On the microsegregation of Ti-45Al-(8-9)Nb-(W, B, Y) alloy

X. J. Xu; J. P. Lin; Z. K. Teng; Y. L. Wang; G. L. Chen

doi:10.1016/j.matlet.2006.04.115

On the microsegregation of Ti-45Al-(8-9)Nb-(W, B, Y) alloy

X. J. Xu^*
, J. P. Lin
, Z. K. Teng
, Y. L. Wang
, G. L. Chen

^*Corresponding author for this work

University of Science and Technology Beijing

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

76 Scopus citations

Abstract

The morphology, distribution and origin of microsegregation of an as-cast high Nb containing TiAl alloy and the effect of the microsegregation on as-forged and heat-treated microstructures had been investigated. The results showed that there were three kinds of microsegregations, designated as L-segregation, β-segregation and α-segregation, existing on boundaries of primary β grains, on triple junctions of lamellar colonies, within lamellar colonies, respectively. The segregations were formed during solidification and phase transformation of the alloy due to high cooling rate and low atom diffusion rate. After forging in (α + γ) region β-segregation and α-segregation could be eliminated after, but L-segregation could not be eliminated. L-segregation was detrimental to heat treatment of the as-forged material.

Original language	English
Pages (from-to)	369-373
Number of pages	5
Journal	Materials Letters
Volume	61
Issue number	2
DOIs	https://doi.org/10.1016/j.matlet.2006.04.115
State	Published - Jan 2007
Externally published	Yes

Keywords

Intermetallic alloys and compounds
Microsegregation
Microstructure

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10.1016/j.matlet.2006.04.115

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title = "On the microsegregation of Ti-45Al-(8-9)Nb-(W, B, Y) alloy",

abstract = "The morphology, distribution and origin of microsegregation of an as-cast high Nb containing TiAl alloy and the effect of the microsegregation on as-forged and heat-treated microstructures had been investigated. The results showed that there were three kinds of microsegregations, designated as L-segregation, β-segregation and α-segregation, existing on boundaries of primary β grains, on triple junctions of lamellar colonies, within lamellar colonies, respectively. The segregations were formed during solidification and phase transformation of the alloy due to high cooling rate and low atom diffusion rate. After forging in (α + γ) region β-segregation and α-segregation could be eliminated after, but L-segregation could not be eliminated. L-segregation was detrimental to heat treatment of the as-forged material.",

keywords = "Intermetallic alloys and compounds, Microsegregation, Microstructure",

author = "Xu, \{X. J.\} and Lin, \{J. P.\} and Teng, \{Z. K.\} and Wang, \{Y. L.\} and Chen, \{G. L.\}",

year = "2007",

month = jan,

doi = "10.1016/j.matlet.2006.04.115",

language = "英语",

volume = "61",

pages = "369--373",

journal = "Materials Letters",

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T1 - On the microsegregation of Ti-45Al-(8-9)Nb-(W, B, Y) alloy

AU - Xu, X. J.

AU - Lin, J. P.

AU - Teng, Z. K.

AU - Wang, Y. L.

AU - Chen, G. L.

PY - 2007/1

Y1 - 2007/1

N2 - The morphology, distribution and origin of microsegregation of an as-cast high Nb containing TiAl alloy and the effect of the microsegregation on as-forged and heat-treated microstructures had been investigated. The results showed that there were three kinds of microsegregations, designated as L-segregation, β-segregation and α-segregation, existing on boundaries of primary β grains, on triple junctions of lamellar colonies, within lamellar colonies, respectively. The segregations were formed during solidification and phase transformation of the alloy due to high cooling rate and low atom diffusion rate. After forging in (α + γ) region β-segregation and α-segregation could be eliminated after, but L-segregation could not be eliminated. L-segregation was detrimental to heat treatment of the as-forged material.

AB - The morphology, distribution and origin of microsegregation of an as-cast high Nb containing TiAl alloy and the effect of the microsegregation on as-forged and heat-treated microstructures had been investigated. The results showed that there were three kinds of microsegregations, designated as L-segregation, β-segregation and α-segregation, existing on boundaries of primary β grains, on triple junctions of lamellar colonies, within lamellar colonies, respectively. The segregations were formed during solidification and phase transformation of the alloy due to high cooling rate and low atom diffusion rate. After forging in (α + γ) region β-segregation and α-segregation could be eliminated after, but L-segregation could not be eliminated. L-segregation was detrimental to heat treatment of the as-forged material.

KW - Intermetallic alloys and compounds

KW - Microsegregation

KW - Microstructure

UR - https://www.scopus.com/pages/publications/34347264326

U2 - 10.1016/j.matlet.2006.04.115

DO - 10.1016/j.matlet.2006.04.115

M3 - 文章

AN - SCOPUS:34347264326

SN - 0167-577X

VL - 61

SP - 369

EP - 373

JO - Materials Letters

JF - Materials Letters

IS - 2

ER -

On the microsegregation of Ti-45Al-(8-9)Nb-(W, B, Y) alloy

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Keywords

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