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INTENSIVE PLASTIC DEFORMATION OF PRE-SINTERED AL POWDER

1 KUNČICKÁ Lenka
Co-authors:
1 POHLUDKA Martin 2 LOWE Terry C. 2 DAVIS Casey F. 1 JUŘICA Jan 1 HLAVÁČ Libor
Institutions:
1 Regional Materials Science and Technology Centre, VSB-Technical University of Ostrava, Ostrava, Czech Republic, EU
2 The George S. Ansell Department of Metallurgical & Materials Engineering, Colorado School of Mines, Golden, Colorado, USA
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
247-252
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
506 views / 183 downloads
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Abstract

The influence of intensive plastic deformation on compacted Al powders was evaluated. The samples subjected to deformation processing were prepared from powder particles with diameters between 25 and 45 μm, pre-compacted using double-step cold isostatic pressing (CIP) at 200+300 MPa applied for 30 seconds each and subsequently vacuum sintered at 500°C for 60 min. Analyses of chemical composition of the sintered samples were carried out using scanning electron microscopy, while microhardness measurements were performed to evaluate the degree of compaction. The results showed increasing microhardness with increasing total imposed strain. Greater refinement of microstructure was achieved by increasing degrees of processing.

Keywords: intensive plastic deformation, swaging, HPT, aluminum powder, hardening

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