Grain size and microhardness evolution during annealing of a magnesium alloy processed by high-pressure torsion | Zendy

L. Cupertino-Malheiros | Zendy; Roberto B. Figueiredo | Zendy; Terence G. Langdon | Zendy

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Grain size and microhardness evolution during annealing of a magnesium alloy processed by high-pressure torsion

Author(s) -

L. Cupertino-Malheiros,

Roberto B. Figueiredo,

Terence G. Langdon

Publication year - 2014

Publication title -

journal of materials research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.832

H-Index - 44

eISSN - 2214-0697

pISSN - 2238-7854

DOI - 10.1016/j.jmrt.2014.10.008

Subject(s) - materials science , indentation hardness , annealing (glass) , recrystallization (geology) , grain size , severe plastic deformation , torsion (gastropod) , magnesium alloy , alloy , metallurgy , metallography , microstructure , composite material , medicine , paleontology , surgery , biology

High-pressure torsion (HPT) was used to impose severe plastic deformation on a magnesium alloy AZ31. The material was processed for 0.5, 1, 2, 3, 5 and 7 turns at room temperature under a pressure of 6.0 GPa. Samples were annealed for 1800 s at temperatures of 373 K, 423 K, 473 K, 573 K and 673 K. Microhardness tests and metallography were used to determine the evolution of strength and grain size as a function of the annealing temperature. The results show that recrystallization takes place at temperatures higher than 423 K. The annealing behavior is independent of the number of turns in HPT

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