Severe plastic deformation close to the melting point enables Mg-Fe nanocomposites with exceptional strength
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In: Scripta materialia, Vol. 230.2023, No. June, 115428, 06.2023.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Severe plastic deformation close to the melting point enables Mg-Fe nanocomposites with exceptional strength
AU - Roostaei, Milad
AU - Uggowitzer, Peter
AU - Pippan, Reinhard
AU - Renk, Oliver
N1 - Publisher Copyright: © 2023 The Authors
PY - 2023/6
Y1 - 2023/6
N2 - The attractive properties of Mg-bcc nanocomposites have gained increasing interest, but fabrication to bulk scales failed so far as strain immediately localizes within the Mg-phase. Targeting successful processing strategies, we analyze the deformation behavior and resulting microstructures of Mg-Fe composites as a function of applied strain and processing temperature using high-pressure torsion. Counterintuitively, processing at 73% of Mg's melting point accelerated microstructural refinement and improved homogeneity. Suppressing strain localization of the phases, a three-fold hardness increase compared to ambient processing is obtained. Such hardness levels suggest that further optimization likely paves the way towards bulk Mg-based materials beyond a gigapascal strength.
AB - The attractive properties of Mg-bcc nanocomposites have gained increasing interest, but fabrication to bulk scales failed so far as strain immediately localizes within the Mg-phase. Targeting successful processing strategies, we analyze the deformation behavior and resulting microstructures of Mg-Fe composites as a function of applied strain and processing temperature using high-pressure torsion. Counterintuitively, processing at 73% of Mg's melting point accelerated microstructural refinement and improved homogeneity. Suppressing strain localization of the phases, a three-fold hardness increase compared to ambient processing is obtained. Such hardness levels suggest that further optimization likely paves the way towards bulk Mg-based materials beyond a gigapascal strength.
UR - http://www.scopus.com/inward/record.url?scp=85150264018&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2023.115428
DO - 10.1016/j.scriptamat.2023.115428
M3 - Article
VL - 230.2023
JO - Scripta materialia
JF - Scripta materialia
SN - 1359-6462
IS - June
M1 - 115428
ER -
