Interdendritic Mo homogenization and sub-solidus melting during solution treatment in the Mo-strengthening single crystal superalloys

Yi Ru; Shusuo Li; Yanling Pei; Jian Zhou; Shengkai Gong; Huibin Xu

doi:10.1016/j.jallcom.2015.12.053

Interdendritic Mo homogenization and sub-solidus melting during solution treatment in the Mo-strengthening single crystal superalloys

Yi Ru
, Shusuo Li
, Yanling Pei
, Jian Zhou
, Shengkai Gong^*
, Huibin Xu

^*Corresponding author for this work

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

21 Scopus citations

Abstract

The interdendritic Mo homogenization and relevant sub-solidus melting are investigated in detail during solution treatment for Mo-strengthening single crystal superalloys. During solidification, NiMo-γ eutectics and Ni₂Mo phases precipitate from the residual liquid and the Mo super-saturated interdendritic γ channel, respectively. Due to such super-saturation of Mo, Mo diffuses to interdendritic Mo-rich eutectic in first 5 min of solution treatment, and hence the eutectic sharply propagates, opposite to homogenization of Mo. The excess propagated eutectic causes the occurrence of sub-solidus melting. The proposed Mo-homogenization treatment can completely eliminate such sub-solidus melting.

Original language	English
Pages (from-to)	431-435
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	662
DOIs	https://doi.org/10.1016/j.jallcom.2015.12.053
State	Published - 25 Mar 2016

Keywords

Diffusion
High-temperature alloys
Metallography
Transmission electron microscopy

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10.1016/j.jallcom.2015.12.053

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title = "Interdendritic Mo homogenization and sub-solidus melting during solution treatment in the Mo-strengthening single crystal superalloys",

abstract = "The interdendritic Mo homogenization and relevant sub-solidus melting are investigated in detail during solution treatment for Mo-strengthening single crystal superalloys. During solidification, NiMo-γ eutectics and Ni2Mo phases precipitate from the residual liquid and the Mo super-saturated interdendritic γ channel, respectively. Due to such super-saturation of Mo, Mo diffuses to interdendritic Mo-rich eutectic in first 5 min of solution treatment, and hence the eutectic sharply propagates, opposite to homogenization of Mo. The excess propagated eutectic causes the occurrence of sub-solidus melting. The proposed Mo-homogenization treatment can completely eliminate such sub-solidus melting.",

keywords = "Diffusion, High-temperature alloys, Metallography, Transmission electron microscopy",

author = "Yi Ru and Shusuo Li and Yanling Pei and Jian Zhou and Shengkai Gong and Huibin Xu",

year = "2016",

month = mar,

day = "25",

doi = "10.1016/j.jallcom.2015.12.053",

language = "英语",

volume = "662",

pages = "431--435",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Interdendritic Mo homogenization and sub-solidus melting during solution treatment in the Mo-strengthening single crystal superalloys

AU - Ru, Yi

AU - Li, Shusuo

AU - Pei, Yanling

AU - Zhou, Jian

AU - Gong, Shengkai

AU - Xu, Huibin

PY - 2016/3/25

Y1 - 2016/3/25

N2 - The interdendritic Mo homogenization and relevant sub-solidus melting are investigated in detail during solution treatment for Mo-strengthening single crystal superalloys. During solidification, NiMo-γ eutectics and Ni2Mo phases precipitate from the residual liquid and the Mo super-saturated interdendritic γ channel, respectively. Due to such super-saturation of Mo, Mo diffuses to interdendritic Mo-rich eutectic in first 5 min of solution treatment, and hence the eutectic sharply propagates, opposite to homogenization of Mo. The excess propagated eutectic causes the occurrence of sub-solidus melting. The proposed Mo-homogenization treatment can completely eliminate such sub-solidus melting.

AB - The interdendritic Mo homogenization and relevant sub-solidus melting are investigated in detail during solution treatment for Mo-strengthening single crystal superalloys. During solidification, NiMo-γ eutectics and Ni2Mo phases precipitate from the residual liquid and the Mo super-saturated interdendritic γ channel, respectively. Due to such super-saturation of Mo, Mo diffuses to interdendritic Mo-rich eutectic in first 5 min of solution treatment, and hence the eutectic sharply propagates, opposite to homogenization of Mo. The excess propagated eutectic causes the occurrence of sub-solidus melting. The proposed Mo-homogenization treatment can completely eliminate such sub-solidus melting.

KW - Diffusion

KW - High-temperature alloys

KW - Metallography

KW - Transmission electron microscopy

UR - https://www.scopus.com/pages/publications/84951325472

U2 - 10.1016/j.jallcom.2015.12.053

DO - 10.1016/j.jallcom.2015.12.053

M3 - 文章

AN - SCOPUS:84951325472

SN - 0925-8388

VL - 662

SP - 431

EP - 435

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Interdendritic Mo homogenization and sub-solidus melting during solution treatment in the Mo-strengthening single crystal superalloys

Abstract

Keywords

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