Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum
Cobalt-chromium-molybdenum (CoCrMo) alloys have excellent properties that make them widely used in dental applications. Selective laser melting (SLM) is a laser powder bed fusion (L-PBF) additive manufacturing (AM), or 3D printing, technique that can fabricate functional parts directly using these a...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/141432 |
| _version_ | 1811676771221766144 |
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| author | Sing, Swee Leong Huang, Sheng Yeong, Wai Yee |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Sing, Swee Leong Huang, Sheng Yeong, Wai Yee |
| author_sort | Sing, Swee Leong |
| collection | NTU |
| description | Cobalt-chromium-molybdenum (CoCrMo) alloys have excellent properties that make them widely used in dental applications. Selective laser melting (SLM) is a laser powder bed fusion (L-PBF) additive manufacturing (AM), or 3D printing, technique that can fabricate functional parts directly using these alloys. In this work, SLM is used to fabricate CoCrMo samples and they underwent different heat treatments originally designed for casted CoCrMo alloy. The mechanical properties, such as ultimate tensile strength, yield strength and microhardness of the heat treated SLM CoCrMo parts are evaluated and benchmarked against their casted counterparts. It is found that as-built samples have anisotropy properties while heat treated samples displayed isotropic properties. As-built SLM CoCrMo specimens demonstrated approximately twice the yield strength (YS) and ultimate tensile strength (UTS) as compared to ASTM F75 standard for cast CoCrMo alloys. However, both UTS and YS of SLM CoCrMo decreased after heat treatment. The microstructure analysis concluded carbides formation because of the heat treatments. |
| first_indexed | 2024-10-01T02:26:46Z |
| format | Journal Article |
| id | ntu-10356/141432 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:26:46Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1414322021-01-29T02:51:32Z Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum Sing, Swee Leong Huang, Sheng Yeong, Wai Yee School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Engineering::Mechanical engineering Additive Manufacturing 3D Printing Cobalt-chromium-molybdenum (CoCrMo) alloys have excellent properties that make them widely used in dental applications. Selective laser melting (SLM) is a laser powder bed fusion (L-PBF) additive manufacturing (AM), or 3D printing, technique that can fabricate functional parts directly using these alloys. In this work, SLM is used to fabricate CoCrMo samples and they underwent different heat treatments originally designed for casted CoCrMo alloy. The mechanical properties, such as ultimate tensile strength, yield strength and microhardness of the heat treated SLM CoCrMo parts are evaluated and benchmarked against their casted counterparts. It is found that as-built samples have anisotropy properties while heat treated samples displayed isotropic properties. As-built SLM CoCrMo specimens demonstrated approximately twice the yield strength (YS) and ultimate tensile strength (UTS) as compared to ASTM F75 standard for cast CoCrMo alloys. However, both UTS and YS of SLM CoCrMo decreased after heat treatment. The microstructure analysis concluded carbides formation because of the heat treatments. Accepted version 2020-06-08T07:13:46Z 2020-06-08T07:13:46Z 2019 Journal Article Sing, S. L., Huang, S., & Yeong, W. Y. (2020). Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum. Materials Science and Engineering A, 769, 138511-. doi:10.1016/j.msea.2019.138511 0921-5093 https://hdl.handle.net/10356/141432 10.1016/j.msea.2019.138511 2-s2.0-85072917455 769 en Materials Science and Engineering A © 2019 Elsevier B.V. All rights reserved. This paper was published in Materials Science and Engineering A and is made available with permission of Elsevier B.V. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Additive Manufacturing 3D Printing Sing, Swee Leong Huang, Sheng Yeong, Wai Yee Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum |
| title | Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum |
| title_full | Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum |
| title_fullStr | Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum |
| title_full_unstemmed | Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum |
| title_short | Effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt-28chromium-6molybdenum |
| title_sort | effect of solution heat treatment on microstructure and mechanical properties of laser powder bed fusion produced cobalt 28chromium 6molybdenum |
| topic | Engineering::Mechanical engineering Additive Manufacturing 3D Printing |
| url | https://hdl.handle.net/10356/141432 |
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