Abbas Honarbakhsh-Raouf

Abbas Honarbakhsh-Raouf
Semnan University · Faculty of Metallurgical and Materials Engineering

PhD

About

86
Publications
20,865
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1,234
Citations
Additional affiliations
January 1990 - November 2016
Semnan University
Position
  • Academic staff- Professor of metallurgy
February 1989 - March 2019
Semnan University
Position
  • Professor

Publications

Publications (86)
Article
Gas-metal arc welding (GMAW) has received much attention over the last several years and has numerous wide and beneficial applications in different industries. The heat-affected zone (HAZ) is the region between the base and weld metal characterized by the lowest toughness in a welding joint. Hence, this zone is always a matter of interest for many...
Article
The procedure of gas-metal arc welding (GMAW) has received much attention in recent years and has numerous beneficial applications in the industry, including car industry and ship building. It is expected that the GMAW parameters, such as arc voltage, welding current and welding speed, strongly affect the mechanical properties of welded joints. As...
Article
In this investigation, microstructural development and mechanical properties of an automotive grade AISI 4130 steel were explored through various heat treatment routes. In that regard, first of all the effect of austenitization temperature and time on the mechanical properties were assessed. Then, an optimum austenitization temperature was obtained...
Article
This work focuses on the effect of Up-Quenching experimentation on mechanical properties of SAE 4130 steel. In that sense, the effect of time and temperature of Up-quenching on hardness, yield strength (YS), ultimate tensile strength (UTS), elongation, and toughness of this automotive steel were investigated. Up-quenching of the austenitized specim...
Article
Full-text available
A new technique was used to improve the properties of 5083 aluminium weldments using nano-Al2O3. The single-pass welded metals were made using gas tungsten arc welding by fillers containing different amounts of nano-Al2O3 particles fabricated using friction stir processing (FSP). To achieve a uniform distribution of nano-Al2O3 particles, FSP was ap...
Article
Low-carbon steel St37-2 is widely used in the bus-production industry. The gas-metal arc welding (GMAW) is strongly applied to join steel components due to its ease and low cost. Heat-affected zone (HAZ) is the area between the weld and the base metal, where the welded joint may have the lowest toughness and, hence, it has always been a matter of i...
Article
The procedure of gas-metal arc welding (GMAW) has received much attention in recent years and has numerous beneficial applications in the industry. The arc voltage, welding current and welding speed are three independent variables of this process that may affect the mechanical properties of the weld metal. As one of the most important mechanical pr...
Article
Welding fillers containing various amounts of 30 nm nano-Al2O3 particles were fabricated using friction stir processing and used to improve the mechanical properties of the welding zone. Single-pass welding was made using gas tungsten arc welding. To achieve a uniform distribution of the nanoparticles, friction stir processing was applied to the we...
Article
(1-x)Bi2Fe4O9 - xCoFe2O4 (0.0≤ x ≤1.0) multiferroic nanocomposites were prepared by wet chemical procedures combining reverse chemical co-precipitation and Pechini-type sol–gel techniques followed by mechanical blending process. The XRD and SAED results showed that the diffraction patterns are perfectly indexed to the constituent phases present in...
Article
The effects of 0.5, 1, 2 and 4 wt% Gd additions on the microstructural evolution and high-temperature mechanical properties of a cast Al–15Mg2Si in situ composite were investigated by shear punch testing (SPT) in the temperature range of 298–563 K. The microstructural studies indicated that Gd addition changes the irregular morphology of the primar...
Article
Full-text available
Friction welding is widespread used in various industries nowadays. In the friction welding, heat is generated by conversion of mechanical energy into thermal energy at the interface of the work pieces during rotation under pressure. A three-dimensional thermo mechanical simulation of friction stir welding (FSW) processes is carried out for Alumini...
Article
Full-text available
In this work, the effect of urea-to-nitrate molar ratio on the synthesis and properties of Mn0.5Zn0.5Fe2O4 ferrite prepared by microwave-induced combustion method has been studied. The product powders synthesized at three different molar ratios of urea to nitrate (U/N ratio), varying from 0.58 to 1.08. X-ray diffraction patterns confirm formation o...
