Powder-Route Synthesis and Mechanical Testing of Ultrafine Grain Tungsten Alloys

TitlePowder-Route Synthesis and Mechanical Testing of Ultrafine Grain Tungsten Alloys
Publication TypeJournal Article
Year of Publication2014
AuthorsCordero, ZC, Huskins, EL, Park, M, Livers, S, Frary, M, Schuster, BE, Schuh, CA
JournalMetallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Volume45A
Issue8
Pagination3609 - 3618
Date Published2014/07//
Abstract

We report a W-rich alloy (W-7Cr-9Fe, at. pct) produced by high-energy ball milling, with alloying additions that both lower the densification temperature and retard grain growth. The alloy's consolidation behavior and the resultant compacts' microstructure and mechanical properties are explored. Under one condition, a 98 pct dense compact with a mean grain size of 130 nm was achieved, and exhibited a hardness of 13.5 GPa, a dynamic uniaxial yield strength of 4.14 GPa in Kolsky bar experiments, and signs of structural shear localization during deformation.