Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders
Selective Laser Melting (SLM) is an additive manufacturing technique capable of fabricating complex products layer by layer in a wide range of materials, particularly for metallic materials. As for ceramic materials such as Zirconia however, inconsistent part density continues to pose a challenge to...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2014
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/60964 |
| _version_ | 1826127391241535488 |
|---|---|
| author | Chen, Zhiyi |
| author2 | Chua Chee Kai |
| author_facet | Chua Chee Kai Chen, Zhiyi |
| author_sort | Chen, Zhiyi |
| collection | NTU |
| description | Selective Laser Melting (SLM) is an additive manufacturing technique capable of fabricating complex products layer by layer in a wide range of materials, particularly for metallic materials. As for ceramic materials such as Zirconia however, inconsistent part density continues to pose a challenge to the understanding of the relations between SLM process parameters and the aforementioned material. In this report, the thermal effect of SLM parameters on Zirconia are investigated numerically. A three dimensional transient thermal finite element model of the SLM process is presented. Temperature distribution simulation of a single-track laser melting with both Uniform and Gaussian laser beam profiles are conducted on a single-layered Zirconia powder bed model. The simulation results show that higher laser power and slower scanning speed yield a higher maximum temperature in the powder bed for both laser beam profiles. Gaussian laser beam, despite inducing higher laser energy due to its smaller laser
spot diameter, attained a lower maximum temperature in the powder bed as compared to Uniform laser beam at lower scanning speed. A 2K experiment conducted to further investigate the main effect of laser power and scanning scan on the maximum temperature of the powder bed reveals that the main effect of laser power is higher than the main effect of scanning speed. This finding is consistent for both laser profiles. The higher laser power induced a higher initial laser energy on the powder bed this enables the Zirconia powders to have a higher initial increase in temperature and thermal properties. |
| first_indexed | 2024-10-01T07:08:06Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/60964 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:08:06Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/609642023-03-04T18:18:43Z Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders Chen, Zhiyi Chua Chee Kai Leong Kah Fai School of Mechanical and Aerospace Engineering DRNTU::Engineering Selective Laser Melting (SLM) is an additive manufacturing technique capable of fabricating complex products layer by layer in a wide range of materials, particularly for metallic materials. As for ceramic materials such as Zirconia however, inconsistent part density continues to pose a challenge to the understanding of the relations between SLM process parameters and the aforementioned material. In this report, the thermal effect of SLM parameters on Zirconia are investigated numerically. A three dimensional transient thermal finite element model of the SLM process is presented. Temperature distribution simulation of a single-track laser melting with both Uniform and Gaussian laser beam profiles are conducted on a single-layered Zirconia powder bed model. The simulation results show that higher laser power and slower scanning speed yield a higher maximum temperature in the powder bed for both laser beam profiles. Gaussian laser beam, despite inducing higher laser energy due to its smaller laser spot diameter, attained a lower maximum temperature in the powder bed as compared to Uniform laser beam at lower scanning speed. A 2K experiment conducted to further investigate the main effect of laser power and scanning scan on the maximum temperature of the powder bed reveals that the main effect of laser power is higher than the main effect of scanning speed. This finding is consistent for both laser profiles. The higher laser power induced a higher initial laser energy on the powder bed this enables the Zirconia powders to have a higher initial increase in temperature and thermal properties. Bachelor of Engineering (Mechanical Engineering) 2014-06-03T08:26:14Z 2014-06-03T08:26:14Z 2014 2014 Final Year Project (FYP) http://hdl.handle.net/10356/60964 en Nanyang Technological University 75 p. application/pdf |
| spellingShingle | DRNTU::Engineering Chen, Zhiyi Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders |
| title | Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders |
| title_full | Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders |
| title_fullStr | Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders |
| title_full_unstemmed | Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders |
| title_short | Modelling of the thermal condition on selective laser melting (SLM) of zirconia powders |
| title_sort | modelling of the thermal condition on selective laser melting slm of zirconia powders |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/60964 |
| work_keys_str_mv | AT chenzhiyi modellingofthethermalconditiononselectivelasermeltingslmofzirconiapowders |