Home HOME Kovove Materialy-Metallic Materials 2017 Metallic Materials Vol. 55 (2017), no. 3, pp.195-203

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Metallic Materials Vol. 55 (2017), no. 3, pp.195-203

Title: Saffil alumina fibers reinforced dual-phase Mg-Li and Mg-Li-Zn alloys
Author: S. KUDELA Jr., P. ŠVEC, O. BAJANA, Ľ. OROVČÍK, P. RANACHOWSKI, Z. RANACHOWSKI
Abstract: The gas pressure infiltration technique was used to prepare Saffil alumina fibers reinforced Mg-Li and Mg-Li-Zn matrix composites with a dual-phase matrix structure. There was investigated the effect of variable Li content (6.2–10.3 wt.% Li) and Zn alloying (~ 1.5 wt.% Zn) on the proof stress Rp0.2 of prepared composites. Rp0.2 values increased monotonously with rising fraction of Saffil fibers (5, 10 and 15 vol.%) reaching the maximum of about 250 MPa for Mg-Li matrix composites. Rp0.2 values of Mg-Li-Zn matrix composites were lower. Strengthening effect of Saffil fibers was promoted by the displacement redox reaction with Mg-Li and Mg-Li-Zn melts in which participated significantly only Li. Zn alloying retarded the displacement redox reaction. Too extensive reaction, however, resulted in the fiber damage and drop in composite strength.
Keywords: Mg-Li alloys, Saffil fibers, metal matrix composites, short-fiber strengthening, reactive wetting, displacement reactions
Published online: 06-Jun-2017
Year: 2017, Volume: 55, Issue: 3 Page From: 195, Page To: 203
doi:10.4149/km_2017_3_195


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