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| 1 | Hot Compression Behavior of As-Cast Precipitation-Hardening Stainless Steel显示文摘High temperature deformation characteristics of a semiaustenitic grade of precipitation-hardening stainless steels were investigated by conducting hot compression tests at temperatures of 900-1 100 ℃ and strain rates of 0.001-1 s-1. Flow behavior of this alloy was investigated and it was realized that dynamic recrystallization (DRX) was responsible for flow softening. The correlation between critical strain for initiation of DRX and deformation parameters including temperature and strain rate, and therefore, Zener-Hollomon parameter (Z) was studied. Metallographic observation was performed to determine the as-deformed microstructure. Microstructural observation shows that recrystallized grain size increases with increasing the temperature and decreasing the strain rate. The activation energy required for DRX of the investigated steel was determined using correlations of flow stress versus temperature and strain rate. The calculated value of activation energy, 460 kJ/mol, is in accordance with other studies on stainless steels. The relationship between peak strain and Z parameter is proposed. | A Momeni S M Abbasi A Shokuhfar | 2007 | Journal of Iron and Steel Research(International)2007，14，5： | 9 |
| 2 | Improvement of Mechanical Properties of Cr-Ni-Mo-Cu-Ti Stainless Steel With Addition of Vanadium显示文摘The effect of vanadium (V) addition on the mechanical properties of a Cr-Ni-Mo-Cu-Ti stainless steel was studied and its influence on microstructural changes was also investigated. Results indicate that the structure of the solution-treated specimens mainly comprises of austenite-martensite, and adding V leads to the formation of a considerable amount of ferrite. Under this condition, austenite phase is not mechanically stable, and transforms to martensite by plastic deformation. The addition of 0.5% - 1.0% (in mass percent) of V increases the hardness and the strength of the 80% cold rolled and aged steel, without any effect on ductility. Improvement in mechanical properties is presumably attributed to the formation of a small amount of ferrite in the primary structure, and the formation of certain precipitates is accelerated by the addition of V during aging. By contrast, excessive V decreases the strength and ductility simultaneously. This is due to the strong effect of ferrite formation compared to the beneficial effect of precipitation. The loss of ductility caused by adding higher amount of V is due to the formation of ferrite phases which in turn are suitable nucleation sites for crack propagation. | S M Abbasi A Shokuhfar | 2007 | Journal of Iron and Steel Research(International)2007，14，6： | 7 |
| 3 | Synthesis of iron oxide nanoparticles via sonochemical method and their characterization显示文摘Preparation of iron oxide ( -Fe 2 O 3 ) nanoparticles was carried out via a sonochemical process. The process parameters such as temperature, sonication time and power of ultrasonication play important roles in the size and morphology of the final products. The iron oxide nanoparticles were characterized by transmission electron microscopy, X-ray powder diffraction, and thermogravimetric and differential thermal analyses. From transmission electron microscopy observations, the size of the iron oxide nanoparticles is estimated to be significantly smaller than 19 nm. X-ray diffraction data of the powder after annealing provide direct evidence that the iron oxide was formed during the sonochemical process. | Amir Hassanjani-Roshan Mohammad Reza Vaezi Ali Shokuhfar Zohreh Rajabali | 2011 | Particuology2011，9，1： | 2 |
| 4 | Synthesis and characterization of carbon-coated cobalt ferrite nanoparticles显示文摘Cobalt ferrite nanoparticles(CFNPs) were prepared via a reverse micelle method. The CFNPs were subsequently coated with carbon shells by means of thermal chemical vapor deposition(TCVD). In this process, acetylene gas(C_2H_2) was used as a carbon source and the coating was carried out for 1, 2, or 3 h at 750℃. The Ar/C_2H_2 ratio was 10:1. Heating during the TCVD process resulted in a NP core size that approached 30 nm; the thickness of the shell was less than 10 nm. The composition, structure, and morphology of the fabricated composites were characterized using X-ray diffraction, simultaneous thermal analysis, transmission electron microscopy, high-resolution transmission electron microscopy, and selected-area diffraction. A vibrating sample magnetometer was used to survey the samples' magnetic properties. The deposited carbon shell substantially affected the growth and magnetic properties of the CFNPs. Micro-Raman spectroscopy was used to study the carbon coating and revealed that the deposited carbon comprised graphite, multiwalled carbon nanotubes, and diamond-like carbon. With an increase in coating time, the intensity ratio between the amorphous and ordered peaks in the Raman spectra decreased, which indicated an increase in crystallite size. | Hamed Bakhshi Ali Shokuhfar Nima Vahdati | 2016 | International Journal of Minerals,Metallurgy and Materials2016，23，9： | 2 |
