List of Articles Aluminum alloy

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  1 - Investigating the Effects of Expansion Equal Channel Angular Extrusion (Exp-ECAE) on Dynamic Behavior of AA7075 Aluminum Alloy
  J. Shahbazi Karami S. Sepahi-Boroujeni Mohsen Khodsetan
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  2 - Application of the GTN Model in Ductile Fracture Prediction of 7075-T651 Aluminum Alloy
  S.F Hosseini S Hadidi-Moud
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  3 - Investigating the effect of flash gutter geometry on material flow and defect formation in cold forging of AA 3003 Aluminum alloy
  milad Bandad Mehrdad Ozve Aminian
  The aim of this study, is study on the effects of flash gutter geometry on the material flow, predict of defect formation and forging process parameters in cold forging. For this purpose, effects of three flash geometry with trapezoidal, oval and square shapes were inve More

  The aim of this study, is study on the effects of flash gutter geometry on the material flow, predict of defect formation and forging process parameters in cold forging. For this purpose, effects of three flash geometry with trapezoidal, oval and square shapes were investigated on the simple frustum part. The effect of flash gutter geometry simulated using ABAQUS finite element software and then form with the optimized flash gutter was manufactured and forging process to verify the simulation results on a piece of AA3003aluminum alloy, was carried out. The results showed that trapezoidal flash gutter had more appropriate conditions for material flow than other cases. According to the simulation results, the maximum plastic strain was formed around the flash area and its value was maximum in the die with trapezoidal flash gutter, which was due to the greater flow of the material in the trapezoidal flash gutter geometry. According to the simulation results prediction, the distribution and exerted applied pressure to produce the final part on die with square flash gutter was more than others. The maximum applied pressure was on the flash area of die, which was the largest for the square flash gutter, and had the smallest amount of trapezoidal flash gutter geometry. Manuscript profile
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  4 - Experimental investigation of microstructure of aluminum alloy in ECAP process with comparison of two round and square cross sections
  Mehdi Rafiei
  Pressing materials in ECAP angular molds is one of the forming methods and processes that is done in order to create high strains and stiffness with microstructural improvement. Using angle forming in molds with high pressure, and due to the certation of work hardening More

  Pressing materials in ECAP angular molds is one of the forming methods and processes that is done in order to create high strains and stiffness with microstructural improvement. Using angle forming in molds with high pressure, and due to the certation of work hardening phenomena, microstructural improvement, good mechanical properties and high flexibility can be achieved. In this paper, the quality of microstructure changes and the improvement of conditions and mechanical strength using the pressing method for aluminum alloy (6xxx) in an angular form is investigated. In this way the prepared forms have two square and circular cross sections and the samples were pressed through the angular pass only one time. The results of the studies showed that by pressing the samples, the structure was improved and uniform microstructure achieved. In the meantime, the samples with a circular cross-section showed better conditions of the effects of work hardening and structural improvement. Manuscript profile
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  5 - Prediction of forging force and barreling behavior in isothermal hot forging of AlCuMgPb aluminum alloy using artificial neural network
  hamidreza Rezaei Ashtiani p shahsavari
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  6 - Plastic deformation of 7075 Aluminum Alloy using Integrated Extrusion-Equal Channel Angular Pressing
  mehdi shaban sahel gozalzadeh beitallah eghbali
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  7 - Study of Mechanical Properties of 7075 Aluminum Alloy Due to Particle Size Reduction due to Constrained Groove Pressing CGP Process
  Shahin Heidari Ahmad Afsari
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  8 - Experimental Investigation of One-pass and Two-pass Friction Stir Welding Process of Aluminum Alloy 6061 with and without Copper Foil
  Qadarat Mohammad Jassim Al-Issawii Maziar Mahdipour Jalilian Mahdi Karami Khorramabadi
  In this research, two methods of conventional Friction Stir Welding (FSW) and two-pass friction stir welding have been used to weld AA6061-T6 alloy parts with a copper interlayer (copper foil. Based on the results, it was determined that the number of welding passes, th More

