Advancing PLA 3D printing with laser polishing: improving mechanical strength, sustainability, and surface quality

RT Mushtaq, A Iqbal, Y Wang, AM Khan, MI Petra - Crystals, 2023 - mdpi.com
Three-dimensional (3D) printing of polylactic acid using the fused filament fabrication
approach is a widely used additive manufacturing method in various fields, despite the …

[HTML][HTML] Full-field mapping and flow quantification of melt pool dynamics in laser powder bed fusion of SS316L

A Ur Rehman, F Pitir, MU Salamci - Materials, 2021 - mdpi.com
Laser powder bed fusion (LPBF) has a wide range of uses in high-tech industries, including
the aerospace and biomedical fields. For LPBF, the flow of molten metal is crucial; until now …

Spatter formation and splashing induced defects in laser-based powder bed fusion of AlSi10Mg alloy: a novel hydrodynamics modelling with empirical testing

A Ur Rehman, MA Mahmood, P Ansari, F Pitir… - Metals, 2021 - mdpi.com
Powder spattering and splashing in the melt pool are common phenomena during Laser-
based Powder Bed Fusion (LPBF) of metallic materials having high fluidity. For this purpose …

Keyhole formation by laser drilling in laser powder bed fusion of Ti6Al4V biomedical alloy: Mesoscopic computational fluid dynamics simulation versus mathematical …

A Ur Rehman, MA Mahmood, F Pitir, MU Salamci… - Nanomaterials, 2021 - mdpi.com
In the laser powder bed fusion (LPBF) process, the operating conditions are essential in
determining laser-induced keyhole regimes based on the thermal distribution. These …

[HTML][HTML] Grain refinement and mechanical properties for AISI304 stainless steel single-tracks by laser melting deposition: Mathematical modelling versus experimental …

MA Mahmood, AC Popescu, M Oane, D Chioibasu… - Results in Physics, 2021 - Elsevier
Many of the significant mechanical properties of stainless steel, including ultimate tensile
strength, yield strength and hardness, the ductile–brittle transition temperature, and …

Laser powder bed fusion (LPBF) of In718 and the impact of pre-heating at 500 and 1000° C: Operando Study

A Ur Rehman, F Pitir, MU Salamci - Materials, 2021 - mdpi.com
The morphology of a melt pool has a critical role in laser powder bed fusion (LPBF).
Nevertheless, directly characterizing the melt pool during LPBF is incredibly hard. Here, we …

Influence of silicon carbide on direct powder bed selective laser process (sintering/melting) of alumina

A Ur Rehman, MA Saleem, T Liu, K Zhang, F Pitir… - Materials, 2022 - mdpi.com
The powder bed selective laser process (sintering/melting) has revolutionised many
industries, including aerospace and biomedicine. However, PBSLP of ceramic remains a …

Laser melting deposition additive manufacturing of ti6al4v biomedical alloy: Mesoscopic in-situ flow field mapping via computational fluid dynamics and analytical …

MA Mahmood, A Ur Rehman, F Pitir, MU Salamci… - Materials, 2021 - mdpi.com
Laser melting deposition (LMD) has recently gained attention from the industrial sectors due
to producing near-net-shape parts and repairing worn-out components. However, LMD …

Printed layers height calibration curve and porosity in laser melting deposition of Ti6Al4V combining experiments, mathematical modelling and deep neural network

MA Mahmood, C Diana, U Sajjad, S Mihai… - Rapid Prototyping …, 2024 - emerald.com
Purpose Porosity is a commonly analyzed defect in the laser-based additive manufacturing
processes owing to the enormous thermal gradient caused by repeated melting and …

Grain-based morphological simulation via fractal theory with experimental verification and corresponding optical properties in laser melting deposition additive …

MA Mahmood, AU Rehman, K Ishfaq… - Applied Mathematical …, 2022 - Elsevier
Laser melting deposition (LMD) stands for a challenging and promising 3D printing
technology to fabricate near-net-shape parts. In this study, a 3D modified fractal model …