Influence of high pressure torsion on microstructure evolution and mechanical properties of AZ80/SiC magnesium matrix composites

The effect of applying 1, 5 and 10 turns of high pressure torsion (HPT) as a severe plastic deformation technique on the microstructural evolution, hardness, tensile and shear strength of an as-cast AZ80-SiC magnesium matrix composite is investigated in the present study. The results show that HPT a...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2021-10, Vol.826, p.141916, Article 141916
Hauptverfasser:	Akbaripanah, F., Sabbaghian, M., Fakhar, N., Minárik, P., Veselý, J., Hung, P.T., Kapoor, G., Renk, O., Máthis, K., Gubicza, J., Eckert, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	AZ80/SiC matrix composite Dislocation density Evolution Fractions Grain boundaries Grain size Grain structure Hardening Hardness High pressure torsion Magnesium base alloys Mechanical properties Metal matrix composites Microstructure Plastic deformation Recrystallization Room temperature Shear punch test Shear strength Texture
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Zusammenfassung:	The effect of applying 1, 5 and 10 turns of high pressure torsion (HPT) as a severe plastic deformation technique on the microstructural evolution, hardness, tensile and shear strength of an as-cast AZ80-SiC magnesium matrix composite is investigated in the present study. The results show that HPT at room temperature refines the microstructure of the as-cast material having an average grain size of 176 ± 58.9 μm to a fine grain structure with average grain sizes of 4.2 ± 4.1 μm and 2.5 ± 2.1 μm in 5 and 10 turns HPT samples, respectively. In addition, ultra-fine grained regions (grain size
ISSN:	0921-5093 1873-4936
DOI:	10.1016/j.msea.2021.141916