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This Author published in this journals
All Journal Indonesian Journal of Electrical Engineering and Computer Science ASEAN Journal for Science and Engineering in Materials
Raghad Ahmed Al-Aloosi
University of Baghdad
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Remote laser welding simulation for aluminium alloy manufacturing using computational fluid dynamics model Raghad Ahmed Al-Aloosi; Zainab Abdul-Kareem Farhan; Ahmad H. Sabry
Indonesian Journal of Electrical Engineering and Computer Science Vol 27, No 3: September 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v27.i3.pp1533-1541

Abstract

The process of remote laser welding is simulated in this study to identify the keyhole-induced porosity generation mechanisms and keyhole. Three processes are simulated and discussed: laser power levels, laser-beam shaping configurations, and laser keyhole process. The simulation finding reveals that pore development is caused by strong melt flow behind the keyhole. As verification, the equivalent experimental test is also carried out. According to the findings, a welding speed with a high level helps to keep the keyholes released and prevents the flow of strong melt; a big advanced leaning-angle also provides inactive molten pool flow, making it difficult for bubbles to float to the backside of the molten pool. The conclusions of this study offer crucial insight into the method of porosity of aluminum (Al) alloys laser welding, as well as advice on how to avoid keyhole-induced porosity. It is also obtained that a smaller laser beam with constant power raises the velocity, welding pool depth, and liquid metal temperature.
ASTM F75 Alloys: A Systematic Review of Microstructural Characteristics and Manufacturing Advances from Conventional to Laser-Based Techniques with Bibliometric Analysis Raghad Ahmed Al-Aloosi; Wisam T. Abbood; Enas A. Khalid; Wassan S. Abd Al-Sahb; Nazar Kais Al-Karkhi; Oday I. Abdullah; Somer Nacy; Adawiya J. Haider; M. N. Mohammed
ASEAN Journal for Science and Engineering in Materials Vol 6, No 1 (2027): AJSEM: Volume 6, Issue 1, March 2027
Publisher : Bumi Publikasi Nusantara

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Abstract

This study provides a systematic and bibliometric review of ASTM F75 cobalt–chromium alloys, focusing on microstructure and the shift from conventional to laser-based manufacturing. Using combined analytical methods, it evaluates microstructure, mechanical properties, corrosion behavior, and biocompatibility. Results show that laser-based techniques such as LPBF and DMLS produce finer grain sizes (1–10 µm vs. 50–200 µm), leading to improved hardness (20–40%) and tensile strength (15–30%). Despite challenges like residual stress and process optimization, these methods show strong potential for high-performance and sustainable applications.
Co-Authors Adawiya J. Haider Ahmad H. Sabry Enas A. Khalid M. N. Mohammed Nazar Kais Al-Karkhi Oday I. Abdullah Somer Nacy Wassan S. Abd Al-Sahb Wisam T. Abbood Zainab Abdul-Kareem Farhan