Article
The aim of this research was to investigate the influence of modified lignin by ionic liquid on physical and mechanical properties of plywood panels bonded with UF resin. For this purpose, Soda bagasse lignin was modified by 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]) ionic liquid and then the various content of unmodified and modified lignin...
Article
The microstructural evolution and creep behavior of a cast Al−15 wt% Mg2Si in situ composite was investigated by compression testing. The tests were carried out under applied stresses in the range 25–250 MPa, corresponding to 0.002 ≤ σ/G ≤ 0.011, at temperatures in the range 473–563 K. The microstructural studies showed that the morphology of the l...
Article
Full-text available
Welded API-5L steel pipes have been extensively used in the oil industry. One of the major parameters affecting the mechanical properties is the grain size, which is altered with the joining method. In this paper microstructural evolution in the friction stir welded API 5L-X52 steel pipes has been investigated. Specimens were cut from a 2mm thick A...
Article
Full-text available
Porous magnetic ceramics have promising applications in filtering, sensor, catalyst, etc. This work concerns to the fabrication of mesoporous magnetic foam using synthesized nanopowders Singlephase cobalt ferrite nanopowders with a mean particle size of 60 nm were synthesized by modified Pechinitype sol-gel method, without pH adjustment, by calcina...
Article
Certain amount of retained austenite can increase ductility of steels because of the TRIP phenomenon during plastic deformation. One method for achieving this is partitioning of carbon into austenite to stabilize it at room temperature. The quenching and partitioning (Q;P) heat treatment leads to a microstructure consisting of martensite and stabil...
Article
Full-text available
Cobalt ferrite nanopowders with an average particle size of 50 nm were synthesized by a modified Pechini type sol–gel method. Obtained powder was subjected for fabrication of magnetic foams by using microwave and conventional sintering approaches coupled by space holder method. Carbamide was used as space holder material. Samples were characterized...
Article
Composite metal foam was produced as an advanced porous material, using gravity casting technique. Light Expanded Clay Aggregate “LECA” was used as space holder for the produced composite metal foam. The used LECA density was 0.33–0.43 g/cm3 and the volume fraction of its porosity was from 73 to 88 vol.% and aluminum A355.0 was selected as matrix i...
Article
Friction stir processing was employed for the production of Al/AlN nano-composite layers on a 6061 Al-T6 substrate. Nano-sized AlN powder was inserted in a groove in the middle length of the substrate. Defect-free layers were achieved using tool rotation and substrate advancing speeds in the range of 900–1400 rpm and 63–310 mm/s, respectively. Subs...
Article
The main purpose of this study is to investigate the effects of humidity and temperature on the properties of GFRP specimens. Tubular specimens fabricated by a filament winding machine are submerged in the studied environment and the accuracy of Fick’s law on moisture diffusion behaviour is studied. The results prove that decreasing the exposure te...
Conference Paper
The use of fiber-reinforced polymer composite materials (FRP) in various applications such as aerospace, automotive, sports equipment, and oil and gas industries has been growing in recent years. Nonetheless, the potential use of FRP pipes in harsh environmental conditions of oil and gas industry-related applications could become significantly grea...
Article
In this study, nanocrystalline Mg1−xZnxFe2O4 soft magnetic ferrites are synthesized by varying x from 0.0 to 0.6 with a step size of 0.1. A new combustion synthesis approach is taken using glycine as fuel and metal (Fe, Mg and Zn) nitrates as reactants. The effect of varying chemical composition, i.e. changing the parameter x, on the structural and...
Article
Full-text available
The present study deals with an investigation on dry sliding wear behavior of grain refined Sc-free 7042 aluminum alloy by using a pin-on-disc wear test machine. Al-5Ti-1B and Al-15Zr master alloys were used as grain refining agents. The optimum amounts of added Ti and Zr in the alloy were found to be 0.03 wt.% and 0.3 wt.%, respectively. Extrusion...
