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| 1 | Microstructural analyses of aluminum–magnesium–silicon alloys welded by pulsed Nd: YAG laser welding显示文摘Revealing grains and very fine dendrites in a solidified weld metal of aluminum–magnesium–silicon alloys is difficult and thus,there is no evidence to validate the micro-and meso-scale physical models for hot cracks. In this research, the effect of preheating on the microstructure and hot crack creation in the pulsed laser welding of AA 6061 was investigated by an optical microscope and field emission electron microscopy. Etching was carried out in the gas phase using fresh Keller’s reagent for 600 s. The results showed that the grain size of the weld metal was proportional to the grain size of the base metal and was independent of the preheating temperature. Hot cracks passed the grain boundaries of the weld and the base metal. Lower solidification rates in the preheated samples led to coarser arm spacing;therefore, a lower cooling rate. Despite the results predicted by the micro and meso-scale models, lower cooling rates resulted in increased hot cracks. The cracks could grow in the weld metal after solidification;therefore, hot cracks were larger than predicted by the hot crack prediction models. | Hossain Ebrahimzadeh Hassan Farhangi Seyed Ali Asghar Akbari Mousavi Arman Ghahramani | 2020 | International Journal of Minerals,Metallurgy and Materials2020，27，5： | 3 |
| 2 | Effect of Sinter Hardening on Microstructure and Mechanical Properties of Astaloy 85Mo显示文摘Effect of sinter hardening on the microstructure, density, hardness and tensile properties of Astaloy 85Mo+0.7% graphite was investigated. For this purpose, Astaloy 85Mo, a pre-alloyed powder, was mixed with 0.7% UF4 graphite and then pressed in single action die and sintered at 1 120 ℃ for 30 min in N2-10%H2 atmosphere. Then samples were cooled from 0.5 to 3 ℃/s sintering temperature in accordance with different cooling rates. The difference in microstructure, hardness, density and tensile properties of the samples associated with different cooling rates from sintering temperature has been investigated. The results show that the microstructure remains bainitic by changing cooling rate, but it becomes finer and then the hardness and tensile strength of the samples will increase by increasing the cooling rate from sintering temperature. | K Sheikhi Moghaddam M Ghambari H Farhangi N Solimanjad | 2012 | Journal of Iron and Steel Research(International)2012，19，10： | 2 |
| 3 | Attenuation of oxidative stress in streptozotocin-induced diabetic rats by Eucalyptus globulus显示文摘 | Alireza Nakhaee Mohammad Bokaeian Mohsen Saravani Ali Farhangi Azim Akbarzadeh | 2009 | Indian Journal of Clinical Biochemistry2009，，4： | 2 |
| 4 | Occurrence distribution and relative incidence of mosaic viruses infecting field-grown squash in Tehran Province, Iran显示文摘 | Farhangi S H Mosahebi G Habibi M K Okhowai S M | 2004 | Agricultural and Biological Sciences2004，69，4： | 1 |
| 5 | Growth, physiological and immunological responses of rainbow trout (Oncorhynchus mykiss )to different dietary inclusion levels of dehulled lupin (Lupinus angustifolius) 显示文摘 | Farhangi M Carter C G Hardy R W | 2001 | Aquaculture Research2001，32，1： | 1 |
| 6 | Fe304@ SiO2-TEMPO as a magnetically recyclable catalyst for highly selective aerobic oxidation of 5-hydroxymethylfurfural into 2,5- diformylfuran under metal-and halogen-free conditions显示文摘 | Karimi B Mirzaei H M Farhangi E | 2014 | Chemcatchem2014，6，3： | 1 |
| 7 | A Modular Strategy for Control and Voltage Balancing of Cascaded H-Bridge Rectifiers显示文摘 | Imart-Eini H Schanen J L Farhangi S | 2008 | IEEE Transactions on Power Electronics2008，23，5： | 1 |
| 8 | A modular power elec- tronic transformer based on a cascaded H-bridge multilevel converter显示文摘 | Iman-Eini H Farhangi S Schanen J L | 2009 | Electric Power Systems Research2009，79，12： | 1 |
| 9 | A fuzzy logic direct yawmoment control system for all-wheel-drive electric显示文摘 | Tahami F Farhangi S Kazemi R | 2004 | Vehicles System Dynamics2004，41，3： | 1 |
| 10 | A Fuzzy Logic Direct Yaw-Moment Control System for All-Wheel- Drive Electric Vehicles显示文摘 | Farzad Tahami Shahrokh Farhangi Reza Kazemi | 2004 | Vehicle System Dynamics2004，41，3： | 1 |
| 11 | The path of the smart grid显示文摘 | H FARHANGI | | 0，，01： | 1 |
| 12 | A modular strategy for control and voltage balancing of cascaded H- bridge rectifiers显示文摘 | Iman-Eini H Schanen J L Farhangi S | 2008 | IEEE Transactions on Power Electronics2008，23，5： | 1 |
| 13 | Isolation and Purification of Rat Islet Cells by Flow Cytometry显示文摘 | Azim Akbarzadeh Dariush Norouzian Ali Farhangi | 2008 | Indian Journal of Clinical Biochemistry2008，23，1： | 1 |
| 14 | The path of the smart grid显示文摘 | Farhangi H | 2010 | IEEE Power and Energy Magazine2010，8，1： | 1 |
| 15 | Dynamics of droplet coalescence in response to increasing hydrophobicity显示文摘 | GRAHAM P J FARHANGI M M DOLATABADI A | 2012 | Physics of Fluids2012，24，11： | 1 |
| 16 | A modular strategy for control and voltage balancing of cascaded H-bridge rectifiers 显示文摘 | IMAN-EINI H SCHANEN J L FARHANGI S | 2008 | IEEE Trans on Power Electronics2008，23，5： | 1 |
| 17 | Silica sulfuric acid promoted the one-pot synthesis of trisubstituted imidazoles under conventional heating conditions or using microwave irradiation显示文摘 | SHAABANI A RAHMTI A FARHANGI E | 2007 | Catalysis Communications2007，8，7： | 1 |
| 18 | The path of the smart grid显示文摘 | FARHANGI H | 2009 | IEEE Power and Energy Magazine2009，8，1： | 1 |
| 19 | Fe doped TiO2-graphene nanostructures : synthesis, DFI' modeling and photoca- talysis 显示文摘 | Farhangi N Ayissi S Charpentier P A | 2014 | Nanotechnology2014，25，30： | 1 |
| 20 | Commercial materials as cath- ode for hydrogen production in microbial electrolysis cell 显示文摘 | Farhangi S Ebrahimi S Niasar M S | 2014 | Bio- technol Lett2014，36，： | 1 |
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