Evidence of two-length-scale kinetics of R-phase transformation by high-energy X-ray diffraction

Y. D. Wang; Y. Ren; E. W. Huang; G. Wang; Z. H. Nie; L. Zuo; P. K. Liaw

doi:10.1016/j.scriptamat.2010.01.011

Evidence of two-length-scale kinetics of R-phase transformation by high-energy X-ray diffraction

Y. D. Wang^*, Y. Ren, E. W. Huang, G. Wang, Z. H. Nie, L. Zuo, P. K. Liaw

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The cubic-to-rhombohedral (C-R) phase transition in an AuCd shape memory alloy was investigated by in situ high-energy X-ray diffraction. We present the first direct experimental evidence of two-length-scale phase transition kinetics in this alloy system. It was further found that aging in the R-phase leads to two-way memory "loss", characterized by the reselection of new variants. We attributed this two-way memory "loss" to the internal stresses caused by the defects formed in the off-equilibrium state of the studied AuCd system.

Original language	English
Pages (from-to)	617-620
Number of pages	4
Journal	Scripta Materialia
Volume	62
Issue number	8
DOIs	https://doi.org/10.1016/j.scriptamat.2010.01.011
Publication status	Published - Apr 2010

Keywords

Martensitic phase transformation
Phase transformation kinetics
R-phase
Shape memory alloy
X-ray diffraction (XRD)

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10.1016/j.scriptamat.2010.01.011

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title = "Evidence of two-length-scale kinetics of R-phase transformation by high-energy X-ray diffraction",

abstract = "The cubic-to-rhombohedral (C-R) phase transition in an AuCd shape memory alloy was investigated by in situ high-energy X-ray diffraction. We present the first direct experimental evidence of two-length-scale phase transition kinetics in this alloy system. It was further found that aging in the R-phase leads to two-way memory {"}loss{"}, characterized by the reselection of new variants. We attributed this two-way memory {"}loss{"} to the internal stresses caused by the defects formed in the off-equilibrium state of the studied AuCd system.",

keywords = "Martensitic phase transformation, Phase transformation kinetics, R-phase, Shape memory alloy, X-ray diffraction (XRD)",

author = "Wang, {Y. D.} and Y. Ren and Huang, {E. W.} and G. Wang and Nie, {Z. H.} and L. Zuo and Liaw, {P. K.}",

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T1 - Evidence of two-length-scale kinetics of R-phase transformation by high-energy X-ray diffraction

AU - Wang, Y. D.

AU - Ren, Y.

AU - Huang, E. W.

AU - Wang, G.

AU - Nie, Z. H.

AU - Zuo, L.

AU - Liaw, P. K.

PY - 2010/4

Y1 - 2010/4

N2 - The cubic-to-rhombohedral (C-R) phase transition in an AuCd shape memory alloy was investigated by in situ high-energy X-ray diffraction. We present the first direct experimental evidence of two-length-scale phase transition kinetics in this alloy system. It was further found that aging in the R-phase leads to two-way memory "loss", characterized by the reselection of new variants. We attributed this two-way memory "loss" to the internal stresses caused by the defects formed in the off-equilibrium state of the studied AuCd system.

AB - The cubic-to-rhombohedral (C-R) phase transition in an AuCd shape memory alloy was investigated by in situ high-energy X-ray diffraction. We present the first direct experimental evidence of two-length-scale phase transition kinetics in this alloy system. It was further found that aging in the R-phase leads to two-way memory "loss", characterized by the reselection of new variants. We attributed this two-way memory "loss" to the internal stresses caused by the defects formed in the off-equilibrium state of the studied AuCd system.

KW - Martensitic phase transformation

KW - Phase transformation kinetics

KW - R-phase

KW - Shape memory alloy

KW - X-ray diffraction (XRD)

UR - http://www.scopus.com/inward/record.url?scp=76549123862&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2010.01.011

DO - 10.1016/j.scriptamat.2010.01.011

M3 - Article

AN - SCOPUS:76549123862

SN - 1359-6462

VL - 62

SP - 617

EP - 620

JO - Scripta Materialia

JF - Scripta Materialia

IS - 8

ER -

Evidence of two-length-scale kinetics of R-phase transformation by high-energy X-ray diffraction

Abstract

Keywords

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