[Kovove materialy - Metallic materials]
    Tue - March 19, 2024 - 11:21 No. of hits : 1733743 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 38 (2000), Issue 1

Structure and properties of melt-spun Al-Zr-Ti alloys. II. The solidification microstructure and microhardness
MALEK, P., JANECEK, M., SMOLA, B., BARTUSKA, P.
vol. 38 (2000), no. 1, pp. 9 - 20

Abstract
Thin ribbons of the Al-Zr-Ti alloy with variable Zr:Ti ratio were prepared using the melt spinning method. The solidification microstructure was found to be inhomogeneous along the direction perpendicular to the ribbon plane and dependent on the Zr:Ti ratio. The phase composition was far from the phase equilibrium. However, second phase particles of the size below 10 nm were present especially in the Zr-rich alloys. They precipitated preferentially in a fan-shape morphology and electron diffraction identified most of them to be formed by the metastable Al3(ZrxTi1-x) phase with the cubic L12 structure. The grains of the Ti-rich alloys were nearly free of such particles. The coarse particles present in the Ti-rich alloys were mostly constitutional particles in the spectrum of which Fe was found. The microhardness values were found much higher in the Zr-rich alloys. A correspondence between microhardness and solidification microstructure and phase composition was found.

Key words
Al-based alloy for elevated temperatures, rapid solidification, solidification microstructure, microhardness, electron microscopy

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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