A modular optical honeycomb breadboard realized with 3D-printable building bricks and industrial aluminum extrusions

AbstractThe present study investigates the effect of the solidification strategy for AA 6063 alloy on the surface appearance of anodized extrusions. The microstructure of the samples was analyzed using both light optical microscopy and scanning electron microscopy. Results show that if heavy segregation occurs from rapid solidification, coarse Mg2Si particles form, thus reducing the potential for precipitation strengthening by the finer β-Mg2Si developed in the solid state. Differentially-strained regions formed during hot extrusion induce differences in particle size for magnesium silicide (Mg2Si) precipitates. Anodizing generates surface roughness due to Mg2Si particle dissolution and AlFeSi decohesion, which is related to both particle size and deformation. During anodizing, an oxide layer forms on the surface of the extruded products, which can lead to streak formation, usually a subject of rejection due to unacceptable heterogeneous reflectivity.

Download Full-text

Mössbauer Investigation of ALFe and ALFeSi Phases in Specially Produced Aluminum Alloys and in Industrial Aluminum

Industrial Applications of the Mössbauer Effect ◽

10.1007/978-1-4613-1827-9_11 ◽

1986 ◽

pp. 201-216

Author(s):

Sàndor Nagy ◽

Attila Vértes ◽

Zoltàn Homonnay ◽

Lajos Murgàs ◽

Tibor Turmezey ◽

...

Keyword(s):

Aluminum Alloys ◽

Industrial Aluminum

Download Full-text

Dynamic Decision Model for Amount of AlF3 Addition in Industrial Aluminum Electrolysis

Proceedings of the 3rd International Conference on Mechatronics, Robotics and Automation ◽

10.2991/icmra-15.2015.152 ◽

2015 ◽

Cited By ~ 1

Author(s):

Shuiping Zeng ◽

Fuwei Cui

Keyword(s):

Decision Model ◽

Aluminum Electrolysis ◽

Dynamic Decision Model ◽

Industrial Aluminum

Download Full-text

Decipher Ultrasonic Signals from Defects in Thick Aluminum Extrusions to Identify Type and Origin of Defects

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.875.248 ◽

2021 ◽

Vol 875 ◽

pp. 248-255

Author(s):

Lubaba Batool ◽

Zukhruf Nawaz ◽

Irsa Jahangir ◽

Zeeshan Abbasi ◽

Anjum Tauqir

Keyword(s):

Ultrasonic Testing ◽

Quality Criteria ◽

Ultrasonic Signals ◽

Eds Analysis ◽

Aluminum Extrusions ◽

Metallographic Preparation ◽

Microscopic Studies ◽

Electron Microscopes ◽

Scanning Electron Microscopes ◽

Defect Morphology

Manufacturing of thick seamless pipes of age-hardenable aluminum alloys are a specialized technology since their application is limited to specific hi-tech areas. Quality criteria for their inspection are propriety items of the very few production facilities that develop these criteria in-house. Present study relates ultrasonic signals reflecting back from non-continuities in the thickness of seamless pipes with their microstructural features. Detailed study of defects leads to the source of their formation and will ultimately help to systematically control them. Signals from ultrasonic testing trace defects as UT waves reflect back from discontinuities in the material. Defective sections of seamless pipes were cut with precision to reveal the defects. The sectioned surfaces were subjected to metallographic preparation and revealed defects were studied using Optical and Field Emission Scanning Electron Microscopes (FESEM). Defects are grouped based on the shape of UT signals as well as the defect morphology as revealed by microscopic studies. Most of the observed cracks are found to grow in the direction of extrusion. Energy Dispersive Spectroscopy (EDS) analysis was conducted to determine the composition of inclusions in the vicinity of the defects. Data from elemental analysis is used to identify the potential sources. The study recommends measures to control the defects and improve the yield.

Download Full-text