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Effect of powder metallurgy synthesis parameters for pure aluminium on resultant mechanical properties

Liu, Jinghang, Silveira, Javier, Groarke, Robert, Parab, Sohan, Singh, Harshaan, McCarthy, Éanna, Karazi, Shadi orcid logoORCID: 0000-0002-8887-0873, Mussatto, Andre orcid logoORCID: 0000-0001-5335-7968, Houghtaling, Jared, Ahad, Inam Ul orcid logoORCID: 0000-0002-3802-6156, Naher, Sumsun orcid logoORCID: 0000-0003-2047-5807 and Brabazon, Dermot orcid logoORCID: 0000-0003-3214-6381 (2018) Effect of powder metallurgy synthesis parameters for pure aluminium on resultant mechanical properties. International Journal of Material Forming, 12 (1). pp. 79-87. ISSN 1960-6214

In this work, pure aluminium powders of different average particle size were compacted, sintered into discs and tested for mechanical strength at different strain rates. The effects of average particle size (15, 19, and 35 µm), sintering rate (5 and 20 °C/min) and sample indentation test speed (0.5, 0.7, and 1.0 mm/min) were examined. A compaction pressure of 332 MPa with a holding time of six minutes was used to produce the green compacted discs. The consolidated green specimens were sintered with a holding time of 4 hours, a temperature of 600 °C in an argon atmosphere. The resulting sintered samples contained higher than 85% density. The mechanical properties and microstructure were characterized using indentation strength measurement tests and SEM analysis respectively. After sintering, the aluminium grain structure was observed to be of uniform size within the fractured samples. The indentation test measurements showed that for the same sintering rate, the 35 µm powder particle size provided the highest radial and tangential strength while the 15 µm powder provided the lowest strengths. Another important finding from this work was the increase in sintered sample strength which was achieved using the lower sinter heating rate, 5°C/min. This resulted in a tangential stress value of 365 MPa which was significantly higher than achieved, 244 MPa, using the faster sintering heating rate, 20 °C/min.
Item Type:Article (Published)
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Research Institutes and Centres > I-Form
Official URL:https://doi.org/10.1007/s12289-018-1408-5
Copyright Information:© 2018 Springer-Verlag
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:22815
Deposited On:04 Mar 2019 16:24 by Fran Callaghan . Last Modified 27 May 2022 13:10

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