Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel Parts

In recent years, selective laser melting (SLM) has gained an important place in fabrication due to their strong individualization which cannot be manufactured using conventional processes such as casting or forging. By proper control of the SLM processing parameters, characteristics of the alloy can...

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Main Authors: Shang Yitong, Yuan Yanping, Zhang Yongzhi, Li Dongfang, Li Yansheng
Format: Article
Language:English
Published: EDP Sciences 2017-01-01
Series:MATEC Web of Conferences
Online Access:https://doi.org/10.1051/matecconf/20179501009
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spelling doaj-0b56550f126d40e2aa0b9fdaabae2f7d2021-02-02T00:05:05ZengEDP SciencesMATEC Web of Conferences2261-236X2017-01-01950100910.1051/matecconf/20179501009matecconf_icmme2017_01009Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel PartsShang Yitong0Yuan Yanping1Zhang Yongzhi2Li DongfangLi Yansheng3College of Mechanical Engineering and Applied Electronics Technology, Beijing University of TechnologyInstitute of Laser Engineering, Beijing University of TechnologyInstitute of Laser Engineering, Beijing University of TechnologyCollege of Mechanical Engineering and Applied Electronics Technology, Beijing University of TechnologyIn recent years, selective laser melting (SLM) has gained an important place in fabrication due to their strong individualization which cannot be manufactured using conventional processes such as casting or forging. By proper control of the SLM processing parameters, characteristics of the alloy can be optimized. In the present work, 316L stainless steel (SS), as a widely used biomedical material, is investigated in terms of the effects of scanning speed on in vitro biocompatibility during SLM process. Cytotoxicity assay is adopted to assess the in vitro biocompatibility. The results show the scanning speed strongly affects the in vitro biocompatibility of 316L SS parts and with prolongs of incubation time, the cytotoxicity increase and the in vitro biocompatibility gets worse. The optimal parameters are determined as follows: scanning speed of 900 mm/s, laser power of 195 W, hatch spacing of 0.09 mm and layer thickness of 0.02 mm. The processing parameters lead to the change of surface morphology and microstructures of samples, which can affect the amount of toxic ions release, such as Cr, Mo and Co, that can increase risks to patient health and reduce the biocompatibility.https://doi.org/10.1051/matecconf/20179501009
collection DOAJ
language English
format Article
sources DOAJ
author Shang Yitong
Yuan Yanping
Zhang Yongzhi
Li Dongfang
Li Yansheng
spellingShingle Shang Yitong
Yuan Yanping
Zhang Yongzhi
Li Dongfang
Li Yansheng
Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel Parts
MATEC Web of Conferences
author_facet Shang Yitong
Yuan Yanping
Zhang Yongzhi
Li Dongfang
Li Yansheng
author_sort Shang Yitong
title Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel Parts
title_short Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel Parts
title_full Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel Parts
title_fullStr Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel Parts
title_full_unstemmed Investigation into Effects of Scanning Speed on in Vitro Biocompatibility of Selective Laser Melted 316L Stainless Steel Parts
title_sort investigation into effects of scanning speed on in vitro biocompatibility of selective laser melted 316l stainless steel parts
publisher EDP Sciences
series MATEC Web of Conferences
issn 2261-236X
publishDate 2017-01-01
description In recent years, selective laser melting (SLM) has gained an important place in fabrication due to their strong individualization which cannot be manufactured using conventional processes such as casting or forging. By proper control of the SLM processing parameters, characteristics of the alloy can be optimized. In the present work, 316L stainless steel (SS), as a widely used biomedical material, is investigated in terms of the effects of scanning speed on in vitro biocompatibility during SLM process. Cytotoxicity assay is adopted to assess the in vitro biocompatibility. The results show the scanning speed strongly affects the in vitro biocompatibility of 316L SS parts and with prolongs of incubation time, the cytotoxicity increase and the in vitro biocompatibility gets worse. The optimal parameters are determined as follows: scanning speed of 900 mm/s, laser power of 195 W, hatch spacing of 0.09 mm and layer thickness of 0.02 mm. The processing parameters lead to the change of surface morphology and microstructures of samples, which can affect the amount of toxic ions release, such as Cr, Mo and Co, that can increase risks to patient health and reduce the biocompatibility.
url https://doi.org/10.1051/matecconf/20179501009
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