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Article: Shear deformation behavior of the austenitic Σ3{1 1 2} twin boundary in NiTi shape memory alloy: an atomistic study

TitleShear deformation behavior of the austenitic Σ3{1 1 2} twin boundary in NiTi shape memory alloy: an atomistic study
Authors
KeywordsShear deformation
Grain boundary
Molecular dynamics
Shape memory alloy
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsusc
Citation
Applied Surface Science, 2020, v. 509, p. article no. 145318 How to Cite?
AbstractMolecular dynamics simulations are performed to study the deformation behavior of the austenitic Σ3{1 1 2} twin boundary (TB) of NiTi alloy under shear loading along different directions at 550 K, which is above the austenite finish temperature (535 K). The results show that the Σ3{1 1 2} TB retards the stress induced martensitic transformation (SIMT) when the TB is sheared along [1 0] but promotes the SIMT when it is sheared along [1 1 ], which is perpendicular to [1 0]. This direction dependence is related to the favorable transformation plane and the lattice correspondence between B2 austenite and B19′ martensite. Besides, the shear directions can be divided into four groups according to the martensite nucleation and growth processes. What is more, B19′ may nucleate firstly in the grain’s interior or from the TB depending on the resolved shear stress. These findings are valuable for the design and application of NiTi alloy devices.
Persistent Identifierhttp://hdl.handle.net/10722/283380
ISSN
2023 Impact Factor: 6.3
2023 SCImago Journal Rankings: 1.210
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChen, Z-
dc.contributor.authorShang, J-
dc.contributor.authorChen, Y-
dc.date.accessioned2020-06-22T02:55:43Z-
dc.date.available2020-06-22T02:55:43Z-
dc.date.issued2020-
dc.identifier.citationApplied Surface Science, 2020, v. 509, p. article no. 145318-
dc.identifier.issn0169-4332-
dc.identifier.urihttp://hdl.handle.net/10722/283380-
dc.description.abstractMolecular dynamics simulations are performed to study the deformation behavior of the austenitic Σ3{1 1 2} twin boundary (TB) of NiTi alloy under shear loading along different directions at 550 K, which is above the austenite finish temperature (535 K). The results show that the Σ3{1 1 2} TB retards the stress induced martensitic transformation (SIMT) when the TB is sheared along [1 0] but promotes the SIMT when it is sheared along [1 1 ], which is perpendicular to [1 0]. This direction dependence is related to the favorable transformation plane and the lattice correspondence between B2 austenite and B19′ martensite. Besides, the shear directions can be divided into four groups according to the martensite nucleation and growth processes. What is more, B19′ may nucleate firstly in the grain’s interior or from the TB depending on the resolved shear stress. These findings are valuable for the design and application of NiTi alloy devices.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsusc-
dc.relation.ispartofApplied Surface Science-
dc.subjectShear deformation-
dc.subjectGrain boundary-
dc.subjectMolecular dynamics-
dc.subjectShape memory alloy-
dc.titleShear deformation behavior of the austenitic Σ3{1 1 2} twin boundary in NiTi shape memory alloy: an atomistic study-
dc.typeArticle-
dc.identifier.emailChen, Y: yuechen@hku.hk-
dc.identifier.authorityChen, Y=rp01925-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.apsusc.2020.145318-
dc.identifier.scopuseid_2-s2.0-85079558585-
dc.identifier.hkuros310518-
dc.identifier.volume509-
dc.identifier.spagearticle no. 145318-
dc.identifier.epagearticle no. 145318-
dc.identifier.isiWOS:000514827600125-
dc.publisher.placeNetherlands-
dc.identifier.issnl0169-4332-

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