X-ray microdiffraction and EBSD study of FSP induced structural/phase transitions in a Ni-based superalloy

Oleg M. Barabash; Rozaliya I. Barabash; Gene E. Ice; Zhili Feng; David Gandy

doi:10.1016/j.msea.2009.03.086

X-ray microdiffraction and EBSD study of FSP induced structural/phase transitions in a Ni-based superalloy

Oleg M. Barabash
, Rozaliya I. Barabash
, Gene E. Ice
, Zhili Feng
, David Gandy

Materials Joining

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

19 Scopus citations

Abstract

Severe plastic deformation during Friction Stir Processing (FSP) of an IN738 Ni-based superalloy was studied by means of X-ray polychromatic microdiffraction, EBSD, scanning electron and optical microscopies. Modeling of the physical properties and phase composition was also performed. Several distinct zones are formed during FSP including a stir zone (SZ), a thermal-mechanical affected zone (TMAZ) and a heat affected zone (HAZ). Each zone has distinct microstructure after FSP. The initial dendrite structure is preserved in the HAZ, while strengthening γ′-phase particles partially dissolve and coagulate. Plastic deformation of the base material dendrites takes place in the TMAZ and a large number of geometrically necessary dislocations are formed. The extent of deformation increases toward the SZ and the dendrite structure is completely destroyed in the SZ and replaced by a fine submicrocrystallinne microstructure.

Original language	English
Pages (from-to)	10-19
Number of pages	10
Journal	Materials Science and Engineering: A
Volume	524
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2009.03.086
State	Published - Oct 25 2009

Funding

Experimental research is supported by the Division of Materials Science and Engineering, Office of Basic Energy Science and the ORNL SHARE user facility, U.S. Department of Energy. Synchrotron measurements on Unicat beamline 34-ID at the Advanced Photon Source (APS), were also supported by the U.S. Department of Energy, Office of Science.

Keywords

EBSD
Friction stir processing
Ni-based superalloy
X-ray diffraction

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10.1016/j.msea.2009.03.086

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title = "X-ray microdiffraction and EBSD study of FSP induced structural/phase transitions in a Ni-based superalloy",

abstract = "Severe plastic deformation during Friction Stir Processing (FSP) of an IN738 Ni-based superalloy was studied by means of X-ray polychromatic microdiffraction, EBSD, scanning electron and optical microscopies. Modeling of the physical properties and phase composition was also performed. Several distinct zones are formed during FSP including a stir zone (SZ), a thermal-mechanical affected zone (TMAZ) and a heat affected zone (HAZ). Each zone has distinct microstructure after FSP. The initial dendrite structure is preserved in the HAZ, while strengthening γ′-phase particles partially dissolve and coagulate. Plastic deformation of the base material dendrites takes place in the TMAZ and a large number of geometrically necessary dislocations are formed. The extent of deformation increases toward the SZ and the dendrite structure is completely destroyed in the SZ and replaced by a fine submicrocrystallinne microstructure.",

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doi = "10.1016/j.msea.2009.03.086",

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T1 - X-ray microdiffraction and EBSD study of FSP induced structural/phase transitions in a Ni-based superalloy

AU - Barabash, Oleg M.

AU - Barabash, Rozaliya I.

AU - Ice, Gene E.

AU - Feng, Zhili

AU - Gandy, David

PY - 2009/10/25

Y1 - 2009/10/25

N2 - Severe plastic deformation during Friction Stir Processing (FSP) of an IN738 Ni-based superalloy was studied by means of X-ray polychromatic microdiffraction, EBSD, scanning electron and optical microscopies. Modeling of the physical properties and phase composition was also performed. Several distinct zones are formed during FSP including a stir zone (SZ), a thermal-mechanical affected zone (TMAZ) and a heat affected zone (HAZ). Each zone has distinct microstructure after FSP. The initial dendrite structure is preserved in the HAZ, while strengthening γ′-phase particles partially dissolve and coagulate. Plastic deformation of the base material dendrites takes place in the TMAZ and a large number of geometrically necessary dislocations are formed. The extent of deformation increases toward the SZ and the dendrite structure is completely destroyed in the SZ and replaced by a fine submicrocrystallinne microstructure.

AB - Severe plastic deformation during Friction Stir Processing (FSP) of an IN738 Ni-based superalloy was studied by means of X-ray polychromatic microdiffraction, EBSD, scanning electron and optical microscopies. Modeling of the physical properties and phase composition was also performed. Several distinct zones are formed during FSP including a stir zone (SZ), a thermal-mechanical affected zone (TMAZ) and a heat affected zone (HAZ). Each zone has distinct microstructure after FSP. The initial dendrite structure is preserved in the HAZ, while strengthening γ′-phase particles partially dissolve and coagulate. Plastic deformation of the base material dendrites takes place in the TMAZ and a large number of geometrically necessary dislocations are formed. The extent of deformation increases toward the SZ and the dendrite structure is completely destroyed in the SZ and replaced by a fine submicrocrystallinne microstructure.

KW - EBSD

KW - Friction stir processing

KW - Ni-based superalloy

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/69249094162

U2 - 10.1016/j.msea.2009.03.086

DO - 10.1016/j.msea.2009.03.086

M3 - Article

AN - SCOPUS:69249094162

SN - 0921-5093

VL - 524

SP - 10

EP - 19

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2

ER -

X-ray microdiffraction and EBSD study of FSP induced structural/phase transitions in a Ni-based superalloy

Abstract

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Keywords

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