Investigation of 3D printed parts on selective laser melting process
Selective laser melting (SLM) is a powder bed based additive manufacturing process that is capable of fabricating complex functional metallic components with densities up to 99%. In this' study, the effect of print locations on the tensile strength of the samples fabricated using the SLM pro...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2017
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/72649 |
| Summary: | Selective laser melting (SLM) is a powder bed based additive manufacturing process that is
capable of fabricating complex functional metallic components with densities up to 99%. In this'
study, the effect of print locations on the tensile strength of the samples fabricated using the
SLM process is performed. A total of 12 tensile coupons were fabricated at four different
locations on a metal substrate in a single print. Micro computed tomography is used to identify
and validate the total percentage of porosity in a sample. Furthermore, different sizes of porosity
are characterised and analysed. Tensile tests are carried out to identify the ultimate tensile
strength of the samples printed at different locations. The results show that the percentage of
total porosity and printing locations have an influence on ultimate tensile strength. An increase in
the number of porosities leads to reduced tensile strength of the samples. The results also
illustrated that samples fabricated at different print locations exhibit individualized
characteristics. Furthermore, a massive cluster of porosity in the sample is identified as the
breaking point of during tensile test. |
|---|