Effect of heat treatment on S-segregation of microstructure for as-cast high Nb containing TiAl alloy

Zheng Fang Xu; Xiang Jun Xu; Jun Pin Lin; Yong Zhang; Yan Li Wang; Zhi Lin; Guo Liang Chen

Effect of heat treatment on S-segregation of microstructure for as-cast high Nb containing TiAl alloy

Zheng Fang Xu^*
, Xiang Jun Xu
, Jun Pin Lin
, Yong Zhang
, Yan Li Wang
, Zhi Lin
, Guo Liang Chen

^*Corresponding author for this work

University of Science and Technology Beijing

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

7 Scopus citations

Abstract

The effect of heat treatment on the S-segregation of the microstructure for as-cast high containing TiAl alloy was studied. The results show that S-segregation can be eliminated by the heat treatment at the temperature above T_α(1350-1400°C). A large number of B phase appears after short time holding, but B phase will completely dissolve after long time holding and then transform to α phase that becomes lamellar microstructures after cooling to room temperature. The S-segregation can not be eliminated below the temperature of T_α(1250-1330°C) owing to the existence of γ phase. For alloy samples after the heat treatment of 1350°C/24 h+900°C/30min/AC and 1400°C/12 h+900°C/30 min/AC, the S-segregation can be efficiently eliminated and gain lamellar microstructures. The average lamellar colony size is 210 μm and 120 μm respectively.

Original language	English
Pages (from-to)	28-32
Number of pages	5
Journal	Journal of Aeronautical Materials
Volume	27
Issue number	3
State	Published - Jun 2007
Externally published	Yes

Keywords

Heat treatment
High Nb containing TiAl alloy
Microstructure
S-segregation

Cite this

@article{88f7aca6ffc942d09296bc4dca2f25e7,

title = "Effect of heat treatment on S-segregation of microstructure for as-cast high Nb containing TiAl alloy",

abstract = "The effect of heat treatment on the S-segregation of the microstructure for as-cast high containing TiAl alloy was studied. The results show that S-segregation can be eliminated by the heat treatment at the temperature above Tα(1350-1400°C). A large number of B phase appears after short time holding, but B phase will completely dissolve after long time holding and then transform to α phase that becomes lamellar microstructures after cooling to room temperature. The S-segregation can not be eliminated below the temperature of Tα(1250-1330°C) owing to the existence of γ phase. For alloy samples after the heat treatment of 1350°C/24 h+900°C/30min/AC and 1400°C/12 h+900°C/30 min/AC, the S-segregation can be efficiently eliminated and gain lamellar microstructures. The average lamellar colony size is 210 μm and 120 μm respectively.",

keywords = "Heat treatment, High Nb containing TiAl alloy, Microstructure, S-segregation",

author = "Xu, \{Zheng Fang\} and Xu, \{Xiang Jun\} and Lin, \{Jun Pin\} and Yong Zhang and Wang, \{Yan Li\} and Zhi Lin and Chen, \{Guo Liang\}",

year = "2007",

month = jun,

language = "英语",

volume = "27",

pages = "28--32",

journal = "Journal of Aeronautical Materials",

issn = "1005-5053",

publisher = "Science Press ",

number = "3",

}

TY - JOUR

T1 - Effect of heat treatment on S-segregation of microstructure for as-cast high Nb containing TiAl alloy

AU - Xu, Zheng Fang

AU - Xu, Xiang Jun

AU - Lin, Jun Pin

AU - Zhang, Yong

AU - Wang, Yan Li

AU - Lin, Zhi

AU - Chen, Guo Liang

PY - 2007/6

Y1 - 2007/6

N2 - The effect of heat treatment on the S-segregation of the microstructure for as-cast high containing TiAl alloy was studied. The results show that S-segregation can be eliminated by the heat treatment at the temperature above Tα(1350-1400°C). A large number of B phase appears after short time holding, but B phase will completely dissolve after long time holding and then transform to α phase that becomes lamellar microstructures after cooling to room temperature. The S-segregation can not be eliminated below the temperature of Tα(1250-1330°C) owing to the existence of γ phase. For alloy samples after the heat treatment of 1350°C/24 h+900°C/30min/AC and 1400°C/12 h+900°C/30 min/AC, the S-segregation can be efficiently eliminated and gain lamellar microstructures. The average lamellar colony size is 210 μm and 120 μm respectively.

AB - The effect of heat treatment on the S-segregation of the microstructure for as-cast high containing TiAl alloy was studied. The results show that S-segregation can be eliminated by the heat treatment at the temperature above Tα(1350-1400°C). A large number of B phase appears after short time holding, but B phase will completely dissolve after long time holding and then transform to α phase that becomes lamellar microstructures after cooling to room temperature. The S-segregation can not be eliminated below the temperature of Tα(1250-1330°C) owing to the existence of γ phase. For alloy samples after the heat treatment of 1350°C/24 h+900°C/30min/AC and 1400°C/12 h+900°C/30 min/AC, the S-segregation can be efficiently eliminated and gain lamellar microstructures. The average lamellar colony size is 210 μm and 120 μm respectively.

KW - Heat treatment

KW - High Nb containing TiAl alloy

KW - Microstructure

KW - S-segregation

UR - https://www.scopus.com/pages/publications/34347246701

M3 - 文章

AN - SCOPUS:34347246701

SN - 1005-5053

VL - 27

SP - 28

EP - 32

JO - Journal of Aeronautical Materials

JF - Journal of Aeronautical Materials

IS - 3

ER -

Effect of heat treatment on S-segregation of microstructure for as-cast high Nb containing TiAl alloy

Abstract

Keywords

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