Research Paper Ceramics
The Relationship between Structural and Optical Properties of GeO2-PbO Glasses

Mohsen Nouri; Parvin Alizadeh; Majid Tavoosi

Volume 5, Issue 2 , April 2017, Pages 3-10

Abstract
  The structural and optical characterization of bulk GeO2-PbO glasses was the goal of this study. In this regard, six different (100-x)GeO2‌-xPbO (15<x<45) glasses were prepared by conventional melt quenching technique between two steel sheets. The produced samples were characterized using scanning ...  Read More

Research Paper Composite materials
On the fabrication and characterization of Al5083/Al2O3 surface nanocomposite via friction stir processing

Akbar Heidarpour; Saeed Ahmadifard; Shahb Kazemi

Volume 5, Issue 2 , April 2017, Pages 11-24

Abstract
  In the present study, Al5083- Al2O3 nanocomposite was successfully prepared by friction stir processing (FSP) with rotational speed of 710 rpm and travel speed of 14 mm/min. In order to improve distribution of Al2O3 particles, a net of holes were designed on the surface of Al5083 sheet. The samples were ...  Read More

Research Paper Corrosion and protection of materials
The effect of saccharin on microstructure and corrosion behavior of nanocrystalline nickel thin films in alkaline solution

Behrooz Shayegh; Nima Zaghian

Volume 5, Issue 2 , April 2017, Pages 25-37

Abstract
  In this study the effect of crystallite size reduction and microstructure on the electrochemical corrosion behavior of nanocrystalline nickel (NC Ni) were investigated using Tafel polarization and electrochemical impedance spectroscopy (EIS) measurements in 10 wt.% NaOH. NC Ni coatings were produced ...  Read More

Research Paper
Optimization of the strain distribution in the roll forming process using the desirability function and finite element methods

Siroos Ahmadi; Vali Alimirzaloo; Meysam Abdollahzade Gavgani

Volume 5, Issue 2 , April 2017, Pages 38-51

Abstract
  Defects of the roll forming process are affected by amount and situation of the strains distribution. The effect of the process parameters on the strain distribution in the round cross section roll forming process has been studied. Finite element and response surface method have been used for process ...  Read More

Research Paper Materials synthesis and charachterization
Estimation of the mean grain size of mechanically induced Hydroxyapatite based bioceramics via artificial neural network

Mohammad Fahami; Majid Abdellahi

Volume 5, Issue 2 , April 2017, Pages 52-60

Abstract
  This study focuses on the estimation of the mean grain size of mechanically induced Hydroxyapatite (HA) through the artificial neural network (ANN) model. The mean grain size of HA and HA based nanocomposites at different milling parameters were obtained from previous studies. The data were trained ...  Read More

Research Paper
Elastic characterization of porous bone by ultrasonic method through Lamb waves

lahcen Mountassir; Touriya Bassidi; Hassan Nounah

Volume 5, Issue 2 , April 2017, Pages 61-74

Abstract
  The object of this research is to characterize the porous bones by an ultrasonic method using Lamb waves. In recent years, the characterization of such materials has attracted many authors and takes a perfect place in the field of medicine. It requires the development of more efficient technology for ...  Read More

Research Paper Metallurgical Modeling
Upper bound and numerical analysis of cyclic expansion extrusion (CEE) process

M. M. Samandari; S.H.R. Torabi; Ghader Faraji

Volume 5, Issue 2 , April 2017, Pages 75-86

Abstract
  Deformation of the material during cyclic expansion extrusion (CEE) is investigated using upper-bound theorem. The analytical approximation of forming loads agrees very well with the FEM results for different amounts of chamber diameter, friction factor and also for lower die angles. However, the difference ...  Read More

Research Paper Materials synthesis and charachterization
The thermal conductivity investigation of nanofluids containing decorated Ag nanorods with Cu nanoparticles using statistical method

Sedigheh Abbasi; Farid Nourivatan

Volume 5, Issue 2 , April 2017, Pages 87-98

Abstract
  In this paper, we investigated the statistical analysis of thermal conductivity of nanofluids containing of decorated Ag nanorods with Cu nanoparticles. For this purpose Ag-Cu hybrid is synthesized and characterized using transmission electron microscopy (TEM) and X-ray diffraction pattern (XRD). TEM ...  Read More