Martinez, R., Todd, I. orcid.org/0000-0003-0217-1658 and Mumtaz, K. orcid.org/0000-0001-8083-1661 (2019) In situ alloying of elemental Al-Cu12 feedstock using selective laser melting. Virtual and Physical Prototyping, 14 (3). pp. 242-252. ISSN 1745-2759
Abstract
This investigation developed selective laser melting (SLM) processing parameters for the in situ fabrication of an Al-Cu12 alloy from pure elemental blends of aluminium and copper powders. Use of elevated pre-heat temperatures (400°C) created a coarser dendritic cell microstructure consisting of supersaturated Al-rich with a uniform Al 2 Cu phase granular microstructure compared to non-pre-heated samples. Al-Cu12 in situ samples achieved maximum tensile strength values comparable to that of sand cast pre-alloyed Al-Cu12. Processing at elevated pre-heat temperatures created components with higher ultimate tensile strength and ductility compared to standard room temperature-built samples due to it assisting a more complete melting of Al and Cu particles. Additionally pre-heating enabled an artificial age hardening, producing an equilibrium α + θ microstructure. The creation of an alloy in situ through the use of elemental powder blends represents a low-cost and flexible methodology for exploration of new SLM material compositions and potential candidate materials for semi-solid processing using SLM.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Informa UK Limited, trading as Taylor & Francis Group. This is an author-produced version of a paper subsequently published in Virtual and Physical Prototyping. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Additive manufacturing; selective laser melting; in situ alloying |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 May 2019 15:42 |
Last Modified: | 15 Mar 2020 01:38 |
Status: | Published |
Publisher: | Taylor & Francis |
Refereed: | Yes |
Identification Number: | 10.1080/17452759.2019.1584402 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:146393 |