  In this research, two methods of conventional Friction Stir Welding (FSW) and two-pass friction stir welding have been used to weld AA6061-T6 alloy parts with a copper interlayer (copper foil. Based on the results, it was determined that the number of welding passes, the presence or absence of copper foil as an interlayer, the number of welding passes, the direction of tool rotation and the direction of tool movement in the second pass strongly affect the strength and ductility of FSW. According to the results, the highest tensile strength and ductility belong to TP-D(Two-Pass, type D), TP-B(Two-Pass, type B), TP-C(Two-Pass, type C), TP-A(Two-Pass, type A), CF-Cu and CF(Conventional FSW) samples, respectively. The mentioned samples have growth of 21, 29, 45, 36 and 58% respectively compared to the CF sample. The highest strength growth was related to the TP-D sample, which experienced a 58% increase in tensile strength compared to the CF sample. The tensile strength efficiency of this sample is 89.3% compared to the base metal. The highest increase in ductility was related to the TP-D sample, which experienced a 35% increase in ductility compared to the CF sample. The ductility efficiency of this sample is 81.1% compared to the base metal. Manuscript profile
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  9 - Evaluation of the Cryogenic Effect on Friction Stir Processed AA7075/Si Matrix Nanocomposites
  Navid Molla Ramezani Behnam Davoodi
  Friction-stir processing is a green manufacturing process for surface composite fabrication and surface modification. To achieve this critical goal, the type of cooling and lubrication are of great importance. Therefore, in this paper, the cryogenic effects were investi More

  Friction-stir processing is a green manufacturing process for surface composite fabrication and surface modification. To achieve this critical goal, the type of cooling and lubrication are of great importance. Therefore, in this paper, the cryogenic effects were investigated on friction-stir processing (FSP) tool wear and surface quality of an aluminum matrix nanocomposite. Silicon carbide (SiC) nanopowder was used as the reinforcing phase. The effects of cooling strategy and tool rotation speed on the tool wear, microhardness, surface roughness, and energy dispersive spectroscopy (EDS) analysis were studied. The cooling procedure was conducted under dry and cryogenic conditions. Additionally, the rotation speed was set at three levels, while other parameters were kept constant. The FSP tools were examined under a scanning electron microscope, and the wear mechanisms were investigated under different conditions. The results showed that tool wear, surface roughness, and microhardness were improved under cryogenic conditions compared to air conditions. Furthermore, in the presence of liquid nitrogen, the metal matrix composite did not exhibit any microstructural defects, such as micro-cracks. Energy dispersive spectroscopy analysis also demonstrated that SiC had better penetration into the base material under cryogenic conditions compared to dry conditions. Manuscript profile
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  10 - Experimental Investigation of the Effect of Using Tools with Tapered Pins in Friction Stir Welding (FSW) of AA6061-T6 Aluminum Alloy
  Saleh Al Khatour Maziar Mahdipour Jalilian Mahdi Karami Khorramabadi
  The present study investigated the effect of using tools with tapered pins in Friction Stir Welding (FSW) of AA6061-T6 aluminum alloy. Two techniques named conventional FSW and Refill Friction Stir Welding (RFSW) were used for this purpose. Five tools with different tap More

  The present study investigated the effect of using tools with tapered pins in Friction Stir Welding (FSW) of AA6061-T6 aluminum alloy. Two techniques named conventional FSW and Refill Friction Stir Welding (RFSW) were used for this purpose. Five tools with different tapered angles (0, 5, 10, 15, and 20 degrees) were used. To study the mechanical properties, tensile, three-point bending, and Vickers microhardness tests were performed. Macrographic and microstructural tests were also used to investigate the metallurgical properties of the welded samples. Based on the results, it was found that the key factors determining the ductility and strength of the welded specimens are the type of welding process (conventional FSW or RFSW) and the geometry of the tool pin (straight or tapered pin). Furthermore, it was found that all specimens welded by RFSW have higher tensile strength and elongation than the samples welded by conventional FSW. Manuscript profile
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  11 - Evaluation of Microstructure and Mechanical Properties of Friction Stir Lap Welded 6061 Aluminium Alloy at various welding speeds
  فرهاد غروی ایمان ابراهیم زاده علی سهیلی
  In this research the AA 6061-T6 aluminium alloy plates were welded by friction stir lap welding method. The effect of welding speeds on micro- and macro-structures and mechanical properties was investigated. The welding process was conducted by welding speed in the rang More

