Multi-scale characterization of stray grain in the platform of nickel-base single crystal turbine blade

Yafeng Li; Lin Liu; Taiwen Huang; Haifeng Wang; Jun Zhang; Hengzhi Fu

doi:10.1016/j.vacuum.2016.06.016

Multi-scale characterization of stray grain in the platform of nickel-base single crystal turbine blade

Yafeng Li, Lin Liu, Taiwen Huang, Haifeng Wang, Jun Zhang, Hengzhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

29 Scopus citations

Abstract

Through comparatively characterizing the platforms with and without stray grain in multi-scale levels, it is determined that stray grain (SG) originates from heterogeneous nucleation with randomly distributed orientations with respect to the matrix grain. This independently nucleated deleterious grain constitutes distinct macro, dendritic and γ′ morphologies and forms a high angle boundary (HAB) in the conjunction area of SG and the matrix grain. Compositional distribution reveals that severe segregation could be identified in GB area due to compositional enrichment and deprivation during the last stage of solidification.

Original language	English
Pages (from-to)	181-187
Number of pages	7
Journal	Vacuum
Volume	131
DOIs	https://doi.org/10.1016/j.vacuum.2016.06.016
State	Published - 1 Sep 2016

Keywords

Characterization
Directional solidification
Nickel-base superalloy
Stray grain

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title = "Multi-scale characterization of stray grain in the platform of nickel-base single crystal turbine blade",

abstract = "Through comparatively characterizing the platforms with and without stray grain in multi-scale levels, it is determined that stray grain (SG) originates from heterogeneous nucleation with randomly distributed orientations with respect to the matrix grain. This independently nucleated deleterious grain constitutes distinct macro, dendritic and γ′ morphologies and forms a high angle boundary (HAB) in the conjunction area of SG and the matrix grain. Compositional distribution reveals that severe segregation could be identified in GB area due to compositional enrichment and deprivation during the last stage of solidification.",

keywords = "Characterization, Directional solidification, Nickel-base superalloy, Stray grain",

author = "Yafeng Li and Lin Liu and Taiwen Huang and Haifeng Wang and Jun Zhang and Hengzhi Fu",

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AU - Li, Yafeng

AU - Liu, Lin

AU - Huang, Taiwen

AU - Wang, Haifeng

AU - Zhang, Jun

AU - Fu, Hengzhi

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Through comparatively characterizing the platforms with and without stray grain in multi-scale levels, it is determined that stray grain (SG) originates from heterogeneous nucleation with randomly distributed orientations with respect to the matrix grain. This independently nucleated deleterious grain constitutes distinct macro, dendritic and γ′ morphologies and forms a high angle boundary (HAB) in the conjunction area of SG and the matrix grain. Compositional distribution reveals that severe segregation could be identified in GB area due to compositional enrichment and deprivation during the last stage of solidification.

AB - Through comparatively characterizing the platforms with and without stray grain in multi-scale levels, it is determined that stray grain (SG) originates from heterogeneous nucleation with randomly distributed orientations with respect to the matrix grain. This independently nucleated deleterious grain constitutes distinct macro, dendritic and γ′ morphologies and forms a high angle boundary (HAB) in the conjunction area of SG and the matrix grain. Compositional distribution reveals that severe segregation could be identified in GB area due to compositional enrichment and deprivation during the last stage of solidification.

KW - Characterization

KW - Directional solidification

KW - Nickel-base superalloy

KW - Stray grain

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SN - 0042-207X

VL - 131

SP - 181

EP - 187

JO - Vacuum

JF - Vacuum

ER -

Multi-scale characterization of stray grain in the platform of nickel-base single crystal turbine blade

Abstract

Keywords

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