Hamid Omidvar

Amirkabir University of Technology

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Mehran Javanbakht

Amirkabir University of Technology

Mohammad Sajjadnejad

Yasouj University

A. Mozafari

Milad Hospital

Amirhossein Mashhuriazar

Amirkabir University of Technology

Zainuddin Sajuri

National University of Malaysia

Y. Meas

Center of Research and Technologic Development in Electrochemistry

G. Stremsdoerfer

École Centrale de Lyon

Mohammad Reza Rahimipour

Materials and Energy Research Center

Seyed Hadi Tabaian

Amirkabir University of Technology

Seyyed Ehsan Mirsalehi

Amirkabir University of Technology

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Amirkabir University of Technology

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University of Tehran

Sharif University of Technology

Materials and Energy Research Center

K.N.Toosi University of Technology

Tarbiat Modares University

Iran University of Science and Technology

Islamic Azad University, Science and Research Branch

Islamic Azad University, Tehran

University of Tabriz

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The effect of SiC/Al₂O₃ particles used during FSP on mechanical properties of AZ91 magnesium alloy

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) (2014)

Mostafa Dadaei Hamid Omidvar Behrouz Bagheri Mohammad Jahazi Mahmoud Abbasi

Abstract Friction stir processing, as a method of changing the properties of a metal, through intense, localized plastic deformation, has been developed based on the basic principles of friction stir welding. In the current research, mechanical properties of AZ91 magnesium alloy were modified by the application of friction stir processing. Surface composites using SiC as well as Al 2 O 3 nano-particles were developed. Yield and tensile strengths as well as hardness values of specimens were measured. The results showed that friction stir processing modified the size of grains noticeably and improved the mechanical properties. The results also indicated that SiC particles were more beneficial than Al 2 O 3 particles with regard to improvement of the properties. It was also concluded that homogeneous distribution of particles resulted in the decrease of grain sizes to 3 μm and the increase in strength and formability index to 390 MPa and 6 500 MPa, respectively.

Friction Stir Processing

Friction Stir Welding

Severe Plastic Deformation

10.3139/146.111025

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Citations (46)

Surface modification of lithium metal anode using polar polymer-in-ceramic electrolytes by grafting of anti-perovskite for inhibition dendrite growth

Journal of Energy Storage (2024)

Mahya Nangir Abouzar Massoudi Hamid Omidvar

Dendrite (mathematics)

Lithium metal

Surface Modification

10.1016/j.est.2024.114984

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Citations (1)

Influence of anodization parameters on the morphology of TiO2 nanotube arrays

Superlattices and Microstructures (2011)

Hamid Omidvar Saba Goodarzi Ahmad Seif Amir Reza Azadmehr

Anodizing

Phosphoric acid

Morphology

10.1016/j.spmi.2011.04.006

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Citations (51)

Textural and structural evolution of pulse electrodeposited Ni/diamond nanocomposite coatings

Journal of Alloys and Compounds (2016)

Mohammad Sajjadnejad Hamid Omidvar Mehran Javanbakht A. Mozafari

Nanodiamond

Texture (cosmology)

Synthetic diamond

10.1016/j.jallcom.2016.12.318

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Citations (41)

FLOW BEHAVIOR OF COMMERCIAL GRADE TI-6AL-4V WITH LAMELLAR STRUCTURE IN ISOTHERM FORGING AND KINETIC ANALYSIS OF PROCESS

Journal of Advanced Materials in Engineering (Esteghlal) (2011)

Hamid Omidvar B Fallah Ghanbary Morteza Tamizifar

Titanium alloy

Source

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Study on the microstructure and mechanical properties of diffusion brazing joint of C17200 Copper Beryllium alloy

Materials & Design (1980-2015) (2013)

Khadijeh Esmati Hamid Omidvar J. Jelokhani M. Naderi

Brazing

Tensile testing

10.1016/j.matdes.2013.07.080

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Citations (22)

Microstructural and mechanical assessment of transient liquid phase bonded commercially pure titanium

Canadian Metallurgical Quarterly (2017)

Sajad Shakerin Vahid Maleki Seyyed Alireza Ziaei Hamid Omidvar Mohammad Reza Rahimipour

Diffusion joining of commercially pure titanium was successfully prepared via transient liquid phase bonding in vacuum environment. The process was carried out using AMS 4772 silver-based filler alloy at 900–1000°C for various holding time under the vacuum of 6 × 10−7 Torr. Optical and scanning electron microscopy equipped with an EDS analyzer was conducted for microstructural evaluations. Mechanical properties were also investigated by shear test, fractographic assessment and X-ray diffraction analyses. The tendency to achieve isothermally solidified joint increased by increasing bonding time. No sign of athermal solidification was detected of sample bonded at 1000°C for 90 min. Consequently, the bonding condition of a high quality joint was obtained. Elemental analyses revealed that filler alloy's elements (Ag, Cu) distributed more uniformly in fully isothermal solidified bond, whereas the aggregation of these elements is considerable in athermally solidified bond. Shear test results represented that the highest shear strength attributed to the sample bonded in isothermal solidified condition (bonded at 1000°C for 90 min).

Isothermal process

Diffusion bonding

Titanium alloy

10.1080/00084433.2017.1349024

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Characterisation of CNTs/TiO<SUB align="right">2 nano composites and investigation of composite's photo reactivity

International Journal of Materials and Product Technology (2016)

Hamid Omidvar Mohammad Sajjadnejad Keyvan Mirzaei Zahra Sadeghian Sara Shirazi

Titanium dioxide (TiO2) nanoparticles have been successfully deposited onto acid treated carbon nanotubes via a simple chemical route. It was demonstrated that the CNTs were coated by well-dispersed TiO2 nanoparticles. The CNTs-TiO2 nano composites were characterised by XRD, FTIR, SEM, EDAX and TEM. The photo catalytic activity of the prepared nano composites was tested under UV irradiation using the results of phenol degradation. Different composites were used as catalyst to investigate the effect of CNTs type and TiO2/CNT mass ratio on phenol removal. UV-vis spectroscopy was used to measure phenol adsorption.

Titanium Dioxide

10.1504/ijmpt.2016.075502

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Citations (5)

Influences of Friction Stir Welding Parameters on Microstructural and Mechanical Properties of AA5456 (AlMg5) at Different Lap Joint Thicknesses

Journal of Materials Engineering and Performance (2015)

M. R. Pishevar Jamshid Aghazadeh Mohandesi Hamid Omidvar M. A. Safarkhanian

Friction Stir Welding

Double pass

Fusion welding

First pass

10.1007/s11665-015-1683-y