  In this research the AA 6061-T6 aluminium alloy plates were welded by friction stir lap welding method. The effect of welding speeds on micro- and macro-structures and mechanical properties was investigated. The welding process was conducted by welding speed in the range 20-60 mm/min at constant rotation speed of 1000 rpm. The results showed that with increasing of welding speed, tensile shear strength and joint efficiency were increased from about 126 to 132 MPa and from about 40.6 to 42.5 (%), respectively. Although average micro-hardness of the weld nugget zone (WNZ) rather than the heat affected zone (HAZ) were increase with increasing welding speed, the average grain size in the WNZ and in the HAZ was decreased from about 43 to 32 µm and from about 99 to 87 µm, respectively. Due to increasing welding speed, the EPT with an increase in welding speed the hooking and thinning defects were gradually restricted from the WNZ to the WNZ/TMAZ interface. The fracture mode within the highest tensile shear strength joints was denoted as plate separation along the hook throughout the stir zone. Manuscript profile
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  12 - Investigation of effect of tool geometry on formation of common defects, and mechanical properties of 5456 Aluminum alloy, in Friction Stir Lap Welded process
  MOHAMMADREZA NADERI محمد علی صفرخانیان امیر حسین کوکبی امین عبداله زاده
  Friction stir welding is suitable for joining series 5000 alloys because no fusion welding problems arise for the alloys in this process. In this project, the effect of tool geometry on mechanical properties and formation of common defects in FSW such Kissing Bond defec More

  Friction stir welding is suitable for joining series 5000 alloys because no fusion welding problems arise for the alloys in this process. In this project, the effect of tool geometry on mechanical properties and formation of common defects in FSW such Kissing Bond defect and Hooking was investigated. Specimens were welded with three pin, that is, Cone with stair (stair at intersection of two sheets), frustum, and Tri-flute (rotating speeds: 650 , 500 rpm / welding speeds: 50, 25 mm/min). First, the macrostructure and microstructure of weld sections was investigated, and afterwards tensile shear test from retreating side as well as micro hardness test were examined. The results show that from among three pins which were used in this project, Tri-flute is the best pin simply because the specimens which were welded with this pin not only had an appropriate Hooking height, but also Kissing Bond was not destructive in these specimens. Manuscript profile
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  13 - Modelling and prediction of the yield strength of 6061 aluminum alloy processed by accumulative roll bonding (ARB)
  Mohammad Reza Rezaei Mohammad Reza Toroghinejad Fakhreddin Ashrafizadeh
  In the present research, a quantitative approach was employed to investigate the mechanical properties of ultrafine grained 6061 aluminum alloy after different cycles of accumulative roll bonding (ARB) process. In this regard, the yield strength of samples was modelled More

  In the present research, a quantitative approach was employed to investigate the mechanical properties of ultrafine grained 6061 aluminum alloy after different cycles of accumulative roll bonding (ARB) process. In this regard, the yield strength of samples was modelled based on the microstructural parameters extracted from x-ray diffraction (XRD) patterns and micrographs using corresponding mathematical equations. The microstructural features and mechanical properties of samples were analyzed by transmission electron microscopy (TEM) and uniaxial tensile test, respectively. The density of stored dislocations was calculated from XRD patterns by famous Williamson-Hall equation. Microstructural characterizations revealed that ultrafine grains as well as non-shearable precipitates were formed gradually by increasing the number of ARB cycles. The yield strength of ARBed samples was increased by increasing the number of cycles and reached to 278 MPa after third cycle. The grain refinement mechanism was the dominant strengthening mechanism in one cycle ARBed sample, contributing a strength increment estimated to about 95 MPa and its positive role was increased continuously by increasing the number of cycles. Also, the experimentally determined yield strength was in reasonable agreement with theoretically determined yield strength from strengthening mechanisms. Manuscript profile
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  14 - Effect of Shoulder Surface Angle of Tool on Joint Properties in Friction Stir Welding of 5052 Aluminium Alloy
  فرهاد غروی
  Friction stir lap welding of 5052 aluminum alloy was performed in the present research, and lap joints were fabricated by rotational speed of 1450 rpm and welding speed of 63 mm/min. Three tools with different shoulder surface angle (i.e. 0, 5, and 10 degrees) were desi More

