Interface coherency strain relaxation due to plastic deformation in single crystal Ni-base superalloys

T. K. Liu; G. L. Wu; C. K. Liu; Z. H. Nie; T. Ungár; Y. Ren; Y. D. Wang

doi:10.1016/j.msea.2013.01.035

Interface coherency strain relaxation due to plastic deformation in single crystal Ni-base superalloys

T. K. Liu
, G. L. Wu
, C. K. Liu
, Z. H. Nie
, T. Ungár
, Y. Ren
, Y. D. Wang

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

9 Citations (Scopus)

Abstract

The micromechanical behavior under compression for a cube-oriented single crystal Ni-base superalloy was in-situ studied by synchrotron high energy X-ray diffraction at room temperature. Both elastic and plastic deformation altered the mismatch strain between γ and γ' phases with different variances. The deformation-induced interface coherency strain relaxation was observed after yielding as evidenced by an increment of lattice mismatch and an abnormal decrease in full width at half maximum (FWHM), which is attributed to aggregating of dislocations toward phase boundaries. A dislocation-mismatch model is proposed to correlate the relative change in lattice mismatch and FWHM during deformation, which fits the experiment well. © 2013 Elsevier B.V.

Original language	English
Pages (from-to)	83-87
Journal	Materials Science and Engineering A
Volume	568
DOIs	https://doi.org/10.1016/j.msea.2013.01.035
Publication status	Published - 15 Apr 2013
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Lattice mismatch
Ni-base Superalloys
Plastic deformation
Relaxation
Strain measurement
Synchrotron X-Ray

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title = "Interface coherency strain relaxation due to plastic deformation in single crystal Ni-base superalloys",

abstract = "The micromechanical behavior under compression for a cube-oriented single crystal Ni-base superalloy was in-situ studied by synchrotron high energy X-ray diffraction at room temperature. Both elastic and plastic deformation altered the mismatch strain between γ and γ' phases with different variances. The deformation-induced interface coherency strain relaxation was observed after yielding as evidenced by an increment of lattice mismatch and an abnormal decrease in full width at half maximum (FWHM), which is attributed to aggregating of dislocations toward phase boundaries. A dislocation-mismatch model is proposed to correlate the relative change in lattice mismatch and FWHM during deformation, which fits the experiment well. {\textcopyright} 2013 Elsevier B.V.",

keywords = "Lattice mismatch, Ni-base Superalloys, Plastic deformation, Relaxation, Strain measurement, Synchrotron X-Ray",

author = "Liu, \{T. K.\} and Wu, \{G. L.\} and Liu, \{C. K.\} and Nie, \{Z. H.\} and T. Ung{\'a}r and Y. Ren and Wang, \{Y. D.\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2013",

month = apr,

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doi = "10.1016/j.msea.2013.01.035",

language = "English",

volume = "568",

pages = "83--87",

journal = "Materials Science and Engineering A",

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TY - JOUR

T1 - Interface coherency strain relaxation due to plastic deformation in single crystal Ni-base superalloys

AU - Liu, T. K.

AU - Wu, G. L.

AU - Liu, C. K.

AU - Nie, Z. H.

AU - Ungár, T.

AU - Ren, Y.

AU - Wang, Y. D.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2013/4/15

Y1 - 2013/4/15

N2 - The micromechanical behavior under compression for a cube-oriented single crystal Ni-base superalloy was in-situ studied by synchrotron high energy X-ray diffraction at room temperature. Both elastic and plastic deformation altered the mismatch strain between γ and γ' phases with different variances. The deformation-induced interface coherency strain relaxation was observed after yielding as evidenced by an increment of lattice mismatch and an abnormal decrease in full width at half maximum (FWHM), which is attributed to aggregating of dislocations toward phase boundaries. A dislocation-mismatch model is proposed to correlate the relative change in lattice mismatch and FWHM during deformation, which fits the experiment well. © 2013 Elsevier B.V.

AB - The micromechanical behavior under compression for a cube-oriented single crystal Ni-base superalloy was in-situ studied by synchrotron high energy X-ray diffraction at room temperature. Both elastic and plastic deformation altered the mismatch strain between γ and γ' phases with different variances. The deformation-induced interface coherency strain relaxation was observed after yielding as evidenced by an increment of lattice mismatch and an abnormal decrease in full width at half maximum (FWHM), which is attributed to aggregating of dislocations toward phase boundaries. A dislocation-mismatch model is proposed to correlate the relative change in lattice mismatch and FWHM during deformation, which fits the experiment well. © 2013 Elsevier B.V.

KW - Lattice mismatch

KW - Ni-base Superalloys

KW - Plastic deformation

KW - Relaxation

KW - Strain measurement

KW - Synchrotron X-Ray

UR - https://www.scopus.com/pages/publications/84873482482

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84873482482&origin=recordpage

U2 - 10.1016/j.msea.2013.01.035

DO - 10.1016/j.msea.2013.01.035

M3 - RGC 21 - Publication in refereed journal

SN - 0921-5093

VL - 568

SP - 83

EP - 87

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Interface coherency strain relaxation due to plastic deformation in single crystal Ni-base superalloys

Abstract

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Research Keywords

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