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https://hdl.handle.net/2440/114738
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dc.contributor.author | Cao, F. | - |
dc.contributor.author | Munroe, P. | - |
dc.contributor.author | Zhou, Z. | - |
dc.contributor.author | Xie, Z. | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Surface and Coatings Technology, 2018; 350:596-602 | - |
dc.identifier.issn | 0257-8972 | - |
dc.identifier.issn | 1879-3347 | - |
dc.identifier.uri | http://hdl.handle.net/2440/114738 | - |
dc.description | Available online 20 July 2018 | - |
dc.description.abstract | Medium entropy alloys (MEAs), such as CoCrNi, have been demonstrated to combine high hardness and excellent ductility, thereby outperforming many high entropy alloys reported to date. In this study, a multilayered CoCrNi/Ti coating was deposited onto a M2 steel substrate using a DC magnetron sputtering system. Columnar grains can be observed in both the CoCrNi and Ti layers. A high density of periodic twin boundaries, aligned in a direction normal to the growth direction, was also observed within the columnar CoCrNi grains. Moreover, different crystal structures were identified for different CoCrNi layers. The outermost CoCrNi layer exhibited a FCC structure, whilst in contrast, both the middle and bottom CoCrNi layers exhibited a BCC structure. It was assumed that Shockley partial dislocations were responsible for the FCC to BCC transition occurring in both the bottom and middle CoCrNi layers. A high hardness of ~7.6 GPa and elastic modulus of ~233 GPa were determined for this multilayered coating by nanoindentation testing. Further, extraordinary damage tolerance was found in the multilayered CoCrNi/Ti coating under indentation loading. The steady shear banding behaviour during deformation may benefit energy dissipation and promote structural plasticity. | - |
dc.description.statementofresponsibility | Fuyang Cao, Paul Munroe, Zhifeng Zhou, Zonghan Xie | - |
dc.language.iso | en | - |
dc.publisher | Elsevier BV | - |
dc.rights | © 2018 Elsevier B.V. All rights reserved. | - |
dc.source.uri | http://dx.doi.org/10.1016/j.surfcoat.2018.07.066 | - |
dc.subject | CoCrNi; multilayer; nanotwinned structure; shear banding; damage tolerance | - |
dc.title | Microstructure and mechanical properties of a multilayered CoCrNi/Ti coating with varying crystal structure | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.surfcoat.2018.07.066 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP150102417 | - |
pubs.publication-status | Published | - |
Appears in Collections: | Aurora harvest 8 Mechanical Engineering publications |
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