Comparison of titanium silicide and carbide reinforced in situ synthesized TiAl composites and their mechanical properties

K. P. Rao; A. Vyas

doi:10.1016/j.intermet.2011.04.001

Comparison of titanium silicide and carbide reinforced in situ synthesized TiAl composites and their mechanical properties

K. P. Rao, A. Vyas

Division of Science, Engineering and Health Studies (SEHS)

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

9 Citations (Scopus)

Abstract

This study explored a synthesizing route involving in situ development of reinforcements of titanium silicides in a series of TiAl-based matrices. The main features of this processing route are: (1) Incorporating a small quantity of mechanically alloyed Ti-Al-Si and Ti-Al-Si-C powders, referred to as precursors, into Ti-Al-X (X stands for Cr, Mn, Nb, or their combination) powder mixtures that act as matrices; and (2) Hot isostatic pressing (HIPing) of the cold compacted mixture at a temperature of 1100 °C for 4 h. A series of composites based on different Ti-Al-X matrix were synthesized. The structural evolution in these composites was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical properties and compression tests at room and elevated temperatures (600 °C and 800 °C) have been investigated. In addition, the influence of alloying elements in the matrix has been evaluated from their stress-strain responses.

Original language	English
Pages (from-to)	1236-1242
Number of pages	7
Journal	Intermetallics
Volume	19
Issue number	8
DOIs	https://doi.org/10.1016/j.intermet.2011.04.001
Publication status	Published - Aug 2011

Keywords

A. Intermetallics
B. Mechanical properties at high temperatures
C. Mechanical alloying and milling
F. X-ray diffraction (XRD)

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10.1016/j.intermet.2011.04.001

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title = "Comparison of titanium silicide and carbide reinforced in situ synthesized TiAl composites and their mechanical properties",

abstract = "This study explored a synthesizing route involving in situ development of reinforcements of titanium silicides in a series of TiAl-based matrices. The main features of this processing route are: (1) Incorporating a small quantity of mechanically alloyed Ti-Al-Si and Ti-Al-Si-C powders, referred to as precursors, into Ti-Al-X (X stands for Cr, Mn, Nb, or their combination) powder mixtures that act as matrices; and (2) Hot isostatic pressing (HIPing) of the cold compacted mixture at a temperature of 1100 °C for 4 h. A series of composites based on different Ti-Al-X matrix were synthesized. The structural evolution in these composites was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical properties and compression tests at room and elevated temperatures (600 °C and 800 °C) have been investigated. In addition, the influence of alloying elements in the matrix has been evaluated from their stress-strain responses.",

keywords = "A. Intermetallics, B. Mechanical properties at high temperatures, C. Mechanical alloying and milling, F. X-ray diffraction (XRD)",

author = "Rao, {K. P.} and A. Vyas",

note = "Funding Information: This work was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. 114407 ). The authors would like to thank the reviewer for the comments and suggestions that helped in the revision of this paper.",

year = "2011",

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doi = "10.1016/j.intermet.2011.04.001",

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AU - Vyas, A.

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PY - 2011/8

Y1 - 2011/8

N2 - This study explored a synthesizing route involving in situ development of reinforcements of titanium silicides in a series of TiAl-based matrices. The main features of this processing route are: (1) Incorporating a small quantity of mechanically alloyed Ti-Al-Si and Ti-Al-Si-C powders, referred to as precursors, into Ti-Al-X (X stands for Cr, Mn, Nb, or their combination) powder mixtures that act as matrices; and (2) Hot isostatic pressing (HIPing) of the cold compacted mixture at a temperature of 1100 °C for 4 h. A series of composites based on different Ti-Al-X matrix were synthesized. The structural evolution in these composites was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical properties and compression tests at room and elevated temperatures (600 °C and 800 °C) have been investigated. In addition, the influence of alloying elements in the matrix has been evaluated from their stress-strain responses.

AB - This study explored a synthesizing route involving in situ development of reinforcements of titanium silicides in a series of TiAl-based matrices. The main features of this processing route are: (1) Incorporating a small quantity of mechanically alloyed Ti-Al-Si and Ti-Al-Si-C powders, referred to as precursors, into Ti-Al-X (X stands for Cr, Mn, Nb, or their combination) powder mixtures that act as matrices; and (2) Hot isostatic pressing (HIPing) of the cold compacted mixture at a temperature of 1100 °C for 4 h. A series of composites based on different Ti-Al-X matrix were synthesized. The structural evolution in these composites was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical properties and compression tests at room and elevated temperatures (600 °C and 800 °C) have been investigated. In addition, the influence of alloying elements in the matrix has been evaluated from their stress-strain responses.

KW - A. Intermetallics

KW - B. Mechanical properties at high temperatures

KW - C. Mechanical alloying and milling

KW - F. X-ray diffraction (XRD)

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Comparison of titanium silicide and carbide reinforced in situ synthesized TiAl composites and their mechanical properties

Abstract

Keywords

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