Mousa Javidani

• PhD
• Professor (Associate) at Université du Québec à Chicoutimi

To ensure reliable power transmission, maintaining high thermal stability in aluminum conductor cables is essential, as strength degradation may occur due to the increased temperature of overhead cables during service. This study examined the strength degradation of an ultrafine-grained hypoeutectic Al-Si alloy by investigating its microstructural...

Hypoeutectic Al-Si alloys are promising candidates for novel Al conductor cables; however, their limited electrical conductivity (EC) and mechanical strength hinder their widespread industrial applications. This study investigates the influence of two thermomechanical processing routes-conventional (C-TMP) and modified (M-TMP)-on the microstructura...

This study investigated the effect of pre-friction surfacing heat treatment of consumable rods and heat input during friction surfacing on the microstructure, mechanical properties, and wear resistance of hypereutectic Al-Si alloy deposited on a commercially pure aluminum substrate. The results show that regardless of the consumable rod’s heat trea...

The activation of restoration mechanisms, such as dynamic recrystallization (DRX), through hot deformation results in effective grain refinement and microstructure optimization in Ni-based superalloys. This study analyzed the appropriate hot-working parameters, DRX behavior, and microstructural evolution of a Nimonic 901 precipitation-hardened supe...

This paper comprehensively examines three structural steel grades' microstructural features and mechanical properties, evaluating their suitability for shipbuilding applications. The steels analyzed include quench and tempered (Q and T) steel, thermomechanical controlled processed (TMCP) steel, and hot rolled (HR) steel. A microstructural character...

This study explores the multifaceted challenges in fabricating polar icebreakers, particularly in light of the escalating effects of global warming on the Arctic region. As Arctic ice melts, a shorter trade route between Asia and Europe emerges, highlighting the need for efficient polar-class vessels. However, the harsh conditions posed by extremel...

This study examines the microstructural and mechanical properties of A390 aluminum alloys treated with fast multiple rotation rolling (FMRR), focusing on the effects of solid solution treatment and heat input on the morphology of Si particles, grain structure, and precipitate behavior. Optical microscopy reveals varying morphologies of primary and...

This study investigates the impact of multi-step austenitization heat treatment on the in-service life of modified AISI A8 cold work tool steel knives used in wood cutting. The knives were subjected to two treatment methods: single quenching and double tempering (SQDT) and double quenching and double tempering (DQDT). Both treatments were followed...

Hydrogen embrittlement remains a crucial concern in industries that rely on high-strength materials. Exposure to hydrogen poses a significant threat to the mechanical integrity of such materials. This review article briefly discusses the fundamentals of hydrogen embrittlement, including its mechanisms and the effects of various factors, such as che...

In this study, the friction surfaced Al–Si–Cu alloy coating was processed using a low rotational speed, fast multiple rotation rolling (FMRR) process. The effect of traverse speed in the range of 50–200 mm/min at a rotational speed of 600 rpm on the microstructure, mechanical properties, and wear resistance of the Al–Si–Cu alloy coating was investi...

This review paper thoroughly investigates the challenges associated with constructing polar icebreakers, given the increasing feasibility of Arctic navigation attributed to global warming. The strategic significance of the Northern Sea Route in global trade, potentially reducing the Asia-Europe transit distance by about one-third, underscores the g...

Herein, the effect of high rotational speed fast multiple rotations rolling (FMRR) on the microstructure, mechanical properties, and wear resistance of an Al–Si–Cu alloy coating friction surfaced on AA1050 aluminum alloy is investigated. The FMRR process is performed at a rotational speed of 3000 rpm with traverse speeds of 50, 80, 110, and 140 mm...

Hypoeutectic Al-Si alloys are increasingly recognized as promising materials for aluminum conductor cables owing to their remarkable combination of high strength and castability. However, the widespread industrial application of these alloys is limited by their moderate electrical conductivities (ECs). In this study, we explored the effects of dire...

In this study, the welding performance of three filler wires, ER4043, ER5356, and the newly developed FMg0.6, were systematically investigated in the gas metal arc welding of high-strength AA6011-T6 plates. An extensive analysis of the microstructural evolution, mechanical properties, fatigue resistance, and corrosion behavior of different weldment...

This study explores the potential of aluminum wine bottles as a sustainable alternative to traditional glass bottles, emphasizing their recyclability and environmental advantages. It reviews the potential use of Al-Mn-Mg 3xxx alloys in beverage can bodies and examines various applications of aluminum containers in packaging, including recyclable be...

A comprehensive investigation, encompassing microstructural analysis of the subsurface and bulk regions, along with tensile testing near the solidus temperature in the range of 520–580 °C and with two strain rates (10–4 and 10–3 s⁻¹), was conducted on two AA5182 alloy ingots (A and B) cast at casting speeds of 60 and 75 mm ∙\documentclass[12pt]{min...

