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Ioannis Papantoniou https://orcid.org/0000-0002-1498-7905 Helena Kyriakopoulou https://orcid.org/0000-0003-2319-3661 Dimitrios Pantelis Dimitrios Manolakos https://orcid.org/0000-0002-0249-5647

Abstract

Aluminium foams, produced by powder metallurgy process, have significant potential applications for uses in weight-sensitive structural parts. Problems in the production of metal foams arise from the lack of knowledge in the control of process parameters. The results are frequently uneven and un­predictable variations in the structure and properties of the final foamed parts are observed. This paper aims to investigate the effect of different para­meters of the powder metallurgy with foaming agents process on the foaming efficiency. The parameters examined included the powder morpho­logy, the compaction pressure and the foaming temperature. During the foaming stage, for each set of parameters the porosity-time (Pf-t) diagrams were created and the foaming efficiency was calculated (η=Pfmax). Results indicated that the highest foaming efficiency was observed at the specimens with the fine alu­min­ium powder, with high (700 MPa) compaction pressure and high foaming temperatures (800 oC). Finally, compression tests were per­formed on the foamed specimens with the higher foaming efficiency in order to investigate their s-e response. Furthermore, average compressive strength and density were estimated and presented.

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Section
SI: Research activities of the Greek Society of Experimental Mechanics of Materi

How to Cite

Papantoniou, I., Kyriakopoulou, H., Pantelis, D. and Manolakos, D. (2019) “Metal foaming by powder metallurgy process: investigation of different parameters on the foaming efficiency”, Frattura ed Integrità Strutturale, 13(50), pp. 497-504. doi: 10.3221/IGF-ESIS.50.41.