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Mechanical Considerations
Published in Roger Messenger, Homayoon “Amir” Abtahi, Photovoltaic Systems Engineering, 2017
Roger Messenger, Homayoon “Amir” Abtahi
Alloys in the 6xxx alloy series, which use magnesium and silicon as alloying elements, possess a combination of properties including corrosion resistance, which make them well suited for structures and architectural applications. They are also commonly used for marine applications, truck frames and bodies, bridge decks, automotive structures, and furniture. From the 6xxx series, 6061 and 6063 aluminum alloys are often used as structural members for PV arrays. 6061 aluminum contains 1.0% magnesium and 0.6% silicon. For the same tempering during fabrication, 6061 aluminum alloy has higher tensile strength than 6063 aluminum, which contains 0.7% magnesium and 0.4% silicon [3]. However, 6063 aluminum has better resistance to corrosion.
Experimental and Numerical Investigation on Flow Boiling in a Small Semi-circular Channel of Plate Once-Through Steam Generator
Published in Heat Transfer Engineering, 2021
Xiaofei Yuan, Lixin Yang, Zemin Shang
The test section is represented in Figure 2(a). The horizontal experimental piece is 880 mm long, 70 mm wide, and 64 mm high. The diameter of semi-circular channel is 3 mm. The effective heating length is 700 mm and hydraulic diameter Dh of semi-circular channel is 1.83 mm. Twenty-eight holes of heat rods are processed in the 6063 aluminum alloy foundation to provide uniform heat flux. The density specific heat and thermal conductivity of 6063 aluminum alloy are 2690 kg/m3, 900 J/(kg·K), and 201 W/(m·K), respectively. Two slots with a width of 5 mm and a depth of 39 mm are processed near the inlet and outlet so as to prevent axial heat transfer loss. A total of 28 thermocouples are arranged with 4 thermocouples every 100 mm to measure the wall temperature of 7 points along the path. In order to reduce heat loss, the glass fiber cotton of low conductivity covered with the outer surface of the test section.
Corrosion behavior of aluminum alloy in sulfur-associated petrochemical equipment H2S environment
Published in Chemical Engineering Communications, 2023
Xingyan Cao, Yawei Lu, Zhirong Wang, Haoyue Wei, Longtao Fan, Rongrong Yang, Wenjie Guo
Figure 4 shows the macro-corrosion morphologies of the three types of aluminum alloy samples in the gas-phase environment of the H2S saturated solution. As shown in Figure 4, the corrosion product on the sample surface was white, with a trace amount of a yellow-gray material. The corrosion products were primarily aluminum oxides, such as Al(OH)3. This indicates that the three types of aluminum alloy samples underwent significant corrosion. The 6061 aluminum alloy sample exhibited more severe corrosion, and the amount of the white-yellow-gray material was more significant. Compared with the 3A21 and 6061 samples, the 6063 aluminum alloy sample presented a higher corrosion resistance.
Investigation and optimization of machining through hole by abrasive water jet machining in AA6063/Bagasseash/TiN hybrid composites
Published in Materials and Manufacturing Processes, 2021
K Ravi Kumar, Nisha Soms, S. Selvakumar, V.S. Sreebalaji
Literature study reveals that Abrasive Water Jet Machining is a nontraditional machining process in which material is removed by the erosion of high-velocity water jet containing abrasive particles. Traverse velocity, particle density, mass flow rate, standoff distance, water jet pressure, impingement angle are the major parameters influencing AWJ machining. The influence of process parameters on AWJM of aluminum composites was studied by researchers. Few studies were carried to study the influence of parameters on aluminum hybrid composites. Furthermore, there is no literature available to study the influence of AWJM parameters on hybrid aluminum AA6063 composites. Hence an attempt was made to study the influence of parameters on the AWJM behavior of AA6063/TiN/Bagasse ash composites. AA 6063 aluminum alloy commonly referred to as architectural alloy contains Mg and Si as the major alloying elements and has good mechanical and heat treatable properties. AA6063 alloy normally used in intricate extrusions finds applications in automotive and building industries due to its excellent formability, good corrosion resistance, and relatively low cost is used in this study. Sugarcane bagasse ash, a multi-process by-product obtained from sugarcane carrying elements like SiO2, Al2O3 is used as reinforcement in addition to Titanium Nitride (TiN) particles. Composites were fabricated using the low-cost stir casting technique. This study focuses on the influence of AWJM parameters on the surface roughness and material removal rate of Al/TiN/Bagasse ash hybrid composites. Analysis of variance and response surface methodology was employed to develop mathematical models and to analyze the influence of parameters. Desirability based approach was employed to evaluate the optimum abrasive water jet machining parameters and the mechanisms were analyzed by Scanning Electron Microscopy (SEM).