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High Temperature Materials and Processes

Editor-in-Chief: Fukuyama, Hiroyuki

Editorial Board: Waseda, Yoshio / Fecht, Hans-Jörg / Reddy, Ramana G. / Manna, Indranil / Nakajima, Hideo / Nakamura, Takashi / Okabe, Toru / Ostrovski, Oleg / Pericleous, Koulis / Seetharaman, Seshadri / Straumal, Boris / Suzuki, Shigeru / Tanaka, Toshihiro / Terzieff, Peter / Uda, Satoshi / Urban, Knut / Baron, Michel / Besterci, Michael / Byakova, Alexandra V. / Gao, Wei / Glaeser, Andreas / Gzesik, Z. / Hosson, Jeff / Masanori, Iwase / Jacob, Kallarackel Thomas / Kipouros, Georges / Kuznezov, Fedor


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Open Access
Online
ISSN
2191-0324
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Volume 31, Issue 1

Issues

Contribution to Kinetics of Superplastic Deformation of Dispersion Strengthened Al-Al4C3 System

Michal Besterci
  • Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04353 Košice, Slovak Republic
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/ Marián Varchola
  • Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04353 Košice, Slovak Republic
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/ Ladislav Kováč
  • Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04353 Košice, Slovak Republic
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/ Oksana Velgosová
  • Corresponding author
  • Department of Materials Science, Faculty of Metallurgy, Technical University in Košice, Park Komenského 11, 04200 Košice, Slovak Republic
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Published Online: 2012-02-09 | DOI: https://doi.org/10.1515/htmp.2011.121

Abstract

The influence of temperature at constant strain rate has been evaluated with respect to superplastic behavior of dispersion strengthened Al-Al4C3 composite with 4 vol.% of Al4C3 phase. The dispersion strengthened Al-Al4C3 was prepared by powder metallurgy. Material can be characterized by grain size around 1 μm and dispersed particle Al4C3 size around 50 nm. This material showed superplastic behavior for strain rate 10-3 s-1 by test temperature 573 K. The mechanism of superplastic deformation was also investigated. For the presented material with low content of disperse particle slip on grain boundaries is typical. The final fracture is transcrystalline with dimples with their mean size 1.25 μm. The dimples are initialized by Al4C3 particles in size from 40 to 50 nm.

Keywords.: Dispersion strengthening; Al-Al4C3 system; superplasticity; fracture mechanism

About the article

Received: 2011-05-11

Accepted: 2011-06-01

Published Online: 2012-02-09

Published in Print: 2012-02-01


Citation Information: High Temperature Materials and Processes, Volume 31, Issue 1, Pages 3–5, ISSN (Online) 2191-0324, ISSN (Print) 0334-6455, DOI: https://doi.org/10.1515/htmp.2011.121.

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©2012 by Walter de Gruyter Berlin Boston.Get Permission

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