S.M. Fatemi-Varzaneh

Mechanical Properties and Corrosion Behavior of Biodegradable Metals: Current Challenges

Fatemeh Nazeran, S.M. Fatemi-Varzaneh, Nafiseh Mollaei, M.H. Pishbin et autres

Biodegradable metals have emerged as promising alternatives to permanent implants because they provide temporary mechanical support while gradually degrading after tissue healing, eliminating the need for removal surgery. Among the main biodegradable systems, Fe-, Mg-, and Zn-based alloys each offer unique advantages …

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Compressive Mechanical Anisotropy Evolution in Pretwinned AZ31 Mg Alloy upon Annealing

S.M. Fatemi-Varzaneh, Henryk Paul, José-María Cabrera

Pretwinning followed by annealing was employed to modify the microstructure and texture of an AZ31 wrought magnesium alloy. A precompression step was applied to an as-rolled plate to introduce dense extension twin bands, after which annealing at 300 °C for 5, 15, …

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In-situ TiC-reinforced titanium nanocomposite synthesized via multi-pass friction stir processing with nanodiamond additions

Reza Madadi, Seyed Mohammad Hassan Pishbin, S.M. Fatemi-Varzaneh, Jae‐Hyung Cho et autres

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Optimizing anatase TiO₂ through aluminium doping: A comprehensive study for enhanced dye-sensitized solar cell performance

S.M. Fatemi-Varzaneh, Abiram Angamuthu, Nico A. J. M. Sommerdijk, Archana Ashok et autres

With its consistent porosity, enhanced crystallinity, improved light absorption and superior dye loading, Al-doped TiO₂ exhibits exceptional photoelectrochemical qualities. These variables are essential for dye-sensitized solar cell (DSSC) performance enhancement and photoanode optimization. Despite a great deal of research, the relationship between …

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Influence of process parameters and nanoparticles additives on the performance of IN625 - AISI316 unlike joint formed through friction stir welding

Sanu Kailordson K., S.M. Fatemi-Varzaneh, B Tamilvanan

Abstract The demand for advanced structural materials necessitates components with superior mechanical properties to endure diverse loads. Dissimilar joints like IN625 and AISI316 combine unique attributes, offering significant potential. However, achieving reliable joints with optimal performance under unreliable circumstances remains a critical …

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Development of annealing texture in biodegradable Zn-Mn-Mg alloy

S.M. Fatemi-Varzaneh, Nafiseh Mollaei, Jessica Calvo, José-María Cabrera

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Impact of various nanoparticles on mechanical properties and wear resistance in IN625-AISI316 friction stir welded dissimilar joints

Sanu Kailordson K., S.M. Fatemi-Varzaneh

Purpose The increasing demand for advanced materials in structural applications requires components that can withstand diverse load conditions while offering a combination of mechanical properties to improve overall performance. Dissimilar material joints, such as those between IN625 and AISI316, offer promising potential …

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The temperature dependence of cyclic dynamic recrystallization in as-extruded pure zinc

Mohsen Chegini, S.M. Fatemi-Varzaneh, Nafiseh Mollaei, Wiktor Bednarczyk

The deformation characteristics of as-extruded pure zinc were studied over a wide deformation temperature range from -40 °C to 300 °C. Two-cycle dynamic recrystallization was recognized for the first time to occur at different temperatures, leading to an oscillatory flow curve. The …

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Flow softening, twinning and dynamic evolution of second phase particles in a rolled Mg–Y-Nd-Zr alloy under shear deformation mode

S.M. Fatemi-Varzaneh, Y. Moradipour, R. Chulist, Henryk Paul

Shear punch deformation was employed to study the shear deformation behavior as well as microstructural evolution of a Mg–Y-Nd-Zr alloy at a wide temperature range of 25–500 °C under different strain rates. The results showed that metastable β″andβ′ phases may dynamically precipitate …

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Zinc based bioalloys processed by severe plastic deformation – A review

Nafiseh Mollaei, S.M. Fatemi-Varzaneh, Mohammadreza Abootalebi, Hossein Razavi

Zinc based alloys have recently attracted great attention as promising biodegradable metals. Zinc exhibits moderate degradation rates in biological fluid and the zinc releases during the degradation process is considered safe to human systems. However, these materials exhibit critical limitations in terms …

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The effect of twinning on texture evolution during ECAP processing of an AM30 magnesium alloy

S.M. Fatemi-Varzaneh, Ali Akbar Kazemi Asl, Amir Abedi

An AM30 magnesium alloy was processed through ECAP method at 200 °C. Optical and transmission electron microscopy as well as electron back scattered diffraction (EBSD) technique were employed to characterize the deformed microstructure. A partially recrystallized microstructure including ultrafine/nano structures was obtained. …

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Recrystallization texture during ECAP processing of ultrafine/nano grained magnesium alloy

S.M. Fatemi-Varzaneh

An ultrafine/nano grained AZ31 magnesium alloy was produced through four-pass ECAP processing. TEM microscopy indicated that recrystallized regions included nano grains of 75 nm. Pole figures showed that a fiber basal texture with two-pole peaks was developed after four passes, where a …

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