  Friction stir lap welding of 5052 aluminum alloy was performed in the present research, and lap joints were fabricated by rotational speed of 1450 rpm and welding speed of 63 mm/min. Three tools with different shoulder surface angle (i.e. 0, 5, and 10 degrees) were designed and used. The effect of shoulder surface angle on joint properties was studied by optical microscopy and tensile-shear test. The results showed that only at angle of shoulder surface of zero-degree a continuous channel-like void was formed in the advancing side near the nugget zone and extended along the welding direction. The lap joints with the highest fracture strength has the smallest hook size, and is fractured at fraying surface rather than in the hook defect during tensile-shear test. Hook size and effective plate thickness (EPT) decreased from 4.5 to 2 and 2.25 to 1, respectively, as the angle of shoulder surface increased while the highest tensile-shear properties were obtained around 4650 N/mm at angle of shoulder surface of 10 degrees. Manuscript profile
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  15 - Investigation of Microstructure, Hardness and Intermetallic Compound in Friction stir Welding of AA6065 Aluminum Alloy to Copper
  مجید الیاسی Rahim Narimani Mortza Hosseinzadeh Hamed Aghajani Derazkola
  In this study, metallurgical properties lap joint of pure copper and 6065 aluminum alloy with friction stir welding technique were investigated. To purpose the metallurgical properties of joint optical microscopy, X-ray diffraction analysis (XRD), energy dispersive X-ra More

  In this study, metallurgical properties lap joint of pure copper and 6065 aluminum alloy with friction stir welding technique were investigated. To purpose the metallurgical properties of joint optical microscopy, X-ray diffraction analysis (XRD), energy dispersive X-ray (EDS) and Vickers hardness junction of micro gauge were used. The results shows that due to the direct contact between aluminum alloy and tool shoulder, the microstructure change of AA6065 was more than copper. With increasing tool rotation speed the microstructure size of AA6065 and copper became smaller and with increasing linear speed and cooling rate, the microstructure size of base material became more. The results shows that the structured layers were formed in stir zone which with increasing heat generation they geometry became thinner and stretcher. The combination of base materials in high tool rotation and low travelling speed caused the CuAl2 and Cu9Al4 intermetallic compounds were formed in base metal interface. For changes in microstructure size and formation of intermetallic compounds, the hardness of stir zone was more than other area of joint. The maximum hardness of joint area was 111 Vickers which allocated to the joint that welded with 1130 rpm and 24mm/min tool speed. Manuscript profile
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  16 - Aluminum alloy (АМГ6М) joining by two processes of friction-stir and non-consumable Tungsten electrode welding and comparison of their mechanical and microstructure properties
  Aliasghar Torabi Tahmineh Ahmadi Afshin Shirali Mohammadreza Khanzadeh ghareshiran Majid Taghian
  The purpose of this research is to investigate the possibility of replacement of arc welding under shielding gas with non-consumable Tungsten electrode (TIG) of Al АМГ6М alloy by friction stir welding (FSW). In this regard, after applying primary parameters for both wel More

