Amirhossein Meysami

University of Utah

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Reza Amini Najafabadi

Golpayegan University of Engineering

Mohammad Meysami

Clarkson University

M.R. Aboutalebi

Iran University of Science and Technology

Reza Ghasemzadeh

University of Tehran

Taghi Isfahani

Golpayegan University of Engineering

Reza Rezaei

University of Tehran

Mohammad Khodaei

Golpayegan University of Engineering

H. Seyedyn

Iran University of Science and Technology

Shirin Mahmoudi

Islamic Azad University Central Tehran Branch

Mahmoud Hajisafari

Islamic Azad University, Yazd

Cooperative Institutions

Golpayegan University of Engineering

Isfahan University of Technology

Iran University of Science and Technology

Tarbiat Modares University

Islamic Azad University, Yazd

University of Tehran

Materials and Energy Research Center

Islamic Azad University, Science and Research Branch

University of Alberta

McGill University

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The Microstructure and Mechanical Properties of Direct-Quenched and Tempered AISI 4140 Steel

Amirhossein Meysami Reza Ghasemzadeh H. Seyedyn M.R. Aboutalebi Reza Rezaei

10.1002/9781118062142.ch90

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Experimental Effects Investigation of Ultrasonic Spot Welding on Dissimilar Al3105 and Al1050 Alloys Joining

Journal of Welding Science and Technology of Iran (2021)

Hamed Masoumi Hamed Razavi Amirhossein Meysami Mohammad Khodaei

Spot welding

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Investigation of structural properties of forsterite coating on AZ91 magnesium alloy by sol-gel method

Results in Engineering (2023)

Parvin Siahmard Reza Amini Najafabadi Amirhossein Meysami Mohammad Meysami Taghi Isfahani

This study examined the synthesis and characterization of a nanostructured forsterite coating on a biodegradable AZ91 alloy to enhance its bioactivity. The coating was applied using sol-gel technique, resulting in a homogeneous and crack-free surface as confirmed by scanning electron microscopy. X-ray diffraction was used to identify the phases present in the coating, which confirmed the presence of forsterite particles with an average size of 35 nm. To evaluate the effectiveness of the coating, potentiodynamic polarization electrochemical tests were conducted in simulated body fluid (SBF), which showed that the corrosion current density decreased from 11 μA cm−2 for uncoated samples to 4.3 μA cm−2 for coated samples. Moreover, the surface of the coated magnesium alloy showed fewer cracks and cavities after being immersed in SBF for 672 h. Given that the early degradation of magnesium alloy poses challenges for prostheses and bone stabilizers, this coating could promote bone healing and positive interaction with bone tissue while preventing toxicity from metal ions.

Simulated body fluid

Forsterite

10.1016/j.rineng.2023.101138

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Citations (6)

Effects of post-weld heat treatment temperature on the microstructure and mechanical properties of welded A517-Gr.B steel by SMAW method

Metallurgical Research & Technology (2017)

Nazem Habibpour Ali Shafyei Reza Amini Najafabadi Amirhossein Meysami

Welding residual stresses have consequences for the performance of welded components. The remaining stresses can be reduced by post-weld heat treatment (PWHT). In this study, A517-Gr.B steel specimens welded by shielded metal arc welding (SMAW) were subjected to PWHT at 450 °C, 500 °C, 550 °C, and 600 °C to study the effects of these temperatures on yield, tensile, bending, and impact strengths. The fracture surfaces of the specimens heat treated at different temperatures were studied using the scanning electron microscope (SEM). The results indicated that the optimum temperature for PWHT was below 500 °C. Higher PWHT temperatures increased yield strength, tensile strength, and ductility of the weld piece but greatly decreased its bending weld strength.

10.1051/metal/2017032

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Proposal of a New Hf(IV)/Zr(IV) Separation System by the Solvent Extraction Method

Chinese Journal of Chemistry (2008)

Kamal Saberyan Amirhossein Meysami Fereshteh Rashchi Ehsan Zolfonoun

A liquid-liquid extraction study has been conducted to separate hafnium from zirconium, using Cyanex 301 in kerosene. It was observed that the initial pH increase caused an increase in the Zr(IV)/Hf(IV) separation factor. Moreover, the distribution decreased with the temperature increase, suggesting that the reaction is exothermic. In agreement with the resulting data, the optimum separation factor illustrates the value of 7 at a pH of 4.00 in the presence of NaCl as an added salt. The attractive characteristic of the presently designed method is the higher extractability of hafnium-Cyanex 301 relative to zirconium-Cyanex 301 complexes.

