Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer
Directed energy deposition (DED) provides a promising additive manufacturing method to fabricate and repair large metallic parts. However, it may suffer from excessive heat accumulation due to a high build rate, particularly during a wire feeding-type DED process. The implementation of interpass tim...
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| Format: | Article |
| Language: | English |
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MDPI
2020
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| Online Access: | https://eprints.ums.edu.my/id/eprint/42460/1/FULL%20TEXT.pdf |
| _version_ | 1825716041243688960 |
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| author | Chua, Bih Lii Ahn, Dong-Gyu |
| author_facet | Chua, Bih Lii Ahn, Dong-Gyu |
| author_sort | Chua, Bih Lii |
| collection | UMS |
| description | Directed energy deposition (DED) provides a promising additive manufacturing method to fabricate and repair large metallic parts. However, it may suffer from excessive heat accumulation due to a high build rate, particularly during a wire feeding-type DED process. The implementation of interpass time in between two depositions of beads plays an important process role to passively control the interpass temperature. In this study, a method to estimate the proper interpass time using regression analysis from heat transfer finite element analysis is proposed for maintaining the interpass temperature during a wire feeding-type DED deposition of a planar layer. The overlapping beads of a planar layer are estimated using a polygonal-shaped bead profile in the finite element model. From the estimated proper interpass time, a selected proper interpass time scheme (PITS) is suggested for practical implementation. The selected PITS is applied in a thermo-mechanical finite element model to evaluate the temperature distribution and its effects on the depth of the melt pool, the depth of the heat-affected zone (HAZ), displacement, and residual stresses. By comparing the predicted results with those using a constant interpass time scheme (CITS), the selected PITS shows better control in reducing the depths of the melt pool and HAZ without severely inducing large displacement and residual stresses. |
| first_indexed | 2025-03-05T01:34:57Z |
| format | Article |
| id | ums.eprints-42460 |
| institution | Universiti Malaysia Sabah |
| language | English |
| last_indexed | 2025-03-05T01:34:57Z |
| publishDate | 2020 |
| publisher | MDPI |
| record_format | dspace |
| spelling | ums.eprints-424602024-12-31T01:20:42Z https://eprints.ums.edu.my/id/eprint/42460/ Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer Chua, Bih Lii Ahn, Dong-Gyu HD9720-9975 Manufacturing industries T55.4-60.8 Industrial engineering. Management engineering Directed energy deposition (DED) provides a promising additive manufacturing method to fabricate and repair large metallic parts. However, it may suffer from excessive heat accumulation due to a high build rate, particularly during a wire feeding-type DED process. The implementation of interpass time in between two depositions of beads plays an important process role to passively control the interpass temperature. In this study, a method to estimate the proper interpass time using regression analysis from heat transfer finite element analysis is proposed for maintaining the interpass temperature during a wire feeding-type DED deposition of a planar layer. The overlapping beads of a planar layer are estimated using a polygonal-shaped bead profile in the finite element model. From the estimated proper interpass time, a selected proper interpass time scheme (PITS) is suggested for practical implementation. The selected PITS is applied in a thermo-mechanical finite element model to evaluate the temperature distribution and its effects on the depth of the melt pool, the depth of the heat-affected zone (HAZ), displacement, and residual stresses. By comparing the predicted results with those using a constant interpass time scheme (CITS), the selected PITS shows better control in reducing the depths of the melt pool and HAZ without severely inducing large displacement and residual stresses. MDPI 2020 Article NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/42460/1/FULL%20TEXT.pdf Chua, Bih Lii and Ahn, Dong-Gyu (2020) Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer. Materials, 13. pp. 1-19. http://dx.doi.org/10.3390/ma13214935 |
| spellingShingle | HD9720-9975 Manufacturing industries T55.4-60.8 Industrial engineering. Management engineering Chua, Bih Lii Ahn, Dong-Gyu Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer |
| title | Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer |
| title_full | Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer |
| title_fullStr | Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer |
| title_full_unstemmed | Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer |
| title_short | Estimation method of Interpass time for the control of temperature during a directed energy deposition process of a Ti–6Al–4V planar layer |
| title_sort | estimation method of interpass time for the control of temperature during a directed energy deposition process of a ti 6al 4v planar layer |
| topic | HD9720-9975 Manufacturing industries T55.4-60.8 Industrial engineering. Management engineering |
| url | https://eprints.ums.edu.my/id/eprint/42460/1/FULL%20TEXT.pdf |
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