<p>Metal 3D printing typically requires high
energy laser or electron sources. Recently, 3D printing using metal filled
filaments becomes available which uses PLA filaments filled with metal powders
(such as copper, bronze, brass, and stainless steel). Although there are some
studies on their printability, the detailed study of their sintering and characterizations
is still missing.</p>
<p>In this study, the research is focused on
3D printing of bronze filaments. Bronze
is a popular metal for many important uses. The objectives of this research
project are to study the optimal processing conditions (like printer settings,
nozzle, and bed temperatures) to print bronze metal filament, develop the
sintering conditions (temperature and duration), and characterization of the
microstructure and mechanical properties of 3D printed specimens to produce
strong specimens.</p>
<p>The thesis includes three components: (1)
3D printing and sintering at selected conditions, following a design of
experiment (DOE) principle; (2) microstructure and compositional
characterizations; and (3) mechanical property characterization. The results
show that it is feasible to print using bronze filaments using a typical FDM
machine with optimized printing settings. XRD spectrums show that there is no
effect of sintering temperature on the composition of the printed parts. SEM
images illustrate the porous structure of the printed and sintered parts,
suggesting the need to optimize the process to improve the density. The micro hardness
and three-point bending tests show that the mechanical strengths are highly
related to the sintering conditions. This study provides important information
of applying the bronze filament in future engineering applications.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/7438619 |
| Date | 16 January 2019 |
| Creators | Oyedotun Ayeni (5931011) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/Sintering_and_Characterizations_of_3D_Printed_Bronze_Metal_Filament/7438619 |
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