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.
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Abstract
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.
| Item Type: | Article |
|---|---|
| Keyword: | Interpass time, Thermal stress, Additive manufacturing, Directed energy deposition, Ti–6Al–4V, Planar layer, Thermo-mechanical analysis |
| Subjects: | H Social Sciences > HD Industries. Land use. Labor > HD28-9999 Industries. Land use. Labor > HD9000-9999 Special industries and trades > HD9720-9975 Manufacturing industries T Technology > T Technology (General) > T1-995 Technology (General) > T55.4-60.8 Industrial engineering. Management engineering |
| Department: | FACULTY > Faculty of Engineering |
| Depositing User: | SITI AZIZAH BINTI IDRIS - |
| Date Deposited: | 31 Dec 2024 09:20 |
| Last Modified: | 31 Dec 2024 09:20 |
| URI: | https://eprints.ums.edu.my/id/eprint/42460 |
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