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Metallurgical and Materials Transactions A
Published in: Metallurgical and Materials Transactions A 3/2019

03-01-2019 | Communication

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

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

Published in: Metallurgical and Materials Transactions A | Issue 3/2019

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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.
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Metadata
Title
Formation of Lateral Sliver Defects in the Platform Region of Single-Crystal Superalloy Turbine Blades
Authors
Dejian Sun
Lin Liu
Taiwen Huang
Wenchao Yang
Chuang He
Zhuoran Li
Jun Zhang
Hengzhi Fu
Publication date
03-01-2019
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 3/2019
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-018-5060-y

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