Tension/compression asymmetry in additive manufactured face centered cubic high entropy alloy

The high entropy alloy, Al0.3CoCrFeNi, has been fabricated by direct laser fabrication and its deformation behaviour studied. This alloy exhibited significant tension/compression asymmetry in its work hardening rate and ductility. The exceptionally high work hardening in compression has been attribu...

Full description

Saved in:
Bibliographic Details
Published in:Scripta materialia 2017-03, Vol.129, p.30-34
Main Authors: Joseph, Jithin, Stanford, Nicole, Hodgson, Peter, Fabijanic, Daniel Mark
Format: Article
Language:English
Subjects:
Critical resolved shear stress for twinning
High entropy alloy
Twinning
Work hardening
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The high entropy alloy, Al0.3CoCrFeNi, has been fabricated by direct laser fabrication and its deformation behaviour studied. This alloy exhibited significant tension/compression asymmetry in its work hardening rate and ductility. The exceptionally high work hardening in compression has been attributed to profuse mechanical twinning which has been exacerbated by a strong texture in the as-cast material. The tensile deformed material did not exhibit any mechanical twinning, deformed exclusively by slip, and therefore showed minimal work hardening and poor ductility. The critical resolved shear stress for twinning of the alloy was found to be approximately 240MPa. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2016.10.023