  The purpose of this research is to investigate the possibility of replacement of arc welding under shielding gas with non-consumable Tungsten electrode (TIG) of Al АМГ6М alloy by friction stir welding (FSW). In this regard, after applying primary parameters for both welding processes to obtain optimum parameters, the prepared samples were characterized with Tension, bending, radiography, hardness and distortion tests and also microstructure evaluation. The results of this study showed that the grain size of welding zone of TIG and FSW processes are 14 and 6 µm respectively, which are smaller than the base metal with 30 µm in size. The ultimate tensile strength of the FSW joints in the parallel to rolling direction and in the vertical direction with welding line is much more higher than TIG joints; 364 Mpa versus 278 Mpa. The reduction of microhardness in the welding zone for both process FSW and TIG have been in a range. The amount of distortion measured in the FSW was one-fourth of these values in TIG. The result of bending test of the FSW sample from the plane like to the results of the base metal is crack free. Therefore, in order to improve the mechanical and metallurgical properties, as well as to reduce weld joints distortion in aluminum structures, FSW was considered an appropriate alternative to the replacement of the arc welding under shielding gas with non-consumable tungsten electrode. Manuscript profile
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  17 - The Investigation of the Corrosion Resistance of Al/Alumina Composites Fabricated Via ARB Process
  Ali Jahangiri Sadri Mohammad Heydari Vini Saeed Daneshmand
  Metal matrix composites, high mechanical performance, usability at high temperatures, good wear resistance and low creep rate. This type of composite manufacturing method is very important. Among manufacturing processes, ARB process as a method of applying severe plasti More

  Metal matrix composites, high mechanical performance, usability at high temperatures, good wear resistance and low creep rate. This type of composite manufacturing method is very important. Among manufacturing processes, ARB process as a method of applying severe plastic deformation is used on the sheets. In this study 5Wt. % Al/alumina composites fabricated by accumulative roll bonding process up to eight steps using Al1060. Microstructure, mechanical properties and corrosion behavior of the composite were studied by scanning electron microscopy (SEM), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), measurement in 3.5wt% NaCl solution. Corrosion behavior of the composite revealed a considerable improvement in the main electrochemical parameters, as a result of enhancing influence of cold rolling. Also, the electrochemical experiments showed that corrosion resistance of samples increasing with increasing the number of ARB cycles. After 8- cycle ARB have a low corrosion density in comparison with high corrosion density of annealed specimens. Manuscript profile
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  18 - بررسی پارامترهای حاکم و بهینه‌سازی سختی مذاب در حال انجماد آلیاژ آلومینیوم A380 تولید شده به روش ارتعاش مکانیکی
  سعید احترامیان حقیقی امین کلاه دوز مجید کریمیان
  استفاده از آلیاژهای آلومینیم در صنایع مختلف به ویژه اتومبیل‏سازی برای داشتن سازه­ای با وزن کمتر رو به افزایش است. استفاده از فرآیند شکل‏­دهی نیمه جامد که علاوه بر تغییر در ریزساختار که باعث بهبود مشخصات مکانیکی می­شود، می­تواند باعث کاهش حجم مصرف More

  استفاده از آلیاژهای آلومینیم در صنایع مختلف به ویژه اتومبیل‏سازی برای داشتن سازه­ای با وزن کمتر رو به افزایش است. استفاده از فرآیند شکل‏­دهی نیمه جامد که علاوه بر تغییر در ریزساختار که باعث بهبود مشخصات مکانیکی می­شود، می­تواند باعث کاهش حجم مصرفی ماده تولیدی شده و در نهایت به بهبود نهایی وزن سازه منجر شود. در این مقاله بهینه­سازی پارامترهای حاکم در یکی از روش­های شکل­دهی نیمه­جامد به نام ارتعاش مکانیکی پرداخته می­شود. آلیاژ مورد بررسی در این تحقیق آلیاژ آلومینیم با گرید A380 می­باشد. پارامترهای مورد بررسی شامل مقدار و زمان اعمال تنش برشی و دمای ریخته‏گری است و هدف به دست آمدن بیشترین سختی برای نمونه­های تولیدی است. در این راستا نمونه‏هایی از مذاب‏های آلومینیم  A380 تحت فرکانس­های ارتعاش متفاوت و دماهای ریخته‏گری متفاوت و زمان­های ارتعاش قرار گرفت و سپس در نهایت با استفاده از بهینه‏سازی به کمک الگوریتم ژنتیک، بهترین نتیجه بدست آمد. بهترین سختی در نمونه­های تولیدی حدود 80 برینل به دست آمد. همچنین نتایج نشان داد که دمای مذاب بیشترین تاثیر را بر روی سختی دارد و با افزایش فرکانس  زمان آن باعث می­شود دانه­ها به سمت کروی شدن بروند و سختی قطعه افزایش یابد Manuscript profile