In this study, friction stir welding (FSW) was employed to join AA3003-H18 sheets by incorporating in situ Al-Cu intermetallic compounds within the stir zone. The FSW process was carried out under three distinct conditions: (I) without applying powder, (II) by introducing Cu powder, and (III) by incorporating Cu-Al mixed powder (50 vol.% Cu, 50 vol...

In the realm of industries focused on tribology, such as the machining industry, among others, the primary objective has been tribological performance enhancement, given its substantial impact on production cost. Amid the variety of tribological enhancement techniques, cathodic arc evaporation physical vapour deposition (CAE-PVD) coatings have emer...

Welding high-strength 6xxx aluminum alloys using a commercial ER4043 filler often results in inferior joint strength. This study investigated the effects of newly developed Al-Si-Mg filler metals with varying Mg (0.6–1.4 wt.%) and Mn (0.25–0.5 wt.%) contents on the microstructure evolution and mechanical performance of high-strength AA6011-T6 plate...

In this study, we investigated the impact of ageing heat treatment following friction surfacing of a solid solution-treated Al-16Si alloy on coating geometry, microstructure, and wear resistance. We employed a simulation using the smoothed-particle hydrodynamics (SPH) method alongside experimental analysis. The simulation results revealed that as t...

This study investigates the effect of nickel-aluminide on Al-Cu-Mg alloys’ non-isothermal aging behavior. The microstructure, mechanical properties, and corrosion resistance of nickel-aluminide-containing Al-Cu-Mg alloys were evaluated after non-isothermal aging treatment. The results show that the presence of nickel aluminide in the Al-Cu-Mg alloy...

In this study, the friction surfacing of Al–16Si alloy on AA1050 substrate was investigated using experimental and smoothed-particle hydrodynamics simulation methods. The effect of Al–16Si rod rotational speed on microstructure, surface roughness, mechanical properties, and wear resistance of coatings was examined. Both experiment and simulation fi...

The electrical conductivity (EC), mechanical strength, hot tearing susceptibility (HTS), and related microstructure of Al–xNi–0.55Mg–0.55Si conductor alloys (x = 1–4 wt%) are investigated. Adding Mg and Si into Al–Ni‐based alloys, numerous β″/β′ precipitate after T5 and T6 treatments, thus significantly improving the EC and mechanical strength. The...

Welding of aluminum alloys is a crucial manufacturing process to assemble and integrate the parts and components in transportation industry and aerospace sector. The commercial 4xxx filler wires provide aluminum joints with relatively low strength. To improve the strength of aluminum joints, it is required to develop new welding filler wires. In th...

The impact of Mn content (0.1-1 wt.%) on the hot workability and processing maps of Al-Mg-Mn 5xx alloys was investigated. Hot compression tests were carried out in the temperature range of 350-500 °C and strain rate range of 0.001-1 s−1. The processing maps were developed using dynamic material modeling, through which instability regions and safe d...

This study investigated the effects of annealing on the microstructure, mechanical properties, and electrical conductivity (EC) of AA4043 rods produced through the Properzi CCR process. Annealing was conducted at two temperatures (200 °C and 300 °C) for 4 h. Characterization techniques were performed on the rod samples, including optical microscopy...

In the present work, the influences of non-isothermal aging (NIA) and isothermal aging (T6 treatment) on mechanical properties and corrosion resistance of nickel-aluminide reinforced Al-Cu-Mg aluminum alloy composite cladding have been investigated. The claddings were performed using the AA2024 mechtrod by friction surfacing process. Results show t...

In this study, the effect of heat input in friction surfacing on coating geometry, topology, microstructure, and wear resistance was investigated using numerical and experimental methods. Numerical results were obtained from smoothed-particle hydrodynamics and finite element models, which were calibrated using experimental data. The results demonst...

The stochastic nature of tool wear during wood machining, owing to the dynamic properties of the biological material and its dependence on various factors, has raised significant industrial and research concerns in recent years. Explicitly, the tool wear is a product of the interaction between wood properties (such as hardness, density, and contami...

The impact of traverse speed on the microstructure, mechanical properties, and wear resistance of Al–16Si alloy friction-surfaced on AA1050 alloy was evaluated using smoothed-particle hydrodynamics (SPH) simulation and experimental techniques. Results revealed a 54% and 20% decrease in the height and width of the coating, respectively, as traverse...

Al-Si-Mg 4xxx filler metals are widely used in aluminum welding owing to their excellent weldability and capability for strength enhancement by heat treatment. However, weld joints with commercial Al-Si ER4043 fillers often exhibit poor strength and fatigue properties. In this study, two novel fillers were designed and prepared by increasing the Mg...

