Martensite destabilization in Au<inf>7</inf>Cu<inf>5</inf>Al<inf>4</inf> shape-memory alloy

Bhatia, VK; Kealley, CS; Prior, MJ; Cortie, MB

Martensite destabilization in Au<inf>7</inf>Cu<inf>5</inf>Al<inf>4</inf> shape-memory alloy

Bhatia, VK

Kealley, CS Prior, MJ Cortie, MB

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Publication Type:: Journal Article
Citation:: Acta Materialia, 2011, 59 (5), pp. 2193 - 2200
Issue Date:: 2011-03-01

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Field	Value	Language
dc.contributor.author	Bhatia, VK https://orcid.org/0000-0003-1804-4231	en_US
dc.contributor.author	Kealley, CS	en_US
dc.contributor.author	Prior, MJ	en_US
dc.contributor.author	Cortie, MB https://orcid.org/0000-0003-3202-6398	en_US
dc.date.issued	2011-03-01	en_US
dc.identifier.citation	Acta Materialia, 2011, 59 (5), pp. 2193 - 2200	en_US
dc.identifier.issn	1359-6454	en_US
dc.identifier.uri	http://hdl.handle.net/10453/15267
dc.description.abstract	Aging-induced changes in the austenite peak (AP) temperature of Au7Cu5Al4 shape-memory alloy are investigated. Whereas heat treating the parent phase at temperatures >140 °C or aging the martensite for long times at room temperature both stabilized the A P to ∼80 °C, low-temperature excursions into the parent phase caused the subsequent AP to drop to ∼60 °C and the transformation hysteresis to decrease. The evidence indicates that this destabilization of the martensite is caused by time-dependent relaxation of elastic constraint due to parent-phase lath migration during the preceding low-temperature austenitizing treatment. This mechanism of aging is different from that of the better-known symmetry-conforming short-range order phenomenon. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.	en_US
dc.relation.ispartof	Acta Materialia	en_US
dc.relation.isbasedon	10.1016/j.actamat.2010.12.021	en_US
dc.subject.classification	Materials	en_US
dc.title	Martensite destabilization in Au<inf>7</inf>Cu<inf>5</inf>Al<inf>4</inf> shape-memory alloy	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.citation.volume	59	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	0913 Mechanical Engineering	en_US
dc.location.activity	WOS:000287775400033	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	open_access
pubs.issue	5	en_US
pubs.publication-status	Published	en_US
pubs.volume	59	en_US

Abstract:

Aging-induced changes in the austenite peak (AP) temperature of Au7Cu5Al4 shape-memory alloy are investigated. Whereas heat treating the parent phase at temperatures >140 °C or aging the martensite for long times at room temperature both stabilized the A P to ∼80 °C, low-temperature excursions into the parent phase caused the subsequent AP to drop to ∼60 °C and the transformation hysteresis to decrease. The evidence indicates that this destabilization of the martensite is caused by time-dependent relaxation of elastic constraint due to parent-phase lath migration during the preceding low-temperature austenitizing treatment. This mechanism of aging is different from that of the better-known symmetry-conforming short-range order phenomenon. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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http://hdl.handle.net/10453/15267