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| 1 | Investigation on Electron Beam Welded Copper to AISI 316 Stainless Steel Joints显示文摘Joints of copper and stainless steels are used in a er ospace applications. Production of these joints by fusion welding faces many dif ficulties. This may be due to the differences in their physical, metallurgical a nd mechanical properties. Electron Beam Welding (EBW) process has been found to be especially well suited in this area. Selection of the appropriate welding par ameters needs thorough investigations. These parameters include: preheat tempera ture (℃), welding current (I w), focusing current (I F), welding spee d (V), height between the gun and workpiece surface (H), scan width (S w) and shift distance (S). The present work aims firstly, setting the pr oper welding conditions to get sound joint between commercially pure copper (C10 200) and AISI 316 stainless steel plates 8 mm thickness. Secondly, investigate t he effect of Electron Beam (EB) shift, single-sided and double-sided welds on the mechanical, metallurgical and chemical properties of the weld bead. Due to t he high difference in thermal conductivity between copper and stainless steel, E lectron Beam (EB) was shifted towards copper with different values. These values were ranged from 0.3 to 0.9 mm in welding without preheating of copper plate an d from 0.1 to 0.4 mm with preheating. Number of joints were welded using variabl e EBW parameters in view to obtain the sound weld bead. These parameters are as follows: gradual reduction I w=51 to 49 mA, I F=845 mA, V=8 mm/sec , H=130 mm, S w=500 μm and S=0.4 mm. The investigation has shown t hat, the copper (C10200) plate must be preheated to get sound welded joint with AISI 316 stainless steel using the EBW process. The tensile fracture in all wel ded samples occurred in copper plate away from the weld bead. This reflects that the weld bead tensile strength is greater than the copper strength. The EB shif t has slight effect on hardness distribution through weld bead. The hardness val ue (H v) reduces in gradual manner from stainless steel hardness to copper one. The EB shift distance has no significant effect on the impact toughness. | El-Hebeary M R Megahed H Elziady N | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 2 |
| 2 | Variable viscosity and slip velocity effects on the flow and heat transfer of a power-law fluid over a non-linearly stretching surface with heat flux and thermal radiation 显示文摘 | MEGAHED A M | 2012 | Rheologica Acta2012，51，： | 1 |
| 3 | Papulonodular mucinosis associated with subacute cutaneous lupus erythematosus显示文摘 | Sonntag M Lehmann P Megahed M | | 0，，04： | 1 |
| 4 | Applications of iterative elastic techniques for elastic-plastic analysis of pressure vessels显示文摘 | MOHAMED A I MEGAHED M M BAYOUMI L S | 1999 | Journal of Pressure Vessel Technology1999，121，： | 1 |
| 5 | Histopathology of photodermatoses显示文摘 | Megahed M Schaller J | 2006 | Hautarzt2006，57，12： | 1 |
| 6 | Histopathoio^v ofphotodermatoses 显示文摘 | Megahed M Schalier J | 2006 | Haularzt2006，57，12： | 1 |
| 7 | SehonleinHenoch purpura associated with gastric Helicobactor pylori infection显示文摘 | Megahed M Goerz G | 1995 | J Am A''cad Dermatol1995，33，52： | 1 |
| 8 | Synergism of RAD and cyclosporin A in prevention of acute rat corneal allograft rejection 显示文摘 | Reis A Megahed M Reinhard T | 2002 | Cornea2002，21，1： | 1 |
| 9 | A simplified technique for shakedown limit load determination显示文摘 | ABDALLA H F MEGAHED M M YOUNAN M Y | 2007 | Nuclear Engineering and Design2007，237，1213： | 1 |
| 10 | Thyroglossal duct cyst papillary carcinoma显示文摘 | BALALAA N MEGAHED M ASHARI M A | 2011 | Case Rep Oncol2011，4，： | 1 |
| 11 | A simplified technique for shakedown limit load determination of a large square plate with a small central hole under cyclic biaxial loading显示文摘 | ABDALLA H F MEGAHED M M MOHAMMAD M | 2011 | Nuclear Engineering andDesign2011，241，3： | 1 |
| 12 | Schonlein- Henoch Purpura associated with gastric Hellcobacter Pylori infection 显示文摘 | Reinauer S Megahed M Goerz G | 1995 | J Am A cad Dematol1995，33，52： | 1 |
| 13 | Treatment of ci?catricial pemphigoid with mycophenolate mofetil as a steroid?sparing agent显示文摘 | Megahed M Schmiedeberg S Becker J | 2001 | J Am Acad Dennatol2001，45，2： | 1 |
| 14 | MHD flow and heat transfer in a non-Newtonian liquid film over an unsteady stretching sheet with variable fluid properties显示文摘 | Mahmoud M A A Megahed A M | 2009 | Canadian Journal of Physics2009，87，10： | 1 |
| 15 | Shakedown analysis of 90-degree mitred pipe bends显示文摘 | KORBA A G MEGAHED M M ABDALLA H F | 2013 | European Journal of MechanicsA/Solids2013，40，： | 1 |
| 16 | Porokeratosis: present con- cepts 显示文摘 | Sertznig P yon Felbert V Megahed M | 2012 | J Eur Acad Dermatol Venereol2012，26，4： | 1 |
| 17 | Modeling and Simulation of Planar Flexible Link Manipulators with Rigid Rip Connec- tions to Revolute Joints显示文摘 | MEGAHED S M HAMZA K T | 2004 | Robotica2004，22，： | 1 |
| 18 | Low-cycle fatigue in rotating cantilever under bending Ⅲ: experimental investigations on notched specimens显示文摘 | Eleiche A M Megahed M M Abd-Alah N M | 2006 | International Journal of Fatigue2006，28，： | 1 |
| 19 | Low-cycle fatigue in rotating cantilever under bending Ⅰ : Theoretical analysis显示文摘 | Megahed M M Eleiche A M Alah N M | 1996 | International Journal of Fatigue1996，18，6： | 1 |
| 20 | Low-cycle fatigue in rotating cantilever under bending Ⅱ: experimental investigations on smooth specimens显示文摘 | Eleiche A M Megahed M M Abd-Alah N M | 1996 | International Journal of Fatigue1996，18，6： | 1 |
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