Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Self-toughened high entropy alloy with a body-centred cubic structure
Author: Tsianikas, S.
Chen, Y.
Jeong, J.
Zhang, S.
Xie, Z.
Citation: Nanoscale, 2021; 13(6):3602-3612
Publisher: Royal Society of Chemistry
Issue Date: 2021
ISSN: 2040-3364
Statement of
Simon Tsianikas, Yujie Chen, Jiwon Jeong, Siyuan Zhang and Zonghan Xie
Abstract: Multiple interstitial elements (B, C and O), were incorporated into a body-centred cubic (BCC) FeMnCoCr-based interstitial high entropy alloy (iHEA). While achieving an impressive yield strength of 2.55 GPa, the new alloy also possesses appreciable ductility under mechanical loading. The unusual combination of hardening effects brought about by interstitial atoms, compositional fluctuations, and fine grain size greatly strengthened the alloy by inhibiting dislocation motion. Moreover, interstitial elements helped reinforce the grain boundaries through segregation and also assisted in tuning the phase stability. The new alloy transformed from the BCC to hexagonal closed-packed (HCP) phase initially. With increasing load the HCP phase was gradually converted into face-centred cubic (FCC); the resultant HCP/FCC nanolaminates enhanced plasticity via strain partitioning. Under higher loads, the FCC phase became dominant, giving rise to deformation twinning. Taken together, the newly developed BCC structured iHEA affords not only high strength, but also confers remarkable ductility through multiple deformation pathways.
Rights: This journal is © The Royal Society of Chemistry 2021
DOI: 10.1039/d0nr06798a
Grant ID:
Published version:
Appears in Collections:Aurora harvest 4
Mechanical Engineering publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.