3D printing of geopolymer-based concrete for building applications

Rehman, Asif Ur; Sglavo, Vincenzo M.

doi:10.1108/rpj-09-2019-0244

Cited by 31 publications

(24 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model was able to predict results with 8% mean absolute deviations. Various analytical models have been presented to estimate temperature distribution within deposited coating using non-Fourier and two-temperature model techniques [115][116][117][118][119]. These models can be used for process optimization by linking them with optimization software or an artificial neural network before performing actual experiments [120].…”

Section: Modelling Approachesmentioning

confidence: 99%

Laser Coatings via State-of-the-Art Additive Manufacturing: A Review

et al. 2021

View full text Add to dashboard Cite

Ceramics and ceramic-reinforced metal matrix composites (CMMCs) demonstrate high wear resistance, excellent chemical inertness, and exceptional properties at elevated temperatures. These characteristics are suitable for their utilization in biomedical, aerospace, electronics, and other high-end engineering industries. The aforementioned performances make them difficult to fabricate via conventional manufacturing methods, requiring high costs and energy consumption. To overcome these issues, laser additive manufacturing (LAM) techniques, with high-power laser beams, were developed and extensively employed for processing ceramics and ceramic-reinforced CMMCs-based coatings. In respect to other LAM processes, laser melting deposition (LMD) excels in several aspects, such as high coating efficiency and lower labor cost. Nevertheless, difficulties such as poor bonding between coating and substrate, cracking, and reduced toughness are still encountered in some LMD coatings. In this article, we review recent developments in the LMD of ceramics and CMMCs-based coatings. Issues and solutions, along with development trends, are discussed and summarized in support of implementing this technology for current industrial use.

show abstract

Section: Modelling Approachesmentioning

confidence: 99%

Laser Coatings via State-of-the-Art Additive Manufacturing: A Review

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Additive manufacturing (AM) offers customizable design, decreased processing time, and the possibility of creating complex geometries. It has garnered a lot of attention from advanced technology applications [ 1 ], aerospace [ 2 ], biomedical [ 3 , 4 ], and construction [ 5 , 6 ]. Laser powder bed fusion (LPBF) is among the most prominent AM innovations with prevalent benefits, considerably reduced structural constraints, good repeatability, and timely delivery [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L

Rehman

Pıtır²,

Salamcı

2021

Materials

Self Cite

View full text Add to dashboard Cite

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, however, the flow in the melt pool has not been described thoroughly in 3D. Here, we provide full-field mapping and flow measurement of melt pool dynamics in laser powder bed fusion, through a high-fidelity numerical model using the finite volume method. The influence of Marangoni flow, evaporation, as well as recoil pressure have been included in the model. Single-track experiments were conducted for validation. The temperature profiles at different power and speed parameters were simulated, and results were compared with experimental temperature recordings. The flow dynamics in a single track were exposed. The numerical and experimental findings revealed that even in the same melting track, the melt pool’s height and width can vary due to the strong Marangoni force. The model showed that the variation in density and volume for the same melting track was one of the critical reasons for defects. The acquired findings shed important light on laser additive manufacturing processes and pave the way for the development of robust, computational models with a high degree of reliability.

show abstract

“…Additive manufacturing (AM) provides customized designs, reduced preparation time, and the ability to create complicated shapes. Many advanced technological applications [1] such as aerospace [2], biomedicine [3,4] and architecture [5,6] have considerable interest in it. Laser powder bed fusion (LPBF) is one of the most widely used additive manufacturing (AM) technologies because of its many advantages, which include significantly reduced structural limitations, high reproducibility, and on-time delivery [7].…”

Section: Introductionmentioning

confidence: 99%

Laser Powder Bed Fusion (LPBF) of In718 and the Impact of Pre-Heating at 500 and 1000 °C: Operando Study

Rehman

Pıtır²,

Salamcı

2021

Materials

Self Cite

View full text Add to dashboard Cite

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 present the melt pool flow of the entire melt pool in 3D using mesoscopic simulation models. The physical processes occurring within the melt pool are pinpointed. The flow patterns throughout the same are exposed and measured. Moreover, the impact of pre-heating at 500 and 1000 °C has been described. The study findings offer insights into LPBF. The findings presented here are critical for comprehending the LPBF and directing the establishment of improved metrics for process parameters optimization.

show abstract

3D printing of geopolymer-based concrete for building applications

Cited by 31 publications

References 16 publications

Laser Coatings via State-of-the-Art Additive Manufacturing: A Review

Laser Coatings via State-of-the-Art Additive Manufacturing: A Review

Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L

Laser Powder Bed Fusion (LPBF) of In718 and the Impact of Pre-Heating at 500 and 1000 °C: Operando Study

Contact Info

Product

Resources

About