Article
Full-text available
In this work, cobalt ferrite nanopowder was synthesized by Pechini type sol-gel method based on polyesterification reaction between citric acid, ethylene glycol and benzoic acid. Single phase cobalt ferrite nanopowders including 80 nm mean particle sizes were achieved after calcination treatment at 750 ͦC for 1 hour. Obtained powder was subjected t...
Article
Full-text available
The effects of nickel addition and hot-extrusion on the microstructure and tensile properties of in situ Al–15%Mg2Si composite specimens have been investigated. Al–15%Mg2Si composite ingots were prepared by an in situ process and different amounts of nickel (0.1, 0.3, 0.5, 1.0, 3.0 and 5.0 wt% Ni) were added to the remelted composite. Optical micro...
Article
In this study, Mg–Zn ferrite with the chemical formula of Mg0.6Zn0.4Fe2O4 is synthesized through a modified combustion synthesis using glycine as fuel and metal (Mg, Zn and Fe) nitrates as reactants. The technique, known as glycine-nitrate process, involves exothermic decomposition of a viscous liquid, prepared by thermal dehydration of an aqueous...
Article
Full-text available
In this work, the synthesis of nano-crystalline molybdenum via mechanical activation and subsequent heat treatment using graphite as the reducing agent has been studied. XRD analysis showed that in a 50 hours milled sample, the first step of the reduction took place and MoO3 reduced to nano-crystalline MoO2 with a mean crystallite size of 34 nm. Th...
Thesis
Abstract In this study, zinc oxide nanoparticles was prepared by the mechanochemical using Zn5(CO3)2(OH)6 as reagent and NaCl was used as a diluent. Mechanochemical processing involves the mechanical activation of solid-state displacement reactions at low temperatures in a ball mill. Hydroxide powder and salt according to the value of X (salt mole...
Thesis
Abstract In present study nano ZnO powders were produced by solution combustion synthesis method. Zinc nitrate salts as an oxidizer and glycine, urea, and combined glycine/urea as fuel were used. Effective parameters on SCS are fuel to oxidizer ratio (F/O), fuel type, the initial concentration, hot plate temperature, heating rate, the calcination c...
Article
The effect of some alloying elements on the thermal shock resistance of low alloyed gray cast iron was investigated. Alloying of molybdenum, chromium, nickel and tin to the gray cast iron ingot with specified composition was performed to identify optimum composition of alloyed gray cast irons for the best thermal shock resistance. Tensile and therm...
Conference Paper
Full-text available
Friction stir welding (FSW) is a solid-state joining, in which heat is generated by friction between tool and work-piece. The amount of generated heat affects on micro-structure and quality of the weld, as well as, residual stress and the distortion of work piece. The control of maximum temperature during the welding process leads to successful pro...
Article
This study is undertaken to investigate the effect of different concentrations of Li (0.03–0.35%) on the microstructure and tensile properties of Al–15 wt.%Mg2Si in situ metal matrix composite. The results showed that 0.15 wt.% Li addition changes the morphology of primary Mg2Si from irregular or dendritic to polyhedral shape and its average partic...
Article
Al/AlN nano-composite surface layer was fabricated on 6061 aluminum alloy substrate employing friction stir processing technique. To achieve this, nano-sized AlN powder was inserted into a pre-made groove on the substrate. Optical micrographs showed the presence of a fine dynamically recrystallized grain structure in the stirred zones of the Al/AlN...
Article
In the present work, entropy generation due to natural convection of a nanofluid that consists of water and Cu in a cavity with a protruded heat source has been studied. To investigate both the First and the Second Law of Thermodynamics for this considered problem the numerical scheme carried out based on finite volume method with the SIMPLE algori...
Article
Full-text available
The effect of different solution temperatures has been investigated on the tensile properties of Na-modified Al-Mg2Si in situ composite specimens which were subjected to solutionizing at different temperatures of 480 °C, 500 °C and 520 °C for holding time of 4 h followed by quenching. Tensile test results indicated that elongation value gradually i...
Article
In current research, the influence of different concentrations of Na (0.01–0.2wt.%) on the microstructure and tensile properties of Al-15wt.%Mg2Si in situ metal matrix composite has been investigated. It was found that 0.1wt.% Na addition changes the morphology of primary Mg2Si irregular or dendritic to polyhedral shape and its average particle siz...
