Microstructure design and its effect on mechanical properties in gamma titanium aluminides

Xuqi Liu; Qia Lin; Wenjing Zhang; Constance Van Horne; Limei Cha

doi:10.3390/met11101644

Microstructure design and its effect on mechanical properties in gamma titanium aluminides

Xuqi Liu, Qia Lin, Wenjing Zhang, Constance Van Horne, Limei Cha^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Review article › peer-review

6 Scopus citations

Abstract

Intermetallic gamma titanium aluminides display attractive engineering properties at high temperatures of up to 750 °C. To date, they have been used in low-pressure turbine blades and turbocharger rotors in advanced aircraft and automotive engines. This review summarizes the fundamental information of the Ti–Al system. After providing the development of γ TiAl alloys, typical phases, microstructures and their characteristics in TiAl alloys, the paper focuses on the effects of alloying elements on the phase boundary shifting, stabilizing effects and strengthening mechanism. The relationships between chemical additions, microstructure evolution and mechanical properties of the alloy are discussed. In parallel, the processing technologies and the common heat treatment methods are described in detail, both of which are applied to optimize the mechanical properties via adjusting microstructures. On this basis, the effects from chemical composition, processing technologies and heat treatments on microstructure, which controls the mechanical proper-ties, can be obtained. It has a certain guiding significance for tailoring the microstructures to gain desired mechanical properties.

Original language	English
Article number	1644
Journal	Metals
Volume	11
Issue number	10
DOIs	https://doi.org/10.3390/met11101644
State	Published - Oct 2021

Keywords

Gamma titanium aluminides
Intermetallic
Mechanical properties
Microstructure evolution
Processing techniques

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10.3390/met11101644

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title = "Microstructure design and its effect on mechanical properties in gamma titanium aluminides",

abstract = "Intermetallic gamma titanium aluminides display attractive engineering properties at high temperatures of up to 750 °C. To date, they have been used in low-pressure turbine blades and turbocharger rotors in advanced aircraft and automotive engines. This review summarizes the fundamental information of the Ti–Al system. After providing the development of γ TiAl alloys, typical phases, microstructures and their characteristics in TiAl alloys, the paper focuses on the effects of alloying elements on the phase boundary shifting, stabilizing effects and strengthening mechanism. The relationships between chemical additions, microstructure evolution and mechanical properties of the alloy are discussed. In parallel, the processing technologies and the common heat treatment methods are described in detail, both of which are applied to optimize the mechanical properties via adjusting microstructures. On this basis, the effects from chemical composition, processing technologies and heat treatments on microstructure, which controls the mechanical proper-ties, can be obtained. It has a certain guiding significance for tailoring the microstructures to gain desired mechanical properties.",

keywords = "Gamma titanium aluminides, Intermetallic, Mechanical properties, Microstructure evolution, Processing techniques",

author = "Xuqi Liu and Qia Lin and Wenjing Zhang and {Van Horne}, Constance and Limei Cha",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = oct,

doi = "10.3390/met11101644",

language = "英语",

volume = "11",

journal = "Metals",

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T1 - Microstructure design and its effect on mechanical properties in gamma titanium aluminides

AU - Liu, Xuqi

AU - Lin, Qia

AU - Zhang, Wenjing

AU - Van Horne, Constance

AU - Cha, Limei

PY - 2021/10

Y1 - 2021/10

N2 - Intermetallic gamma titanium aluminides display attractive engineering properties at high temperatures of up to 750 °C. To date, they have been used in low-pressure turbine blades and turbocharger rotors in advanced aircraft and automotive engines. This review summarizes the fundamental information of the Ti–Al system. After providing the development of γ TiAl alloys, typical phases, microstructures and their characteristics in TiAl alloys, the paper focuses on the effects of alloying elements on the phase boundary shifting, stabilizing effects and strengthening mechanism. The relationships between chemical additions, microstructure evolution and mechanical properties of the alloy are discussed. In parallel, the processing technologies and the common heat treatment methods are described in detail, both of which are applied to optimize the mechanical properties via adjusting microstructures. On this basis, the effects from chemical composition, processing technologies and heat treatments on microstructure, which controls the mechanical proper-ties, can be obtained. It has a certain guiding significance for tailoring the microstructures to gain desired mechanical properties.

AB - Intermetallic gamma titanium aluminides display attractive engineering properties at high temperatures of up to 750 °C. To date, they have been used in low-pressure turbine blades and turbocharger rotors in advanced aircraft and automotive engines. This review summarizes the fundamental information of the Ti–Al system. After providing the development of γ TiAl alloys, typical phases, microstructures and their characteristics in TiAl alloys, the paper focuses on the effects of alloying elements on the phase boundary shifting, stabilizing effects and strengthening mechanism. The relationships between chemical additions, microstructure evolution and mechanical properties of the alloy are discussed. In parallel, the processing technologies and the common heat treatment methods are described in detail, both of which are applied to optimize the mechanical properties via adjusting microstructures. On this basis, the effects from chemical composition, processing technologies and heat treatments on microstructure, which controls the mechanical proper-ties, can be obtained. It has a certain guiding significance for tailoring the microstructures to gain desired mechanical properties.

KW - Gamma titanium aluminides

KW - Intermetallic

KW - Mechanical properties

KW - Microstructure evolution

KW - Processing techniques

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U2 - 10.3390/met11101644

DO - 10.3390/met11101644

M3 - 文献综述

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SN - 2075-4701

VL - 11

JO - Metals

JF - Metals

IS - 10

M1 - 1644

ER -

Microstructure design and its effect on mechanical properties in gamma titanium aluminides

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Keywords

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