Small-scale confined R-phase transformation in Ni47Ti49Fe2-Nb2 alloy

Yuxuan Chen; Yinong Liu; Kaiyuan Yu; Feng Yang; Daqiang Jiang; Yang Ren; Lishan Cui

doi:10.1016/j.mtla.2021.101262

Small-scale confined R-phase transformation in Ni₄₇Ti₄₉Fe₂-Nb₂ alloy

Yuxuan Chen
, Yinong Liu^*
, Kaiyuan Yu
, Feng Yang
, Daqiang Jiang
, Yang Ren
, Lishan Cui^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

15 Citations (Scopus)

Abstract

This study investigated the transformation behaviour of small-scale confined B2→R phase transformation in a Ni₄₇Ti₄₉Fe₂-Nb₂ alloy. Such confined transformation was achieved by introducing a high density of dislocations in the alloy through warm wire drawing. In contrast to the thermally induced B2→R transformation in a conventional polycrystalline matrix with a low dislocation density, where the twined R phase plates of 25 nm in width are formed, the R-phase transformation in the highly confined matrix was found to produce small twinning-free R phase particles of 5 nm in size and to form a reduced c/a ratio.

Original language	English
Article number	101262
Journal	Materialia
Volume	20
Online published	3 Nov 2021
DOIs	https://doi.org/10.1016/j.mtla.2021.101262
Publication status	Published - Dec 2021
Externally published	Yes

Research Keywords

Dislocation
Martensitic transformation
NiTi
R-phase transformation

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@article{86905b390b504cd6886f56005dba3a5e,

title = "Small-scale confined R-phase transformation in Ni47Ti49Fe2-Nb2 alloy",

abstract = "This study investigated the transformation behaviour of small-scale confined B2→R phase transformation in a Ni47Ti49Fe2-Nb2 alloy. Such confined transformation was achieved by introducing a high density of dislocations in the alloy through warm wire drawing. In contrast to the thermally induced B2→R transformation in a conventional polycrystalline matrix with a low dislocation density, where the twined R phase plates of 25 nm in width are formed, the R-phase transformation in the highly confined matrix was found to produce small twinning-free R phase particles of 5 nm in size and to form a reduced c/a ratio.",

keywords = "Dislocation, Martensitic transformation, NiTi, R-phase transformation",

author = "Yuxuan Chen and Yinong Liu and Kaiyuan Yu and Feng Yang and Daqiang Jiang and Yang Ren and Lishan Cui",

year = "2021",

month = dec,

doi = "10.1016/j.mtla.2021.101262",

language = "English",

volume = "20",

}

TY - JOUR

T1 - Small-scale confined R-phase transformation in Ni47Ti49Fe2-Nb2 alloy

AU - Chen, Yuxuan

AU - Liu, Yinong

AU - Yu, Kaiyuan

AU - Yang, Feng

AU - Jiang, Daqiang

AU - Ren, Yang

AU - Cui, Lishan

PY - 2021/12

Y1 - 2021/12

N2 - This study investigated the transformation behaviour of small-scale confined B2→R phase transformation in a Ni47Ti49Fe2-Nb2 alloy. Such confined transformation was achieved by introducing a high density of dislocations in the alloy through warm wire drawing. In contrast to the thermally induced B2→R transformation in a conventional polycrystalline matrix with a low dislocation density, where the twined R phase plates of 25 nm in width are formed, the R-phase transformation in the highly confined matrix was found to produce small twinning-free R phase particles of 5 nm in size and to form a reduced c/a ratio.

AB - This study investigated the transformation behaviour of small-scale confined B2→R phase transformation in a Ni47Ti49Fe2-Nb2 alloy. Such confined transformation was achieved by introducing a high density of dislocations in the alloy through warm wire drawing. In contrast to the thermally induced B2→R transformation in a conventional polycrystalline matrix with a low dislocation density, where the twined R phase plates of 25 nm in width are formed, the R-phase transformation in the highly confined matrix was found to produce small twinning-free R phase particles of 5 nm in size and to form a reduced c/a ratio.

KW - Dislocation

KW - Martensitic transformation

KW - NiTi

KW - R-phase transformation

UR - https://www.scopus.com/pages/publications/85119037315

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85119037315&origin=recordpage

U2 - 10.1016/j.mtla.2021.101262

DO - 10.1016/j.mtla.2021.101262

M3 - RGC 21 - Publication in refereed journal

SN - 2589-1529

VL - 20

JO - Materialia

JF - Materialia

M1 - 101262

ER -