Severe plastic deformation close to the melting point enables Mg-Fe nanocomposites with exceptional strength

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

Externe Organisationseinheiten

  • Erich-Schmid-Institut für Materialwissenschaft der Österreichischen Akademie der Wissenschaften

Abstract

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.

Details

OriginalspracheEnglisch
Aufsatznummer115428
Seitenumfang5
FachzeitschriftScripta materialia
Jahrgang230.2023
AusgabenummerJune
Frühes Online-Datum17 März 2023
DOIs
StatusVeröffentlicht - Juni 2023