Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||High entropy alloy FeMnNiCoCr coatings: enhanced hardness and damage-tolerance through a dual-phase structure and nanotwins|
|Citation:||Surface and Coatings Technology, 2020; 385:125435-1-125435-11|
|Chuhan Sha, Zhifeng Zhou, Zonghan Xie, Paul Munroe|
|Abstract:||Three FeMnNiCoCr high entropy alloy (HEA) coatings were deposited onto M2 steel substrates using a direct current (DC) magnetron sputtering system under a range of substrate bias voltages (−20 V, −60 V and −120 V). The microstructure transformed from a fine elongated structure to coarse V-shaped columnar grains with increasing substrate bias voltage. A high density of nanotwins, together with the presence of a partial fcc-to-hcp transformation, was observed in the coating deposited at −120 V. This was attributed to the introduction of stacking faults whose presence was promoted by preferential re-sputtering effects during the deposition process. A high hardness value of ~9.1 GPa, accompanied by exceptional damage-tolerance, was achieved in the coating deposited at −120 V. Here, the formation of nanotwins and the dual-phase structure was found to contribute to this remarkable combination of hardness and resistance to plastic deformation.|
|Keywords:||High entropy alloy; nanotwins; dual phase; hardness; damage tolerance|
|Rights:||© 2020 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Physics 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.