Effects of Sc addition on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr alloy

W. L. Xiao; S. Q. Wu; D. H. Ping; H. Murakami; Y. Yamabe-Mitarai

doi:10.1016/j.matchemphys.2012.08.041

Effects of Sc addition on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr alloy

W. L. Xiao^*
, S. Q. Wu
, D. H. Ping
, H. Murakami
, Y. Yamabe-Mitarai

^*Corresponding author for this work

National Institute for Materials Science Tsukuba
CAS - Institute of Metal Research
University of Chinese Academy of Sciences

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

25 Scopus citations

Abstract

The effects of Sc additions on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr-based alloys have been investigated. The results indicated that Sc acts as α-stabilizer in the studied alloy system. The grain sizes of as-cast and forged alloys were refined significantly by Sc additions. With increasing Sc addition, a large number of Sc ₅Sn ₃ and oxides are formed. The formation of brittle α ₂-Ti ₃Al precipitates during long-term aging treatment is suppressed by high content of Sc addition. The Sc addition increases the solid solution strengthening; meanwhile, the formation of Sc ₅Sn ₃ and oxides plays a role in grain refinement and dispersion strengthening. Therefore, it has been found that both room temperature and high temperature strengths are gradually improved, whereas the ductility is decreased with increasing Sc addition.

Original language	English
Pages (from-to)	1015-1021
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	136
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2012.08.041
State	Published - 15 Oct 2012
Externally published	Yes

Keywords

Alloys
Heat treatment
Mechanical properties
Microstructure

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10.1016/j.matchemphys.2012.08.041

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title = "Effects of Sc addition on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr alloy",

abstract = "The effects of Sc additions on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr-based alloys have been investigated. The results indicated that Sc acts as α-stabilizer in the studied alloy system. The grain sizes of as-cast and forged alloys were refined significantly by Sc additions. With increasing Sc addition, a large number of Sc 5Sn 3 and oxides are formed. The formation of brittle α 2-Ti 3Al precipitates during long-term aging treatment is suppressed by high content of Sc addition. The Sc addition increases the solid solution strengthening; meanwhile, the formation of Sc 5Sn 3 and oxides plays a role in grain refinement and dispersion strengthening. Therefore, it has been found that both room temperature and high temperature strengths are gradually improved, whereas the ductility is decreased with increasing Sc addition.",

keywords = "Alloys, Heat treatment, Mechanical properties, Microstructure",

author = "Xiao, \{W. L.\} and Wu, \{S. Q.\} and Ping, \{D. H.\} and H. Murakami and Y. Yamabe-Mitarai",

year = "2012",

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doi = "10.1016/j.matchemphys.2012.08.041",

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volume = "136",

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TY - JOUR

T1 - Effects of Sc addition on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr alloy

AU - Xiao, W. L.

AU - Wu, S. Q.

AU - Ping, D. H.

AU - Murakami, H.

AU - Yamabe-Mitarai, Y.

PY - 2012/10/15

Y1 - 2012/10/15

N2 - The effects of Sc additions on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr-based alloys have been investigated. The results indicated that Sc acts as α-stabilizer in the studied alloy system. The grain sizes of as-cast and forged alloys were refined significantly by Sc additions. With increasing Sc addition, a large number of Sc 5Sn 3 and oxides are formed. The formation of brittle α 2-Ti 3Al precipitates during long-term aging treatment is suppressed by high content of Sc addition. The Sc addition increases the solid solution strengthening; meanwhile, the formation of Sc 5Sn 3 and oxides plays a role in grain refinement and dispersion strengthening. Therefore, it has been found that both room temperature and high temperature strengths are gradually improved, whereas the ductility is decreased with increasing Sc addition.

AB - The effects of Sc additions on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr-based alloys have been investigated. The results indicated that Sc acts as α-stabilizer in the studied alloy system. The grain sizes of as-cast and forged alloys were refined significantly by Sc additions. With increasing Sc addition, a large number of Sc 5Sn 3 and oxides are formed. The formation of brittle α 2-Ti 3Al precipitates during long-term aging treatment is suppressed by high content of Sc addition. The Sc addition increases the solid solution strengthening; meanwhile, the formation of Sc 5Sn 3 and oxides plays a role in grain refinement and dispersion strengthening. Therefore, it has been found that both room temperature and high temperature strengths are gradually improved, whereas the ductility is decreased with increasing Sc addition.

KW - Alloys

KW - Heat treatment

KW - Mechanical properties

KW - Microstructure

UR - https://www.scopus.com/pages/publications/84867396406

U2 - 10.1016/j.matchemphys.2012.08.041

DO - 10.1016/j.matchemphys.2012.08.041

M3 - 文章

AN - SCOPUS:84867396406

SN - 0254-0584

VL - 136

SP - 1015

EP - 1021

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -

Effects of Sc addition on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr alloy

Abstract

Keywords

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