Elimination of β phase segregation in as-cast high Nb containing TiAl alloy by heat treatment

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

Elimination of β phase segregation in as-cast high Nb containing TiAl alloy by heat treatment

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

10 Scopus citations

Abstract

The effect of the heat treatment on the elimination of the β phase segregation in as-cast high Nb containing TiAl alloy on large scale was studied. The results show that the β phase segregation can be eliminated by holding appropriate time in the two phase region of α + γ. The β-segregation at the grain boundaries and crsegregation in lamellar colonies can be efficiently eliminated after 1250°C/24h + 900°C/30min/AC for the alloy samples; but after 1280°C/6h + 900°C/30min/AC, the volume fraction of β phase is very small and completely eliminated after holding 12 h at the cost of the average lamellar colony size coarse from 75 μm to 123 μm.

Original language	English
Pages (from-to)	42-46
Number of pages	5
Journal	Journal of Materials Engineering
Issue number	9
State	Published - Sep 2007
Externally published	Yes

Keywords

A-segregation
Heat treatment
High Nb containing TiAl alloy
β-segregation

Cite this

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title = "Elimination of β phase segregation in as-cast high Nb containing TiAl alloy by heat treatment",

abstract = "The effect of the heat treatment on the elimination of the β phase segregation in as-cast high Nb containing TiAl alloy on large scale was studied. The results show that the β phase segregation can be eliminated by holding appropriate time in the two phase region of α + γ. The β-segregation at the grain boundaries and crsegregation in lamellar colonies can be efficiently eliminated after 1250°C/24h + 900°C/30min/AC for the alloy samples; but after 1280°C/6h + 900°C/30min/AC, the volume fraction of β phase is very small and completely eliminated after holding 12 h at the cost of the average lamellar colony size coarse from 75 μm to 123 μm.",

keywords = "A-segregation, Heat treatment, High Nb containing TiAl alloy, β-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 = sep,

language = "英语",

pages = "42--46",

journal = "Journal of Materials Engineering",

issn = "1001-4381",

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TY - JOUR

T1 - Elimination of β phase segregation in as-cast high Nb containing TiAl alloy by heat treatment

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 - 2007/9

Y1 - 2007/9

N2 - The effect of the heat treatment on the elimination of the β phase segregation in as-cast high Nb containing TiAl alloy on large scale was studied. The results show that the β phase segregation can be eliminated by holding appropriate time in the two phase region of α + γ. The β-segregation at the grain boundaries and crsegregation in lamellar colonies can be efficiently eliminated after 1250°C/24h + 900°C/30min/AC for the alloy samples; but after 1280°C/6h + 900°C/30min/AC, the volume fraction of β phase is very small and completely eliminated after holding 12 h at the cost of the average lamellar colony size coarse from 75 μm to 123 μm.

AB - The effect of the heat treatment on the elimination of the β phase segregation in as-cast high Nb containing TiAl alloy on large scale was studied. The results show that the β phase segregation can be eliminated by holding appropriate time in the two phase region of α + γ. The β-segregation at the grain boundaries and crsegregation in lamellar colonies can be efficiently eliminated after 1250°C/24h + 900°C/30min/AC for the alloy samples; but after 1280°C/6h + 900°C/30min/AC, the volume fraction of β phase is very small and completely eliminated after holding 12 h at the cost of the average lamellar colony size coarse from 75 μm to 123 μm.

KW - A-segregation

KW - Heat treatment

KW - High Nb containing TiAl alloy

KW - β-segregation

UR - https://www.scopus.com/pages/publications/35348988050

M3 - 文章

AN - SCOPUS:35348988050

SN - 1001-4381

SP - 42

EP - 46

JO - Journal of Materials Engineering

JF - Journal of Materials Engineering

IS - 9

ER -

Elimination of β phase segregation in as-cast high Nb containing TiAl alloy by heat treatment

Abstract

Keywords

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