati,Mounir Baiteche,Abdelhalim Loucif,Paloma Isabel Gallego,Morin Jean-Benoit,Mohammad Jahazi

Journal

Metals

Published Date

2022/11/7

Modeling of the Influence of Hot Top Design on Microporosity and Shrinkage Cavity in Large-Size Cast Steel Ingots

The effect of the variations in different hot top designs on the risk of microporosity and shrinkage cavity formation during solidification of a 12MT cast ingot made of a Cr-Mo-low-alloy steel was investigated. Three-dimensional finite element modeling code THERCAST® was used to simulate the thermomechanical phenomena associated with the various phases of mold filling and cooling in and out of the mold in the solidification process. Prediction results were validated by comparison between the simulation results and experimental measurement of chemical composition in different locations of the ingot and depth of shrinkage cavity. The influence of the increase in the hot top height, increase in both the hot top height and sideboard, and insert of sideboard on solidification time, liquid fraction, molten metal pool dimensions, and liquid feeding were determined. Results revealed that variation in the hot top geometry and hot top insulation increased the solidification time, changed the height and width of the molten metal pool, and modified the solidification behavior. The simulation results also showed that the centerline shrinkage porosity, as well as microporosity throughout the ingot volume, could be reduced by changes in the hot top design.

Authors

Neda Ghodrati,Abdelhalim Loucif,Jean-Benoit Morin,Mohammad Jahazi

Published Date

2022

FEM Simulation of the Effect of Mold Initial Temperature on Carbon Macrosegregation in Large-Size Steel Ingots

The impact of initial mold temperatures on the formation of macrosegregated zone during the solidification process of large size steel ingots was numerically investigated. Three initial mold temperatures, representing the most commonly encountered industrial conditions, were examined. The flows induced by pouring jet, the thermo-solutal convection, and the thermomechanical deformation of the phases were all taken into consideration. The results indicated that a higher mold temperature increased the macrosegregation intensity in the upper section of the casting, along the centerline and in the mid-radius solute-enriched bands. The increase was associated with the increased temperature gradient in the casting, the advance predominance of thermal convection, and the delayed solidification process.

Authors

Chunping Zhang,Abdelhalim Loucif,Mohammad Jahazi,Jean Benoit Morin

Journal

Materials Science Forum

Published Date

2022/3/17

A FEM Analysis on the Influence of Manganese on Carbon and Chromium Macrosegregation in Large Size Steel Ingot

In this study, 3D numerical simulations were performed to study the effect of Mn on the macrosegregation behaviors of carbon and chromium in a 40 MT steel ingot using Finite Element Modeling (FEM). Two Mn contents of 0 and 5 wt.% were investigated. Thermophysical properties such as specific heat, density and phase fractions were determined using thermodynamic software Thermo-Calc®. Simulation results indicated that higher Mn content increases the carbon macrosegregation while it tends to lower the one of chromium. Moreover, it changes the solute poor band into rich one in the case of chromium and no bands were obtained for carbon. These results are analyzed in terms of the changes of thermophysical properties, interactions between alloying elements and the change in the primary solidification mode from δ-ferrite to austenite resulting from the increase of Mn concentration.

Authors

Abdelhalim Loucif,Chunping Zhang,Jean Benoit Morin,Mohammad Jahazi

Journal

Materials Science Forum

Published Date

2022/3/17

FE Modelling and Prediction of Macrosegregation Patterns in Large Size Steel Ingots: Influence of Filling Rate

In the present work, the influence of filling rate on macrosegregation in a 40-Metric Ton (MT) ingot of a high-strength low-carbon steel was studied using finite element (FE) simulation. The modelling of the filling and solidification processes were realized with a two-phase (liquid-solid) multiscale 3D model. The liquid flow induced by the pouring jet, the thermosolutal convection, and the thermomechanical deformation of the solid phase were taken into consideration. Two filling rates were examined, representing the upper and lower manufacturing limits for casting of large size ingots made of high strength steels for applications in energy and transportation industries. The evolution of solute transport, as well as its associated phenomena throughout the filling and cooling stages, were also investigated. It was found that increasing the filling rate reduced macrosegregation intensity in the upper section, along the centerline and in the mid-radius regions of the ingot. The results were analyzed in the framework of heat and mass transfer theories, liquid flow dynamics, and macrosegregation formation mechanisms.

