Thermomechanical characterization of β-stabilized Ti-45Al-7Nb-0.4W-0. 15B alloy

B. Liu; Y. Liu; Y. P. Li; W. Zhang; A. Chiba

doi:10.1016/j.intermet.2011.03.021

Thermomechanical characterization of β-stabilized Ti-45Al-7Nb-0.4W-0. 15B alloy

B. Liu, Y. Liu, Y. P. Li, W. Zhang, A. Chiba

New Industry Creation Hatchery Center (NICHe)

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

90 Citations (Scopus)

Abstract

The correlation between hot deformation parameters and the workability of β-stabilized Ti-45Al-7Nb-0.4W-0.15B (at. %) alloy was studied in the temperature range 1000-1200 °C and the strain rate range 0.001-1 s ^-1. Deformation mechanisms were characterized by detailed analyses of the deformation behavior and microstructural observations. The results indicate that the deformation and recrystallization occurred preferentially in the grain boundary β phases because its good high temperature deformability enhances grain boundary sliding and migration, and thus improves the workability. Decomposition of the β phase to α₂ and γ phases partly accommodates the stress concentration and is thus beneficial in hot deformation. Appropriate deformation processing parameters were suggested based on the processing map, and were successfully applied in the quasi-isothermal canned forging of industrial-scale billets.

Original language	English
Pages (from-to)	1184-1190
Number of pages	7
Journal	Intermetallics
Volume	19
Issue number	8
DOIs	https://doi.org/10.1016/j.intermet.2011.03.021
Publication status	Published - 2011 Aug

Keywords

A. Titanium aluminides, based on TiAl
B. Deformation map
C. Thermomechanical treatment
D. Microstructure

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10.1016/j.intermet.2011.03.021

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title = "Thermomechanical characterization of β-stabilized Ti-45Al-7Nb-0.4W-0. 15B alloy",

abstract = "The correlation between hot deformation parameters and the workability of β-stabilized Ti-45Al-7Nb-0.4W-0.15B (at. %) alloy was studied in the temperature range 1000-1200 °C and the strain rate range 0.001-1 s -1. Deformation mechanisms were characterized by detailed analyses of the deformation behavior and microstructural observations. The results indicate that the deformation and recrystallization occurred preferentially in the grain boundary β phases because its good high temperature deformability enhances grain boundary sliding and migration, and thus improves the workability. Decomposition of the β phase to α2 and γ phases partly accommodates the stress concentration and is thus beneficial in hot deformation. Appropriate deformation processing parameters were suggested based on the processing map, and were successfully applied in the quasi-isothermal canned forging of industrial-scale billets.",

keywords = "A. Titanium aluminides, based on TiAl, B. Deformation map, C. Thermomechanical treatment, D. Microstructure",

author = "B. Liu and Y. Liu and Li, {Y. P.} and W. Zhang and A. Chiba",

note = "Funding Information: This work was partly supported by a grant from the Major State Basic Research Development Program of China (No. 2011CB605500 ) and the National High Technology Research and Development Program of China (No. 2008AA03A233 ).",

year = "2011",

month = aug,

doi = "10.1016/j.intermet.2011.03.021",

language = "English",

volume = "19",

pages = "1184--1190",

journal = "Intermetallics",

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T1 - Thermomechanical characterization of β-stabilized Ti-45Al-7Nb-0.4W-0. 15B alloy

AU - Liu, B.

AU - Liu, Y.

AU - Li, Y. P.

AU - Zhang, W.

AU - Chiba, A.

N1 - Funding Information: This work was partly supported by a grant from the Major State Basic Research Development Program of China (No. 2011CB605500 ) and the National High Technology Research and Development Program of China (No. 2008AA03A233 ).

PY - 2011/8

Y1 - 2011/8

N2 - The correlation between hot deformation parameters and the workability of β-stabilized Ti-45Al-7Nb-0.4W-0.15B (at. %) alloy was studied in the temperature range 1000-1200 °C and the strain rate range 0.001-1 s -1. Deformation mechanisms were characterized by detailed analyses of the deformation behavior and microstructural observations. The results indicate that the deformation and recrystallization occurred preferentially in the grain boundary β phases because its good high temperature deformability enhances grain boundary sliding and migration, and thus improves the workability. Decomposition of the β phase to α2 and γ phases partly accommodates the stress concentration and is thus beneficial in hot deformation. Appropriate deformation processing parameters were suggested based on the processing map, and were successfully applied in the quasi-isothermal canned forging of industrial-scale billets.

AB - The correlation between hot deformation parameters and the workability of β-stabilized Ti-45Al-7Nb-0.4W-0.15B (at. %) alloy was studied in the temperature range 1000-1200 °C and the strain rate range 0.001-1 s -1. Deformation mechanisms were characterized by detailed analyses of the deformation behavior and microstructural observations. The results indicate that the deformation and recrystallization occurred preferentially in the grain boundary β phases because its good high temperature deformability enhances grain boundary sliding and migration, and thus improves the workability. Decomposition of the β phase to α2 and γ phases partly accommodates the stress concentration and is thus beneficial in hot deformation. Appropriate deformation processing parameters were suggested based on the processing map, and were successfully applied in the quasi-isothermal canned forging of industrial-scale billets.

KW - A. Titanium aluminides, based on TiAl

KW - B. Deformation map

KW - C. Thermomechanical treatment

KW - D. Microstructure

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SN - 0966-9795

VL - 19

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JO - Intermetallics

JF - Intermetallics

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ER -

Thermomechanical characterization of β-stabilized Ti-45Al-7Nb-0.4W-0. 15B alloy

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Keywords

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