A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel
Owing to the relatively lower dimensional accuracy and poorer surface finish compared to other additive manufacturing (AM) technologies, directed energy deposition (DED) yields parts that often require extensive post-processing. Thus, it is well suited to be combined with subtractive or deformation...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161137 |
| _version_ | 1826118189410418688 |
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| author | Gao, Shubo Liu, Ruiliang Huang, Rui Song, Xu Seita, Matteo |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Gao, Shubo Liu, Ruiliang Huang, Rui Song, Xu Seita, Matteo |
| author_sort | Gao, Shubo |
| collection | NTU |
| description | Owing to the relatively lower dimensional accuracy and poorer surface finish compared to other additive manufacturing (AM) technologies, directed energy deposition (DED) yields parts that often require extensive post-processing. Thus, it is well suited to be combined with subtractive or deformation processes into hybrid manufacturing strategies, which may enable microstructure engineering of near-net-shape parts directly upon production. In this work, we use a custom-made machine that combines DED and single point incremental forming (SPIF) processes to produce samples of stainless steel 316L which are amenable to undergo recrystallization upon heat treatment. After recrystallization, the microstructure exhibits a high density of twin boundaries, which are known to enhance the physical and mechanical properties of alloys. We investigate how different SPIF parameters affect the extent of recrystallization and find that our strategy may be used to produce both gradient and “sandwich” microstructures, which integrate dissimilar grain boundary character distributions and grain structures. We assess the corrosion resistance and mechanical properties of such samples and discuss the resulting performance enhancement. Our results showcase new opportunities for microstructure engineering of DED components and lay the groundwork for the design of AM processes that enable grain boundary engineering of metal alloys. |
| first_indexed | 2024-10-01T04:39:39Z |
| format | Journal Article |
| id | ntu-10356/161137 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:39:39Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1611372022-08-20T20:11:54Z A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel Gao, Shubo Liu, Ruiliang Huang, Rui Song, Xu Seita, Matteo School of Mechanical and Aerospace Engineering School of Materials Science and Engineering Singapore Institute of Manufacturing Technology Singapore Centre for Environmental Life Sciences and Engineering (SCELSE) Engineering::Mechanical engineering Directed Energy Deposition Single Point Incremental Forming Owing to the relatively lower dimensional accuracy and poorer surface finish compared to other additive manufacturing (AM) technologies, directed energy deposition (DED) yields parts that often require extensive post-processing. Thus, it is well suited to be combined with subtractive or deformation processes into hybrid manufacturing strategies, which may enable microstructure engineering of near-net-shape parts directly upon production. In this work, we use a custom-made machine that combines DED and single point incremental forming (SPIF) processes to produce samples of stainless steel 316L which are amenable to undergo recrystallization upon heat treatment. After recrystallization, the microstructure exhibits a high density of twin boundaries, which are known to enhance the physical and mechanical properties of alloys. We investigate how different SPIF parameters affect the extent of recrystallization and find that our strategy may be used to produce both gradient and “sandwich” microstructures, which integrate dissimilar grain boundary character distributions and grain structures. We assess the corrosion resistance and mechanical properties of such samples and discuss the resulting performance enhancement. Our results showcase new opportunities for microstructure engineering of DED components and lay the groundwork for the design of AM processes that enable grain boundary engineering of metal alloys. National Research Foundation (NRF) Published version This work was supported by the National Research Foundation (NRF) Singapore, under the NRF Fellowship programme (NRF-NRFF2018-05). 2022-08-16T07:55:20Z 2022-08-16T07:55:20Z 2022 Journal Article Gao, S., Liu, R., Huang, R., Song, X. & Seita, M. (2022). A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel. Materials & Design, 213, 110360-. https://dx.doi.org/10.1016/j.matdes.2021.110360 0261-3069 https://hdl.handle.net/10356/161137 10.1016/j.matdes.2021.110360 2-s2.0-85121922332 213 110360 en NRF-NRFF2018-05 Materials & Design © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf |
| spellingShingle | Engineering::Mechanical engineering Directed Energy Deposition Single Point Incremental Forming Gao, Shubo Liu, Ruiliang Huang, Rui Song, Xu Seita, Matteo A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel |
| title | A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel |
| title_full | A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel |
| title_fullStr | A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel |
| title_full_unstemmed | A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel |
| title_short | A hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel |
| title_sort | hybrid directed energy deposition process to manipulate microstructure and properties of austenitic stainless steel |
| topic | Engineering::Mechanical engineering Directed Energy Deposition Single Point Incremental Forming |
| url | https://hdl.handle.net/10356/161137 |
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