Microstructure and stress rupture properties of single crystal superalloy CMSX-2 under high thermal gradient directional solidification

L. Liu; T. W. Huang; J. Zhang; H. Z. Fu

doi:10.1016/j.matlet.2006.04.037

Microstructure and stress rupture properties of single crystal superalloy CMSX-2 under high thermal gradient directional solidification

L. Liu, T. W. Huang, J. Zhang, H. Z. Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

113 Scopus citations

Abstract

The interface morphologies of single crystal superalloy CMSX-2 were studied over a range of cooling rate with large variations in withdrawal speeds in directional solidification. A superfine cellular structure was obtained under both high thermal gradient up to 1000 K/cm and fast withdrawal rate up to 1 mm/s. The high rate directional solidification results in reduction in primary and secondary dendrite arm spacing, refinement of γ′ phase, reduced microsegregation of alloying elements and smaller size of γ-γ′ eutectics. The rupture life and plasticity of fine structure samples produced in high thermal gradient directional solidification increase significantly than that in conventional directional solidification process at 1323 K.

Original language	English
Pages (from-to)	227-230
Number of pages	4
Journal	Materials Letters
Volume	61
Issue number	1
DOIs	https://doi.org/10.1016/j.matlet.2006.04.037
State	Published - Jan 2007

Keywords

Directional solidification
Mechanical properties
Microstructure
Single crystal
Superalloy

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10.1016/j.matlet.2006.04.037

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title = "Microstructure and stress rupture properties of single crystal superalloy CMSX-2 under high thermal gradient directional solidification",

abstract = "The interface morphologies of single crystal superalloy CMSX-2 were studied over a range of cooling rate with large variations in withdrawal speeds in directional solidification. A superfine cellular structure was obtained under both high thermal gradient up to 1000 K/cm and fast withdrawal rate up to 1 mm/s. The high rate directional solidification results in reduction in primary and secondary dendrite arm spacing, refinement of γ′ phase, reduced microsegregation of alloying elements and smaller size of γ-γ′ eutectics. The rupture life and plasticity of fine structure samples produced in high thermal gradient directional solidification increase significantly than that in conventional directional solidification process at 1323 K.",

keywords = "Directional solidification, Mechanical properties, Microstructure, Single crystal, Superalloy",

author = "L. Liu and Huang, {T. W.} and J. Zhang and Fu, {H. Z.}",

year = "2007",

month = jan,

doi = "10.1016/j.matlet.2006.04.037",

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AU - Liu, L.

AU - Huang, T. W.

AU - Zhang, J.

AU - Fu, H. Z.

PY - 2007/1

Y1 - 2007/1

N2 - The interface morphologies of single crystal superalloy CMSX-2 were studied over a range of cooling rate with large variations in withdrawal speeds in directional solidification. A superfine cellular structure was obtained under both high thermal gradient up to 1000 K/cm and fast withdrawal rate up to 1 mm/s. The high rate directional solidification results in reduction in primary and secondary dendrite arm spacing, refinement of γ′ phase, reduced microsegregation of alloying elements and smaller size of γ-γ′ eutectics. The rupture life and plasticity of fine structure samples produced in high thermal gradient directional solidification increase significantly than that in conventional directional solidification process at 1323 K.

AB - The interface morphologies of single crystal superalloy CMSX-2 were studied over a range of cooling rate with large variations in withdrawal speeds in directional solidification. A superfine cellular structure was obtained under both high thermal gradient up to 1000 K/cm and fast withdrawal rate up to 1 mm/s. The high rate directional solidification results in reduction in primary and secondary dendrite arm spacing, refinement of γ′ phase, reduced microsegregation of alloying elements and smaller size of γ-γ′ eutectics. The rupture life and plasticity of fine structure samples produced in high thermal gradient directional solidification increase significantly than that in conventional directional solidification process at 1323 K.

KW - Directional solidification

KW - Mechanical properties

KW - Microstructure

KW - Single crystal

KW - Superalloy

UR - http://www.scopus.com/inward/record.url?scp=33750628291&partnerID=8YFLogxK

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DO - 10.1016/j.matlet.2006.04.037

M3 - 文章

AN - SCOPUS:33750628291

SN - 0167-577X

VL - 61

SP - 227

EP - 230

JO - Materials Letters

JF - Materials Letters

IS - 1

ER -

Microstructure and stress rupture properties of single crystal superalloy CMSX-2 under high thermal gradient directional solidification

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Keywords

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