A5067048838- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Additive Manufacturing and 3D Printing Technologies
- Welding Techniques and Residual Stresses
- Titanium Alloys Microstructure and Properties
- Manufacturing Process and Optimization
- High Temperature Alloys and Creep
- High-Temperature Coating Behaviors
- Glass properties and applications
- Aluminum Alloys Composites Properties
- Metallic Glasses and Amorphous Alloys
- Advanced Semiconductor Detectors and Materials
- Advanced materials and composites
- Advanced Welding Techniques Analysis
- Aluminum Alloy Microstructure Properties
National Research Council Canada
2022-2024
McGill University
2019-2023
Middle East Technical University
2017-2018
Abstract Equiatomic CoCrFeMnNi high entropy alloy (HEA) powder was processed by laser bed fusion (LPBF) additive manufacturing (AM). The properties of the spherical pre-alloyed were characterized and its processability using LPBF AM systematically investigated through volumetric energy density (VED) based on surface roughness, defects (micro-cracks porosity) densification. After optimization, processing at a VED 104 J/mm 3 achieved highly dense crack-free vertical horizontal test specimens...
The present work investigates the effectiveness of two heat treatment cycles-solution + aging (STA) and direct (DA)-on optimizing microstructure enhancing mechanical properties 18Ni-300 maraging steel (300 MS) produced by additive-subtractive hybrid manufacturing (ASHM). STA led to a fully martensitic with minor remnants cellular substructures associated solidification conditions in ASHM. DA resulted some reverted austenite partial dissolution morphologies into shorter fragments. Despite...
This study reports the crack-free fabrication of a new high gamma prime precipitation hardened Ni-based superalloy by Laser Powder Bed Fusion (LPBF) process. In as-built condition, scanning electron microscopy and backscattered diffraction analysis indicated presence elongated columnar grains with an orientation along 〈1 0 0〉 direction. Following sub-solvus heat treatment cycle determined using Thermo-Calc software, microstructure was observed orientation. High-resolution microscope revealed...
This study investigated the application of an in envelope additive/subtractive (LPBF) manufacturing method (Matsuura LUMEX-Avance-25) to fabricate IN718 benchmarking coupons. The coupons were then examined comprehensively for surface finish both with and without high-speed micro-machining. microstructure manufactured was thoroughly as-fabricated condition following three different standard one non-standard post-processing heat treatments. As built revealed columnar grain morphology mainly...
An overview of the additive/subtractive hybrid manufacturing (ASHM) research on three heat resisting materials – 18Ni-300 maraging steel, 316L stainless and Inconel 718 (hereinafter 18Ni-300, IN718) is provided to bridge key knowledge gaps establish respective process-microstructure-property relationships. The results examine validating final surface roughness properties in as-built machined conditions terms linear areal parameters. Microscopic observations are also detailed identify...
The present study focuses on advancing one of the most popular AM techniques, namely, laser powder bed fusion (LPBF) technology, which has ability to produce complex geometry parts with minimum material waste but continues face challenges in minimizing surface roughness. For this purpose, a novel hybrid manufacturing applies single setup (in-envelope) both LPBF technology and high-speed machining, was examined research for fabrication tensile specimens three different finish conditions:...
This study presents the successful development of a new high γ′ nickel-based superalloy, LW 4280, using laser powder bed fusion. Microstructural analysis revealed absence precipitates in as-built condition. A designed sub-solvus heat treatment resulted bimodal distribution precipitates. The heat-treated specimens displayed yield strength 1038, 904, 690, 500, 333, 264, and 169 MPa, ultimate tensile 1455, 1055, 807, 621, 424, 329 205 elongation 26%, 17%, 13%, 24%, 19% 30% at 21, 760, 871, 927,...
This study reports the successful crack-free fabrication of non-weldable high γ’ Ni-superalloy IN738 by laser powder bed fusion. The as-fabricated texture was composed columnar grains with preferred orientation along <100> direction. Scanning electron microscopy and X-ray diffraction analysis revealed presence M(Ti, Ta, W, Mo, Nb)C M(Cr, W)23C6 carbides grain boundaries. A heat treatment used for castings yielded a bimodal distribution precipitates primary volume 25% size ~ 226 nm secondary...