Authors

Chunping Zhang,Abdelhalim Loucif,Mohammad Jahazi,Jean-Benoit Morin

Journal

Metals

Published Date

2021/12/24

Subsurface crack initiation and propagation in an open dieforged high strength steel: A microstructural analysis

This paper presents an experimental investigation with the objective to determine the root causes for the cracking of a large size bar made of a medium carbon low alloy steel after open die forging and heat treatments operations. The cracks were observed below the surface during the machining step. In order to understand the mechanisms of crack initiation and propagation, micro-CT tomography and scanning electron microscope (SEM) were employed. Microstructural damage analysis revealed oxidation of different alloying elements, more specifically manganese, chromium and silicon. The presence of defects in the form of cavities and porosities were also observed at the grain boundaries. Some of the above defects were observed along the crack path, while others were on both sides of the cracks without any connection to them and finally, a third group completely isolated from any crack. The characteristics of …

Authors

Abdelhalim Loucif,Jean Benoit Morin,Louis Philippe Lapierre-Boire,Mohammad Jahazi

Journal

Key Engineering Materials

Published Date

2021/4/26

Macrosegregation characteristics of ferrite and austenite stabilizer elements in large size high strength steel ingot

In the present work, the segregation degrees of ferrite and austenite stabilizer alloying elements were analyzed for a high strength steel. For this, samples were taken from the surface and center of the hot-top and the upper section of a 40 MT ingot. The results showed that the positive segregation ratios for all the investigated elements were higher in the ingot center than in the surface with higher values for austenite stabilizer elements. The increase of austenite alloying element stabilizers was accompanied by the change in the primary solidification mode of the austenite phase. The obtained results are in good agreement with the observed presence of austenite, revealed by X-ray diffraction analysis, stabilized by the austenite alloying elements.

Authors

Abdelhalim Loucif,Chunping Zhang,Mohammad Jahazi,Louis Philippe Lapierre-Boire

Published Date

2020

Abdelhalim Loucif FAQs

What is Abdelhalim Loucif's h-index at École de Technologie Supérieure?

The h-index of Abdelhalim Loucif has been 6 since 2020 and 8 in total.

What are Abdelhalim Loucif's top articles?

The articles with the titles of

Influence of Hot Top Geometry on the Solidification Time and Macrosegregation in Large-Size Cast Ingot Using Finite Element Modeling

Microstructural damage during electrical discharge machining of a high silicon aluminum alloy for space applications

Experimental and numerical analyses of residual stress redistributions in large steel dies: Influence of tempering cycles and rough milling

Influence of Spacers and Skid Sizes on Heat Treatment of Large Forgings within an Industrial Electric Furnace

Void closure during open die forging of large size martensitic stainless-steel ingots: an experimental-analytical-numerical study

Influence of hot top height on macrosegregation and material yield in a large-size cast steel ingot using modeling and experimental validation

Modeling of the Influence of Hot Top Design on Microporosity and Shrinkage Cavity in Large-Size Cast Steel Ingots

FEM Simulation of the Effect of Mold Initial Temperature on Carbon Macrosegregation in Large-Size Steel Ingots

...

are the top articles of Abdelhalim Loucif at École de Technologie Supérieure.

What are Abdelhalim Loucif's research interests?

The research interests of Abdelhalim Loucif are: oxidation, solidification, macrosegregation, failure analysis, steels

What is Abdelhalim Loucif's total number of citations?

Abdelhalim Loucif has 174 citations in total.

What are the co-authors of Abdelhalim Loucif?

The co-authors of Abdelhalim Loucif are Henri Champliaud.

    Co-Authors

    H-index: 18
    Henri Champliaud

    Henri Champliaud

    École de Technologie Supérieure

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