Manufacturing Technology 2022, 22(1):95-101 | DOI: 10.21062/mft.2022.014

The Influence of Cr Addition and Heat Treatment on Dilatometric Characteristics of Cast Fe-Al-Si Intermetallic Alloys

Věra Vodičková ORCID...1, Petra Pazourková Prokopčáková ORCID...1, Martin ©vec ORCID...1, Pavel Hanus ORCID...1, Jaromír Moravec ORCID...1, Libor Čamek ORCID...2
1 Faculty of Mechanical Engineering, Technical University of Liberec. Studentská 1402/2, Liberec. Czech Republic
2 Department of Foundry Engineering, Brno University of Technology. Technická 2896/2, Brno. Czech Republic

The cast Fe-Al-Si type intermetallic alloys (with or without chromium content) were investigated with the aim to obtain the values of thermal expansion coefficient and describe the dilatometric behavior of alloys. The effect of chromium addition, as well as the influence of heat treatment on the structure and dilatometric characteristics (thermal expansion coefficient, CTE), were described. It has been shown that the presence of chromium does not significantly influence the values of thermal expansion coefficient of as-cast alloys so that chromium addition can be substituted by higher silicon content. The annealing used for phase stabilization slightly decreases the CTE values for chromium doped alloys, nevertheless only in the higher temperature range. In comparison, CTE values of the alloy without chromium are slightly increased by the annealing used in the whole temperature interval. But, the differences are not significant from the point of view of technical practice.

Keywords: Fe3Al-type iron aluminides, silicon and chromium addition, thermal expansion coefficient, heat-treatment
Grants and funding:

This work was supported by the Ministry of Education, Youth and Sports of the Czech Republic and the European Union - European Structural and Investment Funds in the frames of Operational Programme Research, Development and Education - project Hybrid Materials for Hierarchical Structures (HyHi, Reg. No. CZ.02.1.01/0.0/0.0/16_019/0000843).

Received: November 9, 2021; Revised: January 28, 2022; Accepted: February 11, 2022; Prepublished online: February 11, 2022; Published: February 26, 2022  Show citation

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Vodičková V, Pazourková Prokopčáková P, ©vec M, Hanus P, Moravec J, Čamek L. The Influence of Cr Addition and Heat Treatment on Dilatometric Characteristics of Cast Fe-Al-Si Intermetallic Alloys. Manufacturing Technology. 2022;22(1):95-101. doi: 10.21062/mft.2022.014.
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