Formation of Lateral Sliver Defects in the Platform Region of Single-Crystal Superalloy Turbine Blades

Dejian Sun; Lin Liu; Taiwen Huang; Wenchao Yang; Chuang He; Zhuoran Li; Jun Zhang; Hengzhi Fu

doi:10.1007/s11661-018-5060-y

Formation of Lateral Sliver Defects in the Platform Region of Single-Crystal Superalloy Turbine Blades

Dejian Sun, Lin Liu, Taiwen Huang, Wenchao Yang, Chuang He, Zhuoran Li, Jun Zhang, Hengzhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

19 Scopus citations

Abstract

Sliver defects are known to extend along the casting axial direction. In this study, the lateral sliver defects on the platform base of single-crystal (SX) superalloy turbine blades were detected by macrocorrosion and electron backscattering diffraction. It was identified that misorientation between adjacent sliver textures was limited within medium-angle misorientation defects (10.5 deg). Moreover, the lateral sliver defects were more prone to occurring at a lower withdrawal rate. Based on the evolution of thermal profile and stress contours, the high stresses around the boundary between the blade body and the platform region were supposed to be the formation mechanism of lateral sliver defects.

Original language	English
Pages (from-to)	1119-1124
Number of pages	6
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	50
Issue number	3
DOIs	https://doi.org/10.1007/s11661-018-5060-y
State	Published - 15 Mar 2019

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title = "Formation of Lateral Sliver Defects in the Platform Region of Single-Crystal Superalloy Turbine Blades",

abstract = "Sliver defects are known to extend along the casting axial direction. In this study, the lateral sliver defects on the platform base of single-crystal (SX) superalloy turbine blades were detected by macrocorrosion and electron backscattering diffraction. It was identified that misorientation between adjacent sliver textures was limited within medium-angle misorientation defects (10.5 deg). Moreover, the lateral sliver defects were more prone to occurring at a lower withdrawal rate. Based on the evolution of thermal profile and stress contours, the high stresses around the boundary between the blade body and the platform region were supposed to be the formation mechanism of lateral sliver defects.",

author = "Dejian Sun and Lin Liu and Taiwen Huang and Wenchao Yang and Chuang He and Zhuoran Li and Jun Zhang and Hengzhi Fu",

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T1 - Formation of Lateral Sliver Defects in the Platform Region of Single-Crystal Superalloy Turbine Blades

AU - Sun, Dejian

AU - Liu, Lin

AU - Huang, Taiwen

AU - Yang, Wenchao

AU - He, Chuang

AU - Li, Zhuoran

AU - Zhang, Jun

AU - Fu, Hengzhi

PY - 2019/3/15

Y1 - 2019/3/15

N2 - Sliver defects are known to extend along the casting axial direction. In this study, the lateral sliver defects on the platform base of single-crystal (SX) superalloy turbine blades were detected by macrocorrosion and electron backscattering diffraction. It was identified that misorientation between adjacent sliver textures was limited within medium-angle misorientation defects (10.5 deg). Moreover, the lateral sliver defects were more prone to occurring at a lower withdrawal rate. Based on the evolution of thermal profile and stress contours, the high stresses around the boundary between the blade body and the platform region were supposed to be the formation mechanism of lateral sliver defects.

AB - Sliver defects are known to extend along the casting axial direction. In this study, the lateral sliver defects on the platform base of single-crystal (SX) superalloy turbine blades were detected by macrocorrosion and electron backscattering diffraction. It was identified that misorientation between adjacent sliver textures was limited within medium-angle misorientation defects (10.5 deg). Moreover, the lateral sliver defects were more prone to occurring at a lower withdrawal rate. Based on the evolution of thermal profile and stress contours, the high stresses around the boundary between the blade body and the platform region were supposed to be the formation mechanism of lateral sliver defects.

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SN - 1073-5623

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Formation of Lateral Sliver Defects in the Platform Region of Single-Crystal Superalloy Turbine Blades

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