Browsing NTNU Open by Author "Akhtar, Shahid"
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Aluminizing of plain carbon steel: Effect of temperature on coating and alloy phase morphology at constant holding time
Isiko, Maureen Bangukira (Master thesis, 2012)Aluminized steel possesses excellent physical, chemical and mechanical properties as compared to plain carbon steel. This type of steel has found application in high temperature, oxidizing and corrosive environments. In ... -
Evaluation of Filtration Efficiency of Ceramic Foam Filters (CFF) Using a Hydraulic Water System
Hassanabadi, Massoud; Akhtar, Shahid; Bilek, Petr; Aune, Ragnhild E. (Journal article; Peer reviewed, 2018)The filtration efficiency of Ceramic Foam Filters (CFFs) of grades 50 and 65 has been quantitatively evaluated using a hydraulic water system. Distilled water seeded with Polystyrene Microsphere particles with a distribution ... -
Grain Refinement of Commercial EC Grade 1370 Aluminium Alloy for Electrical Applications
Hassanabadi, Massoud; Akhtar, Shahid; Arnberg, Lars; Aune, Ragnhild E. (Journal article; Peer reviewed, 2018)The purpose of the present study was to investigate the effect of different grain refiners’ additions on structure and electrical conductivity of commercially electrically conductive (EC) grade 1370 aluminium alloy. A ... -
How Slight Solidification Rate Variations within Cast Plate Affect Mechanical Response: A Study on As-Cast A356 Alloy with Cu Addition
Di Giovanni, Maria Teresa; Cerri, Emanuela; Saito, Takeshi; Akhtar, Shahid; Åsholt, Petter; Li, Yanjun; Di Sabatino Lundberg, Marisa (Journal article; Peer reviewed, 2018)The present work investigates a narrow range of secondary dendrite arm spacing (SDAS), in an as-cast A356 alloy with and without copper (Cu) additions. Cu was added to the base A356 alloy melt to reach the target concentration ... -
Hydrogen Porosity in Al-Si Foundry Alloys
Akhtar, Shahid (Doktoravhandlinger ved NTNU, 1503-8181; 2010:3, Doctoral thesis, 2010)Aluminium alloys based on the aluminium-silicon system are popular for automotive and aerospace applications, thanks to their high strength to weight ratio, excellent castability, and corrosion resistance. Microporosity ... -
Study of controllable inclusion addition methods in Al melt
Yang, JiaWei; Bao, Sarina; Akhtar, Shahid; Li, Yanjun (Journal article; Peer reviewed, 2019)Ceramic Foam Filtration (CFF) is a widely used technique to remove inclusions from Al melt. To ensure sufficient inclusions in the melt during the grain refiners/filtration interaction, inclusion addition methods, such as ... -
Verification of Experimentally Determined Permeability and Form Coefficients of Al2O3 Ceramic Foam Filters (CFF) at High and Low Flow Velocity Using a CFD Model
Hassanabadi, Massoud; Kennedy, Mark W.; Akhtar, Shahid; Aune, Ragnhild E. (Journal article, 2018)Filtration using Ceramic Foam Filters (CFFs) is a method widely used to separate inclusions from molten aluminium. In the present work, the specific permeability and form drag coefficients of nominal 50 mm thick commercial ...