Snoek-type damping performance in strong and ductile high-entropy alloys.

ABSTRACT: Noise and mechanical vibrations not only cause damage to devices, but also present major public health hazards. High-damping alloys that eliminate noise and mechanical vibrations are therefore required. Yet, low operating temperatures and insufficient strength/ductility ratios in currently available high-damping alloys limit their applicability. Using the concept of high-entropy alloy (HEA), we present a class of high-damping materials. The design is based on refractory HEAs, solid-solutions doped with either 2.0 atomic % oxygen or nitrogen, (Ta0.5Nb0.5HfZrTi)₉₈O₂ and (Ta0.5Nb0.5HfZrTi)₉₈N₂. Via Snoek relaxation and ordered interstitial complexes mediated strain hardening, the damping capacity of these HEAs is as high as 0.030, and the damping pe

SUBMITTER: Lei Z 

PROVIDER: S-EPMC7299626 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature