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Microstructure and Hardness Evolution in Magnesium Processed by HPT

Microstructure and Hardness Evolution in Magnesium Processed by HPT

Authors :
Shima Sabbaghianrad
Isabela C. Tristão
Cláudio L. P. Silva
Roberto B. Figueiredo
Seyed Alireza Torbati-Sarraf
Terence G. Langdon
Source :
Materials Research, Vol 20, Iss suppl 1, Pp 2-7 (2017), Materials Research v.20 suppl.1 2017, Materials research (São Carlos. Online), Universidade Federal de São Carlos (UFSCAR), instacron:ABM ABC ABPOL, Materials Research, Volume: 20 Supplement 1, Pages: 2-7, Published: 12 SEP 2017, Materials Research, Issue: ahead, Published: 12 SEP 2017
Publication Year :
2017
Publisher :
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol), 2017.

Abstract

High pressure torsion provides an opportunity to process materials with low formability such as magnesium at room temperature. The present work shows the microstructure evolution in commercially pure magnesium processed using a pressure of 6.0 GPa up to 10 turns of rotation. The microstructure evolution is evaluated using electron microscopy and the hardness is determined using dynamic hardness testing. The results show that the grain refinement mechanism in this material differs from materials with b.c.c. and f.c.c. structures. The mechanism of grain refinement observed at high temperatures also applies at room temperature. The hardness distribution is heterogeneous along the longitudinal section of the discs and is not affected by the amount of deformation imposed to the material.

Details

Language :
English
ISSN :
15161439
Volume :
20
Database :
OpenAIRE
Journal :
Materials Research
Accession number :
edsair.doi.dedup.....fa6aa31d0a7402d55b407d28844c9bf2