Rights statement: This is the author’s version of a work that was accepted for publication in Journal of Manufacturing Processes. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Manufacturing Processes, 55, 2020 DOI: 10.1016/j.jmapro.2020.04.039
Accepted author manuscript, 425 KB, PDF document
Available under license: CC BY-NC-ND
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Generation of graded porous structures by control of process parameters in the selective laser melting of a fixed ratio salt-metal feedstock
AU - Aboulkhair, N.T.
AU - Zhao, G.
AU - Hague, R.J.M.
AU - Kennedy, A.R.
AU - Ashcroft, I.A.
AU - Clare, A.T.
N1 - This is the author’s version of a work that was accepted for publication in Journal of Manufacturing Processes. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Manufacturing Processes, 55, 2020 DOI: 10.1016/j.jmapro.2020.04.039
PY - 2020/7/1
Y1 - 2020/7/1
N2 - The demonstration of salt dissolution incorporated within laser powder-bed fusion fabrication processes has allowed the creation of complex porous structures without the need for sophisticated design algorithms. This serves to simplify the process, for porous structure creation in powder-bed fabrication techniques, creating a new opportunity for the realisation of optimised structures. A new methodology is presented here in which modulation of the energy density while using a single feedstock material enables three-dimensional control of porosity, ranging from 20 % to 49 %. Through structured experimentation, the response of the material to varying the process parameters in selective laser melting is evaluated and nested structures of distinct densities and morphologies are created. Correlation of the process parameters with modulus and ultimate compressive stress are established. A simple-assembly algorithm was used to generate complex parts consisting of locally assigned porosities having characteristic properties.
AB - The demonstration of salt dissolution incorporated within laser powder-bed fusion fabrication processes has allowed the creation of complex porous structures without the need for sophisticated design algorithms. This serves to simplify the process, for porous structure creation in powder-bed fabrication techniques, creating a new opportunity for the realisation of optimised structures. A new methodology is presented here in which modulation of the energy density while using a single feedstock material enables three-dimensional control of porosity, ranging from 20 % to 49 %. Through structured experimentation, the response of the material to varying the process parameters in selective laser melting is evaluated and nested structures of distinct densities and morphologies are created. Correlation of the process parameters with modulus and ultimate compressive stress are established. A simple-assembly algorithm was used to generate complex parts consisting of locally assigned porosities having characteristic properties.
KW - Additive manufacturing
KW - Cellular structures
KW - Controlled-porosity
KW - Graded materials
KW - Mechanical performance
KW - Porous
KW - Selective laser melting
KW - Feedstocks
KW - Laser materials processing
KW - Melting
KW - Porosity
KW - Powder metals
KW - Assembly algorithm
KW - Characteristic properties
KW - Dimensional control
KW - Fabrication process
KW - Fabrication technique
KW - Feedstock materials
KW - Nested structures
KW - Process parameters
KW - Process control
U2 - 10.1016/j.jmapro.2020.04.039
DO - 10.1016/j.jmapro.2020.04.039
M3 - Journal article
VL - 55
SP - 249
EP - 253
JO - Journal of Manufacturing Processes
JF - Journal of Manufacturing Processes
SN - 1526-6125
ER -