Friction stir welding (FSW) is an effective solid-state joining process that has the potential to overcome common problems correlated with conventional fusion welding processes. FSW is used for the joining of metallic materials, in particular Al alloys (non-heat-treatable and heat-treatable). The heat produced by the friction between the rotating t...

The elastic properties of the Al-Mg-Si direct-chill-cast AA6111 alloy were determined during the unloading stage of the cyclic tensile test over a wide range of temperatures (25-550°C), and particular attention was paid to high temperatures near the solidus. YoungÕs modulus was calculated based on macroscopic and localized strains, which were measu...

The effect of multipass friction stir processing (FSP) on the microstructure and mechanical properties of an AlSi10Mg alloy produced by laser-powder bed fusion was investigated. FSP was performed at a rotational speed of 950 rpm and traverse speed of 85 mm/min. The results indicated that FSP destroyed the coarse grain structure in the as-built AlSi...

The source of surface blister defect in 6xxx series Al rolled products was studied. A blister defect, aligned with the rolling direction, was observed on the surface of the AA6xxx Al rolled sheets. It was indicated that the porosities and small microstructural inhomogeneities inside the cast ingots, identified by ultrasonic tests and metallography...

A new strategy is proposed to modify the grain structure and crystallographic texture of laser-powder bed fusion AlSi10Mg alloy using multi-pass friction stir processing (FSP). Accordingly, 1–3 passes of FSP with 100% overlap were performed. Scanning electron microscopy and electron backscattered diffraction were used for microstructural characteri...

The impact of graphene-TiO2 nanohybrid reinforcement on an aluminum matrix after the laser powder bed fusion process was investigated. The microstructure characteristics, mechanical properties, wear resistance, and corrosion behavior of the fabricated nanocomposite structures with different contents of the graphene-TiO2 nanohybrid were compared wit...

In this study, a novel approach for residual stress (RS) distribution on forged AA7175 is considered to replace and simplify the manufacturing process, based on the lean manufacturing concept. AA7175 alloy is a quench-sensitive material applied in the aeronautics industry, which is subjected to vibration and cyclic loads leading to fatigue failure....

The semisolid tensile properties of two AA6111 direct-chill cast alloys (A and B) have been studied. The Cu, Mn, and Si contents of alloy A are higher than those of alloy B. The microstructures of the alloys were analyzed before tensile testing and after tensile fracture. Isothermal holding was performed in the temperatures of 510, 520, 535, 552, 5...

Thin gauge Al-based products for automotive and packaging applications are highly sensitive to surface (e.g., pinholes) and tearing defects during cold rolling. The root cause of these defects can be correlated with various process parameters such as casting defects (e.g., inclusions, oxides, etc.) and/or downstream rolling process (e.g., roughness...

The 4xxx series of aluminum fillers are extensively used in aluminum welding owing to their excellent weldability, high cracking resistance, and low melting point. However, joints welded with commercial AA4043 fillers experience low mechanical strength. Therefore, we investigated the performance and mechanical strength of joints welded using newly...

The hot deformation behaviors of Al–Mg–Mn 5xxx alloys with different Mn contents (0.1–1 wt.%) were studied by carrying out uniaxial compression tests over the temperature and strain rate ranges of 350–500 °C and 0.001–1.0 s⁻¹, respectively. In the pre-deformed state, Mn dispersoids appeared in the α-Al matrix once the Mn content reached 0.4%. The d...

The effect of adding Ag and Cu on the strength and electrical conductivity of Al-Mg-Si conductor alloys was investigated using conventional and modified thermomechanical treatments. In the conventional thermomechanical treatment, the addition of Ag and Cu moderately increased the strength from 296 MPa to 305-316 MPa above the minimum required elect...

AISI-D6 steel is widely used in the creation of dies and molds. In the present paper, first the electrical discharge machining (EDM) of the aforementioned material is performed with a testing plan of 32 trials. Then, artificial neural networks (ANN) and adaptive neuro-fuzzy inference system (ANFIS) were applied to predict the outputs. The effects o...

The mechanical strength and electrical conductivity (EC) in Al–Mg–Si 6xxx conductor alloys are key characteristics but mutually exclusive properties. This review paper critically elaborates the methods to enhance the mechanical strength and electrical conductivity. These methods include an optimization of the main alloying elements (Mg and Si), the...

In this study, fuzzy logic neural networks were employed to optimize the friction stir welding (FSW) process parameters in the joining of copper plates. The FSW parameters were considered as the input variables, for which micro-hardness, nano-hardness, and yield strength of the joints were the responses. The micro-hardness and nano-hardness were me...

The crystallographic orientation relationship between α and β phases during the non-equilibrium heat treatment of a Cu-37 wt. % Zn alloy was investigated. With this aim, Cu-37 wt. % Zn alloy plates with a thickness of 2 mm were heated at 810 °C for 1 h and then were quenched in water. The microstructure and texture of heat-treated samples were anal...

