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Rapid fabrication of TiN/AISI 420 stainless steel composite by selective laser melting additive manufacturing

Rapid fabrication of TiN/AISI 420 stainless steel composite by selective laser melting additive manufacturing
Rapid fabrication of TiN/AISI 420 stainless steel composite by selective laser melting additive manufacturing
Although metal matrix composites (MMCs) possess high mechanical properties for wide potential applications, there are limited kinds of ex-situ MMCs fabricated via selective laser melting (SLM) until now. In this study, TiN/AISI 420 stainless steel (SS) MMCs samples were fabricated by SLM. Densification behavior, microstructure, hardness and wear performance were investigated with different TiN contents and laser powers. It was found that the addition of TiN has a strong influence on density, which was mainly attributed to its impact on laser absorptivity of powder and wettability of liquid metal. With a higher laser power, the diffusion behavior of TiN became stronger and the densification of composites was improved with a maximum relative density of 98.2%. Both of the distribution and solid-solution of TiN particles were investigated by SEM, XRD and EDS results. The optimized composites achieved a high hardness of HRC 56.7, which is 11.8% higher than that of SLMed pure AISI 420 SS. The wear performance was enhanced due to the improved hardness and TiN reinforcement particle.
Selective laser melting, Metal matrix composites, Microstructure, Wear performance
0924-0136
8-19
Zhao, Xiao
70e12f26-5ece-46cd-a186-3cac70e99a6f
Wei, Qingsong
e753f610-9fb9-43c4-98e9-60d48895c8da
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Zheng, Enlai
c50b35b4-b704-4333-ba59-c4aa6a3bc727
Shi, Yusheng
c5e10cdc-0c6e-4de9-877d-9b83955e0955
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Zhao, Xiao
70e12f26-5ece-46cd-a186-3cac70e99a6f
Wei, Qingsong
e753f610-9fb9-43c4-98e9-60d48895c8da
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Zheng, Enlai
c50b35b4-b704-4333-ba59-c4aa6a3bc727
Shi, Yusheng
c5e10cdc-0c6e-4de9-877d-9b83955e0955
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1

Zhao, Xiao, Wei, Qingsong, Gao, Nong, Zheng, Enlai, Shi, Yusheng and Yang, Shoufeng (2019) Rapid fabrication of TiN/AISI 420 stainless steel composite by selective laser melting additive manufacturing. Journal of Materials Processing Technology, 270, 8-19. (doi:10.1016/j.jmatprotec.2019.01.028).

Record type: Article

Abstract

Although metal matrix composites (MMCs) possess high mechanical properties for wide potential applications, there are limited kinds of ex-situ MMCs fabricated via selective laser melting (SLM) until now. In this study, TiN/AISI 420 stainless steel (SS) MMCs samples were fabricated by SLM. Densification behavior, microstructure, hardness and wear performance were investigated with different TiN contents and laser powers. It was found that the addition of TiN has a strong influence on density, which was mainly attributed to its impact on laser absorptivity of powder and wettability of liquid metal. With a higher laser power, the diffusion behavior of TiN became stronger and the densification of composites was improved with a maximum relative density of 98.2%. Both of the distribution and solid-solution of TiN particles were investigated by SEM, XRD and EDS results. The optimized composites achieved a high hardness of HRC 56.7, which is 11.8% higher than that of SLMed pure AISI 420 SS. The wear performance was enhanced due to the improved hardness and TiN reinforcement particle.

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More information

Accepted/In Press date: 27 January 2019
e-pub ahead of print date: 14 February 2019
Published date: August 2019
Keywords: Selective laser melting, Metal matrix composites, Microstructure, Wear performance

Identifiers

Local EPrints ID: 430958
URI: http://eprints.soton.ac.uk/id/eprint/430958
ISSN: 0924-0136
PURE UUID: 345674fa-b300-4a9f-bc61-4661cedf7c6f
ORCID for Xiao Zhao: ORCID iD orcid.org/0000-0002-9714-3176
ORCID for Shoufeng Yang: ORCID iD orcid.org/0000-0002-3888-3211

Catalogue record

Date deposited: 17 May 2019 16:30
Last modified: 26 Nov 2021 03:10

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Contributors

Author: Xiao Zhao ORCID iD
Author: Qingsong Wei
Author: Nong Gao
Author: Enlai Zheng
Author: Yusheng Shi
Author: Shoufeng Yang ORCID iD

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