Thermodynamics calculation and analysis of oxide inclusion formation in single crystal superalloy DD6

Hai Bin Qiao; Lin Liu; Xin Bao Zhao; Xin Tang; Jun Zhang; Heng Zhi Fu; Xiang Hui Li; La Mei Cao

doi:10.3969/j.issn.1001-4381.2013.07.015

Thermodynamics calculation and analysis of oxide inclusion formation in single crystal superalloy DD6

Hai Bin Qiao, Lin Liu, Xin Bao Zhao, Xin Tang, Jun Zhang, Heng Zhi Fu, Xiang Hui Li, La Mei Cao

School of Materials Sience and Engineering

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

4 Scopus citations

Abstract

Calculation and analysis on the thermodynamics conditions for the formation of oxide inclusion during the vacuum induction melting of Ni-based single crystal superalloy DD6 have been carried out by using Thermo-calc thermodynamics software and JMatPro analysis software. The results show that the main oxide inclusion is Al₂O₃. Under the thermodynamic equilibrium state, the value of oxygen activity during the melting and solidification stages is within (3.21-14.0)×10^-7 and (1.63-4.89)× 10^-8. It will cause increasing oxygen in the molten liquid and the formation of Al₂O₃ inclusion by using CaO crucible when the vacuum level is 0.lPa. In order to make the content of Al₂O₃ inclusion reduce to less than 10×10^-6, it is necessary to control oxygen content below 4.709×10^-6 before alloying treatment.

Original language	English
Pages (from-to)	78-82+96
Journal	Cailiao Gongcheng/Journal of Materials Engineering
Issue number	7
DOIs	https://doi.org/10.3969/j.issn.1001-4381.2013.07.015
State	Published - Jul 2013

Keywords

DD6
Oxygen activity
Thermodynamics calculation

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10.3969/j.issn.1001-4381.2013.07.015

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title = "Thermodynamics calculation and analysis of oxide inclusion formation in single crystal superalloy DD6",

abstract = "Calculation and analysis on the thermodynamics conditions for the formation of oxide inclusion during the vacuum induction melting of Ni-based single crystal superalloy DD6 have been carried out by using Thermo-calc thermodynamics software and JMatPro analysis software. The results show that the main oxide inclusion is Al2O3. Under the thermodynamic equilibrium state, the value of oxygen activity during the melting and solidification stages is within (3.21-14.0)×10-7 and (1.63-4.89)× 10-8. It will cause increasing oxygen in the molten liquid and the formation of Al2O3 inclusion by using CaO crucible when the vacuum level is 0.lPa. In order to make the content of Al2O3 inclusion reduce to less than 10×10-6, it is necessary to control oxygen content below 4.709×10-6 before alloying treatment.",

keywords = "DD6, Oxygen activity, Thermodynamics calculation",

author = "Qiao, {Hai Bin} and Lin Liu and Zhao, {Xin Bao} and Xin Tang and Jun Zhang and Fu, {Heng Zhi} and Li, {Xiang Hui} and Cao, {La Mei}",

year = "2013",

month = jul,

doi = "10.3969/j.issn.1001-4381.2013.07.015",

language = "英语",

pages = "78--82+96",

journal = "Cailiao Gongcheng/Journal of Materials Engineering",

issn = "1001-4381",

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TY - JOUR

T1 - Thermodynamics calculation and analysis of oxide inclusion formation in single crystal superalloy DD6

AU - Qiao, Hai Bin

AU - Liu, Lin

AU - Zhao, Xin Bao

AU - Tang, Xin

AU - Zhang, Jun

AU - Fu, Heng Zhi

AU - Li, Xiang Hui

AU - Cao, La Mei

PY - 2013/7

Y1 - 2013/7

N2 - Calculation and analysis on the thermodynamics conditions for the formation of oxide inclusion during the vacuum induction melting of Ni-based single crystal superalloy DD6 have been carried out by using Thermo-calc thermodynamics software and JMatPro analysis software. The results show that the main oxide inclusion is Al2O3. Under the thermodynamic equilibrium state, the value of oxygen activity during the melting and solidification stages is within (3.21-14.0)×10-7 and (1.63-4.89)× 10-8. It will cause increasing oxygen in the molten liquid and the formation of Al2O3 inclusion by using CaO crucible when the vacuum level is 0.lPa. In order to make the content of Al2O3 inclusion reduce to less than 10×10-6, it is necessary to control oxygen content below 4.709×10-6 before alloying treatment.

AB - Calculation and analysis on the thermodynamics conditions for the formation of oxide inclusion during the vacuum induction melting of Ni-based single crystal superalloy DD6 have been carried out by using Thermo-calc thermodynamics software and JMatPro analysis software. The results show that the main oxide inclusion is Al2O3. Under the thermodynamic equilibrium state, the value of oxygen activity during the melting and solidification stages is within (3.21-14.0)×10-7 and (1.63-4.89)× 10-8. It will cause increasing oxygen in the molten liquid and the formation of Al2O3 inclusion by using CaO crucible when the vacuum level is 0.lPa. In order to make the content of Al2O3 inclusion reduce to less than 10×10-6, it is necessary to control oxygen content below 4.709×10-6 before alloying treatment.

KW - DD6

KW - Oxygen activity

KW - Thermodynamics calculation

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U2 - 10.3969/j.issn.1001-4381.2013.07.015

DO - 10.3969/j.issn.1001-4381.2013.07.015

M3 - 文章

AN - SCOPUS:84881001038

SN - 1001-4381

SP - 78-82+96

JO - Cailiao Gongcheng/Journal of Materials Engineering

JF - Cailiao Gongcheng/Journal of Materials Engineering

IS - 7

ER -

Thermodynamics calculation and analysis of oxide inclusion formation in single crystal superalloy DD6

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Keywords

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