Generation of graded porous structures by control of process parameters in the selective laser melting of a fixed ratio salt-metal feedstock

Aboulkhair, N.T. and Zhao, G. and Hague, R.J.M. and Kennedy, A.R. and Ashcroft, I.A. and Clare, A.T. (2020) Generation of graded porous structures by control of process parameters in the selective laser melting of a fixed ratio salt-metal feedstock. Journal of Manufacturing Processes, 55. pp. 249-253. ISSN 1526-6125

[img]
Text (Porous_Ti_-_salt_SLM_2)
Porous_Ti_salt_SLM_2.pdf - Accepted Version
Restricted to Repository staff only until 22 April 2021.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (434kB)

Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Manufacturing Processes
Additional Information:
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
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2209
Subjects:
ID Code:
143678
Deposited By:
Deposited On:
06 May 2020 14:15
Refereed?:
Yes
Published?:
Published
Last Modified:
06 Jul 2020 01:41