High temperature, low neutron cross-section high-entropy alloys in the Nb-Ti-V-Zr system

King, DJM; Cheung, STY; Humphry-Baker, SA; Parkin, C; Couet, A; Cortie, MB; Lumpkin, GR; Middleburgh, SC; Knowles, AJ

High temperature, low neutron cross-section high-entropy alloys in the Nb-Ti-V-Zr system

King, DJM Cheung, STY Humphry-Baker, SA Parkin, C Couet, A Cortie, MB

Lumpkin, GR Middleburgh, SC Knowles, AJ

Permalink

Publication Type:: Journal Article
Citation:: Acta Materialia, 2019, 166 pp. 435 - 446
Issue Date:: 2019-03-01

Closed Access

	Filename	Description	Size
	High temperature, low neutron cross-section high-entropy alloys in the Nb-Ti-V-Zr system.pdf	Published Version	3.17 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	King, DJM	en_US
dc.contributor.author	Cheung, STY	en_US
dc.contributor.author	Humphry-Baker, SA	en_US
dc.contributor.author	Parkin, C	en_US
dc.contributor.author	Couet, A	en_US
dc.contributor.author	Cortie, MB https://orcid.org/0000-0003-3202-6398	en_US
dc.contributor.author	Lumpkin, GR	en_US
dc.contributor.author	Middleburgh, SC	en_US
dc.contributor.author	Knowles, AJ	en_US
dc.date.issued	2019-03-01	en_US
dc.identifier.citation	Acta Materialia, 2019, 166 pp. 435 - 446	en_US
dc.identifier.issn	1359-6454	en_US
dc.identifier.uri	http://hdl.handle.net/10453/135410
dc.description.abstract	© 2019 Acta Materialia Inc. High-entropy alloys (HEAs) with high melting points and low thermal neutron cross-section are promising new cladding materials for generation III+ and IV power reactors. In this study a recently developed high throughput computational screening tool Alloy Search and Predict (ASAP) has been used to identify the most likely candidate single-phase HEAs with low thermal neutron cross-section, from over a million four-element equimolar combinations. The selected NbTiVZr HEA was further studied by density functional theory (DFT) for moduli and lattice parameter, and by CALPHAD to predict phase formation with temperature. HEAs of NbTiVZr x (x = 0.5, 1, 2) were produced experimentally, with Zr varied as the dominant cross-section modifier. Contrary to previous experimental work, these HEAs were demonstrated to constitute a single-phase HEA system; a result obtained using a faster cooling rate following annealing at 1200 °C. However, the beta (BCC) matrix decomposed following aging at 700 °C, into a combination of nano-scale beta, alpha (HCP) and C15 Laves phases.	en_US
dc.relation.ispartof	Acta Materialia	en_US
dc.relation.isbasedon	10.1016/j.actamat.2019.01.006	en_US
dc.subject.classification	Materials	en_US
dc.title	High temperature, low neutron cross-section high-entropy alloys in the Nb-Ti-V-Zr system	en_US
dc.type	Journal Article
utslib.citation.volume	166	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	0913 Mechanical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	166	en_US

Abstract:

© 2019 Acta Materialia Inc. High-entropy alloys (HEAs) with high melting points and low thermal neutron cross-section are promising new cladding materials for generation III+ and IV power reactors. In this study a recently developed high throughput computational screening tool Alloy Search and Predict (ASAP) has been used to identify the most likely candidate single-phase HEAs with low thermal neutron cross-section, from over a million four-element equimolar combinations. The selected NbTiVZr HEA was further studied by density functional theory (DFT) for moduli and lattice parameter, and by CALPHAD to predict phase formation with temperature. HEAs of NbTiVZr x (x = 0.5, 1, 2) were produced experimentally, with Zr varied as the dominant cross-section modifier. Contrary to previous experimental work, these HEAs were demonstrated to constitute a single-phase HEA system; a result obtained using a faster cooling rate following annealing at 1200 °C. However, the beta (BCC) matrix decomposed following aging at 700 °C, into a combination of nano-scale beta, alpha (HCP) and C15 Laves phases.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/135410