Kink bands promote exceptional fracture resistance in a NbTaTiHf refractory medium-entropy alloy

DH Cook, P Kumar, MI Payne, CH Belcher, P Borges… - Science, 2024 - science.org
Single-phase body-centered cubic (bcc) refractory medium-or high-entropy alloys can retain
compressive strength at elevated temperatures but suffer from extremely low tensile ductility …

Ductile and brittle crack-tip response in equimolar refractory high-entropy alloys

X Li, W Li, DL Irving, LK Varga, L Vitos, S Schönecker - Acta Materialia, 2020 - Elsevier
Understanding the strengthening and deformation mechanisms in refractory high-entropy
alloys (HEAs), proposed as new high-temperature material, is required for improving their …

A fracture-resistant high-entropy alloy for cryogenic applications

B Gludovatz, A Hohenwarter, D Catoor, EH Chang… - Science, 2014 - science.org
High-entropy alloys are equiatomic, multi-element systems that can crystallize as a single
phase, despite containing multiple elements with different crystal structures. A rationale for …

Fracture properties of a refractory high-entropy alloy: In situ micro-cantilever and atom probe tomography studies

Y Zou, P Okle, H Yu, T Sumigawa, T Kitamura, S Maiti… - Scripta materialia, 2017 - Elsevier
Most refractory high-entropy alloys (HEAs) are brittle and suffer from limited formability at
ambient temperature. Previous studies imply that grain boundaries affect their fracture …

[HTML][HTML] Strength can be controlled by edge dislocations in refractory high-entropy alloys

C Lee, F Maresca, R Feng, Y Chou, T Ungar… - Nature …, 2021 - nature.com
Energy efficiency is motivating the search for new high-temperature (high-T) metals. Some
new body-centered-cubic (BCC) random multicomponent “high-entropy alloys (HEAs)” …

Exceptional fracture toughness of CrCoNi-based medium-and high-entropy alloys at 20 kelvin

D Liu, Q Yu, S Kabra, M Jiang, P Forna-Kreutzer… - Science, 2022 - science.org
CrCoNi-based medium-and high-entropy alloys display outstanding damage tolerance,
especially at cryogenic temperatures. In this study, we examined the fracture toughness …

Strong work-hardenable body-centered-cubic high-entropy alloys at cryogenic temperature

X Wen, L Zhu, M Naeem, H Huang, S Jiang, H Wang… - Scripta Materialia, 2023 - Elsevier
Body-centered cubic (BCC) metals and alloys are usually brittle with limited strain hardening
capability at cryogenic temperatures due to the restricted dislocation nucleation and mobility …

Remarkably high fracture toughness of HfNbTaTiZr refractory high-entropy alloy

XJ Fan, RT Qu, ZF Zhang - Journal of Materials Science & Technology, 2022 - Elsevier
High-entropy alloys (HEAs) with face-centered cubic (FCC) phase such as CoCrFeMnNi or
CoCrNi generally exhibit ultra-high fracture toughness but relatively low strength. In contrast …

Edge-dislocation-induced ultrahigh elevated-temperature strength of HfMoNbTaW refractory high-entropy alloys

KK Tseng, HH Huang, WR Wang, JW Yeh… - … and Technology of …, 2022 - Taylor & Francis
Over 150 refractory high-entropy alloys (RHEAs) have been proposed in the last decade.
Early alloys such as MoNbTaW and MoNbTaVW still show an unparalleled yield strength of …

Natural-mixing guided design of refractory high-entropy alloys with as-cast tensile ductility

S Wei, SJ Kim, J Kang, Y Zhang, Y Zhang, T Furuhara… - Nature Materials, 2020 - nature.com
Metallic alloys containing multiple principal alloying elements have created a growing
interest in exploring the property limits of metals and understanding the underlying physical …