The possibility of underwater dissimilar friction stir welding of AA6061 and AA7075 aluminum alloy was explored to overcome the problem of hardness loss in different microstructural zones. Optical microscopy and electron backscattered diffraction were employed to characterize the microstructure of the joint. Vickers hardness measurements were condu...

The goal of this study is to investigate the effects of copper and aluminum atom doping on the microstructure, composition, optical, and photocatalytic characteristics of titanium dioxide (TiO2) films produced using the sol-gel method. The structural, morphological, optical, and photocatalytic properties of the films were thoroughly studied using X...

The productivity and recovery of hot-rolled Al-Mg-Mn sheets often suffer from sodium-induced edge cracking. In this study, AA5182 ingots with different levels of Na were prepared by direct-chill (DC) casting, and were then subsequently subjected to homogenisation and hot-rolling processes. The edge crack occurrence during hot rolling in the pass #1...

The effects of natural aging (NA), and its combination with pre-aging (PA), on the strength and electrical conductivity (EC) of drawn Al–Mg–Si AA6201 conductor alloys were studied. Natural aging had a negative impact on precipitation before the drawing process. However, wire drawing counteracted the detrimental influence of natural aging on precipi...

Accurate determination of the materials’ strength and ductility in the semi-solid state at near-solidus temperatures is essential, but it remains a challenging task. This study aimed to develop a new method to determine the stress-strain evolution in the semi-solid state of aluminum alloys within the Gleeble 3800 unit. Stress evolution was determin...

The effects of the Mg/Si ratio and aging treatment on the strength and electrical conductivity of Al–Mg–Si 6201 conductor alloys were investigated. Four experimental alloys with different Mg/Si ratios of 2, 1.5, 1, and 0.86 and with a constant Mg level of 0.65 wt% were prepared. It was revealed that excessive Si (a low Mg/Si ratio) increased the pe...

The impact of Si levels on electrical conductivity (EC) and hardness in Al-Mg-Si 6xxx aluminum conductor alloys was studied at different aging times. Three experimental alloys with the Si levels of 0.4, 0.66, 0.89 wt.% containing a constant Mg content of 0.65 wt.%, designated as Si4, Si6, and Si9, were selected. It is found that the average peak ha...

This paper aims to study the manufacturing of the AlSi10Mg alloy with direct energy deposition (DED) process. Following fabrication, the macro- and microstructural evolution of the as-processed specimens was initially investigated using optical microscopy and scanning electron microscopy. Columnar dendritic structure was the dominant solidification...

Evolutions of the Cu/Mg bearing intermetallics were thoroughly investigated in four Al-Si hypoeutectic alloys containing various Cu (1 and 1.6 wt pct) and Mg (0.4 and 0.8 wt pct) contents. The area fractions of Cu/Mg bearing phases before and after solution heat treatment (SHT) were quantified to evaluate the solubility/stability of the phases. Two...

Post-eutectic reactions occurring in Al-Si hypoeutectic alloys containing different proportions of Cu, Mg, and Fe were thoroughly investigated in the current study. As-cast microstructures were initially studied by optical and electron microscopy to investigate the microconstituents of each alloy. Differential scanning calorimetry (DSC) was then us...

The determination of the solidification characteristics of alloys using differential scanning calorimetry (DSC) is difficult because of the unknowns associated with the kinetic of phase transformations and the thermal resistance between the sample and the temperature measuring device. This paper shows how appropriate assumptions coupled with a ther...

In this paper, the influence of Cu, Mg and Fe content on the microstructure evolution of Al-Si based alloys has been studied. Initially, the as-cast microstructure of four Al-Si alloys containing different Cu, Mg and Fe content was studied using differential scanning calorimetry (DSC), optical and electron microscopy. Subsequently, the effect of di...

Excellent thermal conductivity and lower density make Al–Si alloys a suitable alternative for cast iron in the fabrication of engine components. The increase in the maximum operation temperature and pressure of engines necessitates improving the thermomechanical fatigue performance of Al–Si alloys. This paper has two major parts focussing on the us...

Abstract Thermodynamic simulations based on the CALPHAD method have been carried out to assess the phase formation in Al–7Si–(0–1)Ni–0.5Cu–0.35Mg alloys (in wt.%) under equilibrium and non-equilibrium (Scheil cooling) conditions. Calculations showed that the T-Al 9 FeNi, c-Al 7 Cu 4 Ni, d-Al 3 CuNi and e-Al 3 Ni phases are formed at different Ni le...

Direct quenching and tempering (DQ-T) of hot rolled steel section has been widely used in steel mill for the sake of improvement of mechanical properties and energy saving. Temperature history and microstructural evolution during hot rolling plays a major role in the properties of direct quenched and tempered products. The mathematical and physical...