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Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting / J. A. Cherry; H. M. Davies; S. Mehmood; N. P. Lavery; S. G. R. Brown; J. Sienz

The International Journal of Advanced Manufacturing Technology, Volume: 76, Issue: 5-8, Pages: 869 - 879

Swansea University Author: Lavery, Nicholas

Abstract

Additive manufacturing by selective laser melting (SLM) was used to investigate the effect of laser energy density on 316L stainless steel properties. Point distance and exposure time were varied and their impact on porosity, surface finish, microstructure, density and hardness, was evaluated. The s...

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Published in: The International Journal of Advanced Manufacturing Technology
ISSN: 1433-3015
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa18363
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spelling 2017-06-22T13:34:44Z v2 18363 2014-09-10 Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting Nicholas Lavery Nicholas Lavery true 0000-0003-0953-5936 false 9f102ff59824fd4f7ce3d40144304395 ad5e73a1626ce7d57c8c7418e3c6a92c g8JyQWq5kxSxDymESsfkL8jwe531u+mO/3IG3xe5jMg= 2014-09-10 EEN Additive manufacturing by selective laser melting (SLM) was used to investigate the effect of laser energy density on 316L stainless steel properties. Point distance and exposure time were varied and their impact on porosity, surface finish, microstructure, density and hardness, was evaluated. The surface roughness was primarily affected by point distance with increased point distance resulting in increased surface roughness, R a, from 10 to 16 μm. Material hardness reached a maximum of 225 HV at 125 J/mm3 and was related to the material porosity; with increased porosity leading to decreased material hardness. Different types of particle coalescence leading to convex surface features were observed (sometimes referred to as balling); from small ball features at low laser energy density to a mixture of both small and large ball features at high laser energy density. Laser energy density was shown to affect total porosity. The minimum amount of porosity, 0.38 %, was observed at an energy density of 104.52 J/mm3. Journal article The International Journal of Advanced Manufacturing Technology 76 5-8 869 879 1433-3015 1 2 2015 2015-02-01 10.1007/s00170-014-6297-2 College of Engineering Engineering CENG EEN None None 2017-06-22T13:34:44Z 2014-09-10T08:16:26Z College of Engineering Engineering J. A. Cherry 1 H. M. Davies 2 S. Mehmood 3 N. P. Lavery 4 S. G. R. Brown 5 J. Sienz 6 0018363-30032016092829.pdf JournalofAdvancedManufacturingTechnology316LCherryLavery.pdf 2016-03-30T09:28:29Z Output 1431713 application/pdf AM true Updated Copyright 25/04/2016 2016-03-30T00:00:00 true
title Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting
spellingShingle Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting
Lavery, Nicholas
title_short Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting
title_full Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting
title_fullStr Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting
title_full_unstemmed Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting
title_sort Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting
author_id_str_mv 9f102ff59824fd4f7ce3d40144304395
author_id_fullname_str_mv 9f102ff59824fd4f7ce3d40144304395_***_Lavery, Nicholas
author Lavery, Nicholas
author2 J. A. Cherry
H. M. Davies
S. Mehmood
N. P. Lavery
S. G. R. Brown
J. Sienz
format Journal article
container_title The International Journal of Advanced Manufacturing Technology
container_volume 76
container_issue 5-8
container_start_page 869
publishDate 2015
institution Swansea University
issn 1433-3015
doi_str_mv 10.1007/s00170-014-6297-2
college_str College of Engineering
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hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
document_store_str 1
active_str 1
description Additive manufacturing by selective laser melting (SLM) was used to investigate the effect of laser energy density on 316L stainless steel properties. Point distance and exposure time were varied and their impact on porosity, surface finish, microstructure, density and hardness, was evaluated. The surface roughness was primarily affected by point distance with increased point distance resulting in increased surface roughness, R a, from 10 to 16 μm. Material hardness reached a maximum of 225 HV at 125 J/mm3 and was related to the material porosity; with increased porosity leading to decreased material hardness. Different types of particle coalescence leading to convex surface features were observed (sometimes referred to as balling); from small ball features at low laser energy density to a mixture of both small and large ball features at high laser energy density. Laser energy density was shown to affect total porosity. The minimum amount of porosity, 0.38 %, was observed at an energy density of 104.52 J/mm3.
published_date 2015-02-01T05:01:36Z
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