Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties

In this work, a novel approach combining liquid deposition with selective laser melting (SLM) is used for fabricating reduced graphene oxide (RGO)/S136 metal matrix composites (MMCs). The grain sizes, crystallographic textures, phase compositions and mechanical properties can be tailored by controll...

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Main Authors: Wen, Shifeng, Chen, Keyu, Li, Wei, Zhou, Yan, Wei, Qingsong, Shi, Yusheng
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/106821
http://hdl.handle.net/10220/49643
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1068212023-03-04T17:21:37Z Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties Wen, Shifeng Chen, Keyu Li, Wei Zhou, Yan Wei, Qingsong Shi, Yusheng School of Mechanical and Aerospace Engineering S136 steel Engineering::Mechanical engineering Selective Laser Melting In this work, a novel approach combining liquid deposition with selective laser melting (SLM) is used for fabricating reduced graphene oxide (RGO)/S136 metal matrix composites (MMCs). The grain sizes, crystallographic textures, phase compositions and mechanical properties can be tailored by controlling the RGO content in the RGO/S136 MMCs. The results show that the average grain size reaches its smallest size of 0.75 μm when 0.1 wt% RGO was added to the RGO/S136 MMCs. As the RGO content is increased from 0 wt% to 0.5 wt%, a continuous transition of the grains from the (001) orientation to the (101) and (111) orientations is observed. In addition, the cellular dendritic grains transform into equiaxed fine grains with increasing RGO content. The SLM-prepared RGO/S136 MMCs are dominated by high-angle grain boundaries (˃15°) and the martensite (bcc) phase. The hardness, ultimate tensile strength and yield strength of the SLM RGO/S136 MMCs exhibit trends that initially increase and then decrease, with maximum values of 580.6 HV, 535.3 MPa and 515.8 MPa, respectively. This paper highlights the possibility of controlling the RGO content to achieve the desired microstructural characteristics and mechanical properties of RGO/S136 MMCs fabricated by the SLM process. Published version 2019-08-15T02:48:05Z 2019-12-06T22:19:08Z 2019-08-15T02:48:05Z 2019-12-06T22:19:08Z 2019 Journal Article Wen, S., Chen, K., Li, W., Zhou, Y., Wei, Q., & Shi, Y. (2019). Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties. Materials & Design, 175, 107811-. doi;10.1016/j.matdes.2019.107811 0261-3069 https://hdl.handle.net/10356/106821 http://hdl.handle.net/10220/49643 10.1016/j.matdes.2019.107811 en Materials & Design © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). 11 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic S136 steel
Engineering::Mechanical engineering
Selective Laser Melting
spellingShingle S136 steel
Engineering::Mechanical engineering
Selective Laser Melting
Wen, Shifeng
Chen, Keyu
Li, Wei
Zhou, Yan
Wei, Qingsong
Shi, Yusheng
Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties
description In this work, a novel approach combining liquid deposition with selective laser melting (SLM) is used for fabricating reduced graphene oxide (RGO)/S136 metal matrix composites (MMCs). The grain sizes, crystallographic textures, phase compositions and mechanical properties can be tailored by controlling the RGO content in the RGO/S136 MMCs. The results show that the average grain size reaches its smallest size of 0.75 μm when 0.1 wt% RGO was added to the RGO/S136 MMCs. As the RGO content is increased from 0 wt% to 0.5 wt%, a continuous transition of the grains from the (001) orientation to the (101) and (111) orientations is observed. In addition, the cellular dendritic grains transform into equiaxed fine grains with increasing RGO content. The SLM-prepared RGO/S136 MMCs are dominated by high-angle grain boundaries (˃15°) and the martensite (bcc) phase. The hardness, ultimate tensile strength and yield strength of the SLM RGO/S136 MMCs exhibit trends that initially increase and then decrease, with maximum values of 580.6 HV, 535.3 MPa and 515.8 MPa, respectively. This paper highlights the possibility of controlling the RGO content to achieve the desired microstructural characteristics and mechanical properties of RGO/S136 MMCs fabricated by the SLM process.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Wen, Shifeng
Chen, Keyu
Li, Wei
Zhou, Yan
Wei, Qingsong
Shi, Yusheng
format Article
author Wen, Shifeng
Chen, Keyu
Li, Wei
Zhou, Yan
Wei, Qingsong
Shi, Yusheng
author_sort Wen, Shifeng
title Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties
title_short Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties
title_full Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties
title_fullStr Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties
title_full_unstemmed Selective laser melting of reduced graphene oxide/S136 metal matrix composites with tailored microstructures and mechanical properties
title_sort selective laser melting of reduced graphene oxide/s136 metal matrix composites with tailored microstructures and mechanical properties
publishDate 2019
url https://hdl.handle.net/10356/106821
http://hdl.handle.net/10220/49643
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