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, Hideyuki Murakami, Y. Yamabe-Mitarai

Research output: Contribution to journalArticle

10 Citations (Scopus)

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 languageEnglish
Pages (from-to)1015-1021
Number of pages7
JournalMaterials Chemistry and Physics
Volume136
Issue number2-3
DOIs
Publication statusPublished - 2012 Oct 15
Externally publishedYes

Fingerprint

tensile properties
Tensile properties
Oxides
microstructure
Microstructure
Grain refinement
Ductility
Precipitates
Solid solutions
Aging of materials
dispersion strengthening
Temperature
cast alloys
oxides
ductility
precipitates
solid solutions
grain size
room temperature

Keywords

  • Alloys
  • Heat treatment
  • Mechanical properties
  • Microstructure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Effects of Sc addition on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr alloy. / Xiao, W. L.; Wu, S. Q.; Ping, D. H.; Murakami, Hideyuki; Yamabe-Mitarai, Y.

In: Materials Chemistry and Physics, Vol. 136, No. 2-3, 15.10.2012, p. 1015-1021.

Research output: Contribution to journalArticle

Xiao, W. L. ; Wu, S. Q. ; Ping, D. H. ; Murakami, Hideyuki ; Yamabe-Mitarai, Y. / Effects of Sc addition on the microstructure and tensile properties of Ti-6.6Al-5.5Sn-1.8Zr alloy. In: Materials Chemistry and Physics. 2012 ; Vol. 136, No. 2-3. pp. 1015-1021.
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