Microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloys with and without Gd

Rengen Ding; Ian Jones; Yu-Lung Chiu; R Chen

doi:10.1016/j.intermet.2011.08.008

Microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloys with and without Gd

Rengen Ding, Ian Jones, Yu-Lung Chiu, R Chen

Metallurgy and Materials

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

5 Citations (Scopus)

Abstract

The microstructure and mechanical properties of directionally solidified Ti-46Al-0.5W-0.5Si with and without Gd have been investigated. Ti-46Al-0.5W-0.5Si consists of a nearly fully lamellar (alpha(2)/gamma) structure with gamma/Ti5Si3 eutectic in the interdendritic regions, small Ti5Si3 particles at the alpha(2)/gamma interfaces and some W-rich B2 phase in the dendrites. The addition of Gd brings about the formation of Gd2TiO5 and helps grain refine, thus improving the strength of the alloy. However, the texture of the ingots leads to a strong dependence of the strength on the loading axis. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	123-134
Number of pages	12
Journal	Intermetallics
Volume	20
Issue number	1
Early online date	1 Oct 2011
DOIs	https://doi.org/10.1016/j.intermet.2011.08.008
Publication status	Published - 1 Jan 2012

Keywords

Mechanical properties at ambient temperature
Titanium aluminides
Microstructure
Electron microscopy

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10.1016/j.intermet.2011.08.008

Structural Metallic Systems For Advanced Gas Turbine Applications
Bowen, P., Chiu, Y. & Reed, R.
Engineering & Physical Science Research Council
1/10/09 → 30/09/14
Project: Research Councils
Effective Structural Unit Size in Polycrystals: Formation, Quantification and micromechanical Behaviour
Jones, I.
Engineering & Physical Science Research Council
1/02/08 → 31/01/11
Project: Research Councils

Cite this

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title = "Microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloys with and without Gd",

abstract = "The microstructure and mechanical properties of directionally solidified Ti-46Al-0.5W-0.5Si with and without Gd have been investigated. Ti-46Al-0.5W-0.5Si consists of a nearly fully lamellar (alpha(2)/gamma) structure with gamma/Ti5Si3 eutectic in the interdendritic regions, small Ti5Si3 particles at the alpha(2)/gamma interfaces and some W-rich B2 phase in the dendrites. The addition of Gd brings about the formation of Gd2TiO5 and helps grain refine, thus improving the strength of the alloy. However, the texture of the ingots leads to a strong dependence of the strength on the loading axis. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.",

keywords = "Mechanical properties at ambient temperature, Titanium aluminides, Microstructure, Electron microscopy",

author = "Rengen Ding and Ian Jones and Yu-Lung Chiu and R Chen",

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T1 - Microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloys with and without Gd

AU - Ding, Rengen

AU - Jones, Ian

AU - Chiu, Yu-Lung

AU - Chen, R

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The microstructure and mechanical properties of directionally solidified Ti-46Al-0.5W-0.5Si with and without Gd have been investigated. Ti-46Al-0.5W-0.5Si consists of a nearly fully lamellar (alpha(2)/gamma) structure with gamma/Ti5Si3 eutectic in the interdendritic regions, small Ti5Si3 particles at the alpha(2)/gamma interfaces and some W-rich B2 phase in the dendrites. The addition of Gd brings about the formation of Gd2TiO5 and helps grain refine, thus improving the strength of the alloy. However, the texture of the ingots leads to a strong dependence of the strength on the loading axis. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

AB - The microstructure and mechanical properties of directionally solidified Ti-46Al-0.5W-0.5Si with and without Gd have been investigated. Ti-46Al-0.5W-0.5Si consists of a nearly fully lamellar (alpha(2)/gamma) structure with gamma/Ti5Si3 eutectic in the interdendritic regions, small Ti5Si3 particles at the alpha(2)/gamma interfaces and some W-rich B2 phase in the dendrites. The addition of Gd brings about the formation of Gd2TiO5 and helps grain refine, thus improving the strength of the alloy. However, the texture of the ingots leads to a strong dependence of the strength on the loading axis. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

KW - Mechanical properties at ambient temperature

KW - Titanium aluminides

KW - Microstructure

KW - Electron microscopy

U2 - 10.1016/j.intermet.2011.08.008

DO - 10.1016/j.intermet.2011.08.008

M3 - Article

VL - 20

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EP - 134

JO - Intermetallics

JF - Intermetallics

IS - 1

ER -

Microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloys with and without Gd

Abstract

Keywords

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Projects

Structural Metallic Systems For Advanced Gas Turbine Applications

Effective Structural Unit Size in Polycrystals: Formation, Quantification and micromechanical Behaviour

Cite this