Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing
This study investigates the effect of high current density electropulsing on the material in a rapid stress relaxation process. An AISI 1020 steel was shot-peened to induce surface compressive residual stresses in a controlled manner and subsequently electropulsed to investigate the changes in micro...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/179074 |
| _version_ | 1826117674335207424 |
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| author | Bhowmik, Ayan Tan, Jin Lee Yang, Yongjing Aprilia, Aprilia Chia, Nicholas Williams, Paul Jones, Martyn Zhou, Wei |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Bhowmik, Ayan Tan, Jin Lee Yang, Yongjing Aprilia, Aprilia Chia, Nicholas Williams, Paul Jones, Martyn Zhou, Wei |
| author_sort | Bhowmik, Ayan |
| collection | NTU |
| description | This study investigates the effect of high current density electropulsing on the material in a rapid stress relaxation process. An AISI 1020 steel was shot-peened to induce surface compressive residual stresses in a controlled manner and subsequently electropulsed to investigate the changes in microstructure and defect configuration. AISI 1020 steel was chosen as it has a simple microstructure (plain ferritic) and composition with low alloying conditions. It is an appropriate material to study the effect of transmitting electric pulses on the microstructural defect evolution. A combination of electron-backscattered diffraction and transmission electron microscopy proved to be an effective tool in characterizing the post-electropulsing effects critically. By application of electropulsing, a reduction in the surface residual stress layer was noticed. Also, reductions in misorientation and dislocation density together with the disentanglement of dislocations within the cold-worked layer were observed after electropulsing. Additionally, the annihilation of shot-peening-induced deformation bands beyond the residual layer depth was observed. These effects have been rationalised by taking into account the various possibilities of athermal effects of electropulsing. |
| first_indexed | 2024-10-01T04:31:10Z |
| format | Journal Article |
| id | ntu-10356/179074 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:31:10Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1790742024-07-17T02:21:15Z Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing Bhowmik, Ayan Tan, Jin Lee Yang, Yongjing Aprilia, Aprilia Chia, Nicholas Williams, Paul Jones, Martyn Zhou, Wei School of Mechanical and Aerospace Engineering Rolls-Royce@NTU Corporate Laboratory Engineering Electropulsing Residual stress This study investigates the effect of high current density electropulsing on the material in a rapid stress relaxation process. An AISI 1020 steel was shot-peened to induce surface compressive residual stresses in a controlled manner and subsequently electropulsed to investigate the changes in microstructure and defect configuration. AISI 1020 steel was chosen as it has a simple microstructure (plain ferritic) and composition with low alloying conditions. It is an appropriate material to study the effect of transmitting electric pulses on the microstructural defect evolution. A combination of electron-backscattered diffraction and transmission electron microscopy proved to be an effective tool in characterizing the post-electropulsing effects critically. By application of electropulsing, a reduction in the surface residual stress layer was noticed. Also, reductions in misorientation and dislocation density together with the disentanglement of dislocations within the cold-worked layer were observed after electropulsing. Additionally, the annihilation of shot-peening-induced deformation bands beyond the residual layer depth was observed. These effects have been rationalised by taking into account the various possibilities of athermal effects of electropulsing. Nanyang Technological University National Research Foundation (NRF) This work was financially supported by the National Research Foundation of Singapore, Rolls-Royce Singapore Pte. Ltd., and Nanyang Technological University through grants #002123-00009 and #002124-00009. 2024-07-17T02:21:15Z 2024-07-17T02:21:15Z 2025 Journal Article Bhowmik, A., Tan, J. L., Yang, Y., Aprilia, A., Chia, N., Williams, P., Jones, M. & Zhou, W. (2025). Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing. Journal of Materials Science and Technology, 209, 292-299. https://dx.doi.org/10.1016/j.jmst.2024.05.031 1005-0302 https://hdl.handle.net/10356/179074 10.1016/j.jmst.2024.05.031 2-s2.0-85195817158 209 292 299 en 002123-00009 002124-00009 Journal of Materials Science and Technology © 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. All rights reserved. |
| spellingShingle | Engineering Electropulsing Residual stress Bhowmik, Ayan Tan, Jin Lee Yang, Yongjing Aprilia, Aprilia Chia, Nicholas Williams, Paul Jones, Martyn Zhou, Wei Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing |
| title | Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing |
| title_full | Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing |
| title_fullStr | Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing |
| title_full_unstemmed | Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing |
| title_short | Misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing |
| title_sort | misorientation and dislocation evolution in rapid residual stress relaxation by electropulsing |
| topic | Engineering Electropulsing Residual stress |
| url | https://hdl.handle.net/10356/179074 |
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