| 5 | A review on guide- lines for management and treatment of common variable immunodefi- ciency 显示文摘 | Abolhassani H Sagvand BT Shokuhfar T | 2013 | Expert Rev Clin Immunol2013，9，6： | 1 |
| 6 | Prediction of the mechanical properties of hydroxyapatite polymethy methacrylate carbon nanotubes nanocomposit显示文摘 | Shokuhfar T Makradi A Titus E | 2008 | J Nanosci Naz:otechno12008，8，8： | 1 |
| 7 | Nanocomposite materials in orthopedic applications显示文摘This chapter is an introduction to nanocomposite materials and its classifications with emphasis on orthopedic application. It covers different types of matrix n anocomposites in eluding ceramics, metal, polymer and natural-based nanocomposites with the main features and applications in the orthopedic. In addition, it presents structure, composition, and biomechanical features ofbone as a natural nanocomposite. Finally, it deliberately presents developing methods for nanocomposites bone grafting. | Mostafa R.Shirdar Nasim Farajpour Reza Shahbazian-Yassar Tolou Shokuhfar | 2019 | Frontiers of Chemical Science and Engineering2019，13，1： | 1 |
| 8 | The influence of friction on the processing of ultrafine-grained/nanostmctured materials by equal-channel angular pressing 显示文摘 | SHOKUHFAR A NEJADSEYFI O | 2014 | Journal of Materials Engineering and Performance2014，23，10： | 1 |
| 9 | Production of a nanocrystalline Ni 3 Al-based alloy using mechanical alloying显示文摘 | Masoud Nazarian Samani Ali Shokuhfar Ali Reza Kamali Morteza Hadi | 2009 | Journal of Alloys and Compounds2009，，1： | 1 |
| 10 | Experimental study of the influence of adhesive reinforcement in lap joints for composite structures subjected to mechanical loads 显示文摘 | Khalili S M R Shokuhfar A Hoseini S D | 2008 | International Journal of Adhesion & Adhesives2008，28，： | 1 |
| 11 | Polycrystalline diamond coatings on steel substrates显示文摘 | NETO V F SHOKUHFAR T OLIVEIRA M S A GR CIO J ALI N | 2008 | Int J Nanomanufacturing2008，2，12： | 1 |
| 12 | Influence of chemical composition and manufacturing conditions on properties of NiTi shape memory alloys 显示文摘 | MEHRABI K BAHMANPOUR H SHOKUHFAR A KNEISSL A | 2008 | Materials Science and Engineering A2008，，： | 1 |
| 13 | Analysis and optimization of smart hybrid composite plates subjected to low-velocity impact using the response surface methodology (RSM)显示文摘 | SHOKUHFAR A KHALILI S M R ASHENAI F G | 2008 | Thin-Walled Structures2008，46，： | 1 |
| 14 | Influence of chemical composition and manufacturing conditions on properties of NiTi shape memory alloys显示文摘 | MEHRABI K BAHMANPOUR H SHOKUHFAR A KNEISSL A | | 0，，： | 1 |
| 15 | Hydroxyapatite modified with carbon-nanotubereinforced poly(methyl methacrylate): A nanocomposite material for biomedical applications显示文摘 | Singh M K Shokuhfar T De Almeida Gracio J J | 2008 | Adv Funct Mater2008，18，5： | 1 |
| 16 | The Influence of Friction on the Processing of Ultrafine-Grained/Nanostructured Materials by Equal-Channel Angular Pressing显示文摘 | A. Shokuhfar O. Nejadseyfi | 2014 | Journal of Materials Engineering and Performance2014，，： | 1 |
| 17 | Effect of micron and nano size oxide material additives on reaction sintering,micro structural and physical properties of Al2TiO5 based显示文摘 | NADERI G SHOKUHFAR A REZAIE H | 2007 | Mater Sci Forum2007，553，： | 1 |
| 18 | The effect of cross linking density on the me- chanical properties and strueture of the epoxy polymers: molecular dynamics simulation显示文摘 | Shokuhfar A Arab B | 2013 | Journal of molecular modeling2013，19，9： | 1 |
| 19 | Formation mechanisms of precipitates in an A1-Cu-Li-Zr alloy and their effects on strength and electrical resistance of the alloy 显示文摘 | AHMADI S ARABI H SHOKUHFAR A | 2009 | Journal of Alloys and Compounds2009，484，12： | 1 |
| 20 | Evaluation of deoxidation process in medical grade of 316L stainless steel显示文摘 | Ahmadi S Hadavi S M Shokuhfar A | 2006 | International Journal of ISSI2006，3，2： | 1 |
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