Article
The heat affected zone (HAZ), has a great influence on the properties of welded joints since it can alter the microstructure and residual stresses. In this paper, the effect of welding parameters and heat input on the HAZ and grain growth has been investigated. The role of grain size on hardness and toughness of low carbon steel has also been studi...
Article
Full-text available
The present research is undertaken to study the influence of Li on the tensile properties of Al-15%Mg2Si metal matrix composite. The tensile test results show that adding 0.15%Li to the composite raises the UTS and elongation values, insignificantly. In the point of fracture behaviour of the composite, the addition of 0.15%Li converts the fracture...
Article
The objective of this paper is to investigate the conjugated heat transfer in a thick walled cavity filled with copper–water nanofluid. The analysis uses a two-dimensional rectangular enclosure under conjugated convective–conductive heat transfer conditions and considers a range of Rayleigh numbers. The enclosure was subjected to a constant and uni...
Article
In this paper, a numerical analysis is carried out to study the performance of conjugated convection-conduction heat transfer in a fin and thick-walled U-shaped tube heat exchanger subjected to a nanofluid. This geometry is mainly adopted for the aim of heating the chamber of Oghab Afshan bus (SCANIA). The problem is considered as two-dimensional,...
Article
Full-text available
In this study, the corrosion behavior of plasma nitrided AISI 4140 steel before and after oxidation was investigated. Plasma nitriding was carried out at 530°C, 570°C and 630°C for 5h in an atmosphere of 80vol.% N2 and 20vol.% H2. After nitriding, plasma post-oxidation was performed at 450°C for 1h in a gas mixture of 50vol.% O2 and 50vol.% H2. The...
Article
This paper presents a numerical study of natural convection cooling of a heat source horizontally attached to the left vertical wall of a cavity filled with copper-water nanofluid. The left vertical wall is kept at the constant temperature, while the other ones are kept adiabatic. The numerical approach is based on the finite volume method with a c...
Article
Full-text available
In this study, the corrosion behaviour of plasma nitrocarburised AISI4140 steel before and after post-oxidation was investigated. Plasma nitrocarburising was carried out at 530°C, 570°C and 630°C for 5h in an atmosphere consisting of 80vol.% N2, 17vol.% H2 and 3vol.% CO2. After nitrocarburising, plasma post-oxidation was performed at 450°C for 1h i...
Article
Full-text available
In this work a magnetic nano-composite was synthesized by modified incorporation of iron-barium complex into ordered meso-porous silica (MCM-41) as a matrix. The MCM-41 was synthesized by silylation treatment which was accompanied by pH adjusting. Low angle XRD patterns of both annealed MCM-41 and resulted composite exhibited the characteristic ref...
Conference Paper
Nanostructured MoSi2 powder has been successfully synthesized by Ball milling of Mo and Si powder mixtures and subsequent self-propagating high-temperature synthesis (SHS) process. It was observed that in comparison with the normally mixed powder, it could be easily ignited and higher combustion temperature was achieved. Based on XRD and SEM, it wa...
Article
In this paper, synthesis and magnetic characterization of MCM-41-supported CoFe2O4 as a magnetic nano-composite has been investigated by incorporating the cobalt ferrite phase in meso-porous MCM-41 matrix by modified impregnation method. MCM-41 channels act as nano-reactor and cobalt ferrite nano-arrays were synthesized in its channels using the po...
Article
Magnetic nano-composite was synthesized by modified incorporation of iron-barium complex into ordered meso-porous silica (MCM-41) as a matrix. Phase composition, morphology and magnetic properties of the synthesized MCM-41 and the resulted composite were characterized by XRD, HRTEM/EDS and VSM techniques, respectively. Low angle XRD patterns of bot...
Conference Paper
Full-text available
Nano particles of barium hexaferrite, BaO.6Fe2O3, were produced by co-precipitation method using iron and barium nitrate with a Fe/Ba molar ratio of 11. Thermal behavior, phase composition and morphology of the samples were investigated by DTA, XRD and SEM, respectively. Sintering, softening and fusion temperatures of the products were determined b...