Microstructural evolution resulting from different deformation mechanisms of a high-Nb-containing TiAl alloy with harmonic structure during elevated-temperature deformation

Yudong Chu; Jinshan Li; Lei Zhu; Yan Liu; Bin Tang; Hongchao Kou

doi:10.1016/j.matlet.2019.01.099

Microstructural evolution resulting from different deformation mechanisms of a high-Nb-containing TiAl alloy with harmonic structure during elevated-temperature deformation

Yudong Chu, Jinshan Li, Lei Zhu, Yan Liu, Bin Tang, Hongchao Kou

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

3 Scopus citations

Abstract

A Ti-42.5Al-8Nb-0.2W-0.2B-0.1Y (at%) alloy with a harmonic structure was deformed via compression (temperature: 950 °C–1050 °C, strain rate: 10 ⁻² s ⁻¹ –10 ⁻⁴ s ⁻¹ ) and the resulting microstructure was characterized. The results revealed that at certain temperatures and strain rates the alloy undergoes compression deformation via intragranular deformation. However, with increasing temperatures and decreasing strain rates, this mechanism changed to grain boundary sliding (GBS) of β/B2 grains and γ grains in the enlarged shell area and the accommodated intragranular deformation of γ grains in the core area.

Original language	English
Pages (from-to)	35-38
Number of pages	4
Journal	Materials Letters
Volume	242
DOIs	https://doi.org/10.1016/j.matlet.2019.01.099
State	Published - 1 May 2019

Keywords

Harmonic structure
Isothermal compression
Microstructure
Recrystallization
Titanium aluminides

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10.1016/j.matlet.2019.01.099

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title = "Microstructural evolution resulting from different deformation mechanisms of a high-Nb-containing TiAl alloy with harmonic structure during elevated-temperature deformation",

abstract = " A Ti-42.5Al-8Nb-0.2W-0.2B-0.1Y (at%) alloy with a harmonic structure was deformed via compression (temperature: 950 °C–1050 °C, strain rate: 10 −2 s −1 –10 −4 s −1 ) and the resulting microstructure was characterized. The results revealed that at certain temperatures and strain rates the alloy undergoes compression deformation via intragranular deformation. However, with increasing temperatures and decreasing strain rates, this mechanism changed to grain boundary sliding (GBS) of β/B2 grains and γ grains in the enlarged shell area and the accommodated intragranular deformation of γ grains in the core area.",

keywords = "Harmonic structure, Isothermal compression, Microstructure, Recrystallization, Titanium aluminides",

author = "Yudong Chu and Jinshan Li and Lei Zhu and Yan Liu and Bin Tang and Hongchao Kou",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

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doi = "10.1016/j.matlet.2019.01.099",

language = "英语",

volume = "242",

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journal = "Materials Letters",

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TY - JOUR

T1 - Microstructural evolution resulting from different deformation mechanisms of a high-Nb-containing TiAl alloy with harmonic structure during elevated-temperature deformation

AU - Chu, Yudong

AU - Li, Jinshan

AU - Zhu, Lei

AU - Liu, Yan

AU - Tang, Bin

AU - Kou, Hongchao

PY - 2019/5/1

Y1 - 2019/5/1

N2 - A Ti-42.5Al-8Nb-0.2W-0.2B-0.1Y (at%) alloy with a harmonic structure was deformed via compression (temperature: 950 °C–1050 °C, strain rate: 10 −2 s −1 –10 −4 s −1 ) and the resulting microstructure was characterized. The results revealed that at certain temperatures and strain rates the alloy undergoes compression deformation via intragranular deformation. However, with increasing temperatures and decreasing strain rates, this mechanism changed to grain boundary sliding (GBS) of β/B2 grains and γ grains in the enlarged shell area and the accommodated intragranular deformation of γ grains in the core area.

AB - A Ti-42.5Al-8Nb-0.2W-0.2B-0.1Y (at%) alloy with a harmonic structure was deformed via compression (temperature: 950 °C–1050 °C, strain rate: 10 −2 s −1 –10 −4 s −1 ) and the resulting microstructure was characterized. The results revealed that at certain temperatures and strain rates the alloy undergoes compression deformation via intragranular deformation. However, with increasing temperatures and decreasing strain rates, this mechanism changed to grain boundary sliding (GBS) of β/B2 grains and γ grains in the enlarged shell area and the accommodated intragranular deformation of γ grains in the core area.

KW - Harmonic structure

KW - Isothermal compression

KW - Microstructure

KW - Recrystallization

KW - Titanium aluminides

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U2 - 10.1016/j.matlet.2019.01.099

DO - 10.1016/j.matlet.2019.01.099

M3 - 文章

AN - SCOPUS:85060844395

SN - 0167-577X

VL - 242

SP - 35

EP - 38

JO - Materials Letters

JF - Materials Letters

ER -

Microstructural evolution resulting from different deformation mechanisms of a high-Nb-containing TiAl alloy with harmonic structure during elevated-temperature deformation

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Keywords

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