Hafnium

Exothermic reaction

Kerosene

10.1002/cjoc.200890369

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Citations (17)

Evaluation and comparison the effect of heat treatment on mechanical properties of NiCrBSi thermally sprayed coatings

Anti-Corrosion Methods and Materials (2017)

Mohsen Shabanlo Reza Amini Najafabadi Amirhossein Meysami

Purpose This study aims to investigate the effect of post heat treatment on mechanical properties of NiCrBSi coatings, which were applied on 316L stainless steel using high-velocity oxygen-fuel (HVOF) and flame spray techniques. Design/methodology/approach The properties of coatings were investigated by metallographic characterizations as well as wear, micro-hardness and adhesion tests. Findings The micro-hardness results showed that the coatings considerably increased the sub-layer hardness. In addition, regarding the wear test results, it can be seen that heat treatment increased wear resistance of the coatings. These thermal sprayed coatings are usually re-melted by post heat treatment, leading to improvement in tribological properties. The results obtained revealed that re-melting procedure improved the metallurgical bonding in the substrate\coating interface. Originality/value Microstructure defects resulting from thermal spraying such as pores and unmelted particles can be eliminated by post heat treatment. This process can considerably improve the corrosion and wear resistances of the thermal sprayed coatings.

10.1108/acmm-02-2017-1756

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Citations (9)

Microstructural Evolution of X45CrNiW189 Valve Steel During Hot Deformation

international journal of iron and steel society of iran (2015)

Amirhossein Meysami Reza Amini Najafabadi

The hot compression tests were carried on X45CrNiW189 valve steel (X45) in the temperature range of 1000– 1200 °C and the strain rate range of 0.004 – 0.5 s-1 in order to study the high temperature softening behavior of this steel. For the exact prediction of flow stress, the effective stress-effective strain curves were obtained from experiments under various conditions. On the basis of experimental results, the dynamic recrystallization fraction (DRX), austenite grain size (AGS), hot deformation and activation energy behavior were investigated. It was found that the calculated results were in a good agreement with the experimental flow stress and the microstructure of the steel for different conditions of hot deformation.

Dynamic Recrystallization

Flow stress

Recrystallization (geology)

Atmospheric temperature range

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Characterization and wear behavior analysis of tungsten carbide-nickel cladding deposited on carbon steel by GTAW

Results in Engineering (2024)

Amirhossein Meysami Reza Amini Najafabadi Mohammad Meysami

This study investigates the effect of a tungsten carbide-nickel coating on the wear resistance of plain carbon steel. The primary phases identified in the coating were Fe3W3C, Fe4W2C, and a eutectic structure containing Fe3W3C and (Fe–Ni)-α. Wear behavior was evaluated through a friction coefficient test and Scanning Electron Microscopy (SEM) analysis. The coated samples exhibited a significantly lower friction coefficient compared to the uncoated sample, indicating superior wear resistance. This improvement is attributed to the presence of a network of (Fe, W)3C carbides and the strong interfacial bonding between the coating and substrate. Coated surfaces displayed parallel scratches and small wear particles, indicative of a scratch-type wear mechanism. Microhardness measurements revealed a distinct profile across the coating thickness. The high hardness near the surface is attributed to the presence of simple carbides. Hardness increased further in the center of the coating due to optimized welding parameters. Hardness decreased towards the interface with the substrate due to a decrease in alloying elements and a shift towards complex carbides.

Cladding (metalworking)

Tungsten Carbide

Carbon steel

Characterization

10.1016/j.rineng.2024.102369

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Modeling Direct Quenching Effects on Microstructural Evolutions in AISI 4140 Steel: A Finite Volume Approach

Journal of Materials Engineering and Performance (2024)

Amirhossein Meysami Goodarz Ahmadi Alex Meisami

Volume fraction

Isothermal transformation diagram

10.1007/s11665-024-09443-1

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Simulation of fluid flow and solididification in the funnel type crystalizer of thin slab continuous cast

Oriental Journal Of Chemistry (2013)

Mohammad Hadi Zare Amirhossein Meysami Shirin Mahmoudi Mahmoud Hajisafari M MazarAtabaki

Oriental Journal of Chemistry is a peer reviewed quarterly research journal of pure and applied chemistry. It publishes standard research papers in almost all thrust areas of current chemistry of academic and commercial importance. It provides a platform for rapid publication of quality research papers, reviews and chemistry letters. Oriental Journal of Chemistry is abstracted and indexed in almost all reputed National and International agencies.

Material chemistry

Industrial chemistry

Elsevier Biobase

Funnel

FLUIDEX

10.13005/ojc/290408

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Citations (8)