Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Effect of annealing on the mechanical properties of pla parts produced by fused filament fabrication
Download
Sencer Aydın Tez.pdf
Date
2021-9-01
Author
Aydın, Sencer
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
404
views
144
downloads
Cite This
Additive manufacturing has become a disruptive technology for the production of load bearing components in a wide range of applications. Fused filament fabrication (FFF) is among the most effective and economical techniques for the printing of polymeric parts. There are numerous thermoplastic materials suitable for FFF. Among these, Polylactic acid (PLA) is a renewable, sustainable and cost-effective alternative. For better utilization of PLA parts produced by FFF, there is a need to understand the structure-property relationships in this system. This thesis investigated the effect of annealing on the mechanical properties of FFF produced parts made of polylactic acid (PLA). The as-printed specimens exhibit an amorphous structure, whereas annealing at elevated temperatures, ranging from 80°C to 140°C for 24 hours resulted in the formation of different crystalline phases. 100°C annealing for 24 hours provided the best results in terms of ductility and strength improvement; the tensile strength increased by 6.5 % and elongation at break increased by 33%. A further increase in the annealing temperature resulted in a decrease in the strength and ductility. In the second part of the thesis, the effect of annealing for different infill ratios were investigated. The 60% infill ratio case with 100 °C annealing showed the best normalized mechanical properties. The findings of the thesis show the importance of the microstructure on the mechanical properties and demonstrate the feasibility of annealing for the process and property optimization of FFF-produced parts.
Subject Keywords
Eklemeli İmalat
,
Eriyik Filament ile İmalat
,
Polilaktik Asit (PLA)
,
Isıl İşlem
,
Mekanik Özellikler
,
Kristalleşme
,
Additive Manufacturing
,
Fused Filament Fabrication
,
Polylactic Acid (PLA)
,
Annealing
,
Mechanical Properties
,
Crystallization
URI
https://hdl.handle.net/11511/93232
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Effect of Heat Treatment on Microstructure and Mechanical Properties of Additively Manufactured 18Ni300 Maraging Steels
Aydın, İbrahim; Yağmur, Aydın; Tirkeş, Süha; Gür, Cemil Hakan (2021-09-01)
Recently, additive manufacturing of maraging steels has gained importance as an alternative to the traditional manufacturing techniques for aerospace components. In this study, various procedures were conducted to find optimum homogenization and aging treatment parameters for 18Ni300 parts that were additively manufactured via Selective Laser Melting (SLM).
Characterization of novel materials for fused filament fabrication
AL-DUAIS, ABDULLAH ABDULRAHMAN NAJI; Özerinç, Sezer; Kazanç Özerinç, Feyza; Department of Mechanical Engineering (2021-6-24)
Fused filament fabrication (FFF) is a polymer additive manufacturing technology that is suitable for a wide range of applications due to its low cost and ease of use. This thesis investigated two types of novel materials for FFF use. First, a foaming PLA filament is considered and the mechanical properties of 3D printed specimens using this filament is characterized. The results show that the strength, modulus and density of the foaming PLA can be tuned over a wide range of values by varying FFF process par...
Effect of fused deposition modeling process parameters on the mechanical properties of recycled polyethylene terephthalate parts
Bakir, Ali Alperen; Atik, Resul; Özerinç, Sezer (Wiley, 2020-08-01)
Fused deposition modeling (FDM) filaments made of recycled materials are desirable for environmentally friendly and sustainable manufacturing of prototypes and load-bearing components in many applications. We investigate the effect of FDM process parameters on the mechanical properties of 3D-printed parts made of recycled polyethylene terephthalate (rPET) filaments. Increasing the nozzle temperature from 230 degrees C to 260 degrees C improves the strength of the specimens by 100%. Using a raster orientatio...
EFFECT OF OUT-OF-AUTOCLAVE CURING ON THE BENDING STRENGTH OF TPNCF AND UNIDIRECTIONAL LAMINATES
Bozkurt, Mirac Onur; Bilge, Kaan; Papila, Melih; Çöker, Demirkan (null; 2017-09-20)
Out-of-autoclave(ooA)treatments in composite manufacturing draw the attention ofmanufacturers anddesigners in aerospace industry by offering numerous advantages over the traditional autoclave processing. Besides, thin ply non crimp fabric (TPNCF) architecture is proven for improved delamination resistance and fracture toughness. The objective of the study is comparingthe bending strength of flat and curved beams of TPNCF [0/45] and Unidirectional (UD)[0/45] aut...
Mechanical behavior of additively manufactured polymer composite structures and interfaces
Kepenekci, Mehmet; Özerinç, Sezer; Department of Mechanical Engineering (2021-9-6)
Additive manufacturing (AM) is a technology based on the layer-by-layer production of parts. Fused filament fabrication (FFF) is one of the most cost-effective and popular AM techniques for the production of polymeric structures. While the initial use of FFF was limited to thermoplastics such as PLA and ABS, recent advances enabled the printing of composite materials and structures for superior mechanical performance. Multi-material printing through dual-nozzle systems offers a unique opportunity towards t...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Aydın, “Effect of annealing on the mechanical properties of pla parts produced by fused filament fabrication,” M.S. - Master of Science, Middle East Technical University, 2021.