Effects of rolling deformation on microstructure and hardness of Ti-45Al-9Nb-0.3Y alloy

Shuzhi Zhang; Changjiang Zhang; Zhaoping Hou; Fantao Kong; Yuyong Chen

doi:10.1016/S1002-0721(16)60014-5

Effects of rolling deformation on microstructure and hardness of Ti-45Al-9Nb-0.3Y alloy

Shuzhi Zhang^*
, Changjiang Zhang
, Zhaoping Hou
, Fantao Kong
, Yuyong Chen

^*Corresponding author for this work

School of Materials Science and Engineering

Taiyuan University of Technology
Harbin Institute of Technology

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

12 Scopus citations

Abstract

The microstructure evolution of as-rolled Ti-45Al-9Nb-0.3Y alloy as well as the nanohardness of β/B2 matrix was investigated by means of scanning electron microscopy (SEM) in backscattered electron mode (BSE) mode, transmission electron microscopy (TEM) and nanoindentation. This high Nb containing TiAl based alloy was rolled with 50%, 60%, 65% reduction, respectively. Omega phase precipitated in B2 phase with an orientation relationship of {110}_β//{11 0}_ω and <1 1>_β//<0001>_ω. Moreover, with the increase of deformation reduction, rod-like structure which was formed in γ grain transformed from (α₂+γ) lamellae structure into α₂ phase only. Additionally, nanoinentation experiment revealed that the precipitation hardening of ω phase increased the hardness of β/B2 phase.

Original language	English
Pages (from-to)	197-202
Number of pages	6
Journal	Journal of Rare Earths
Volume	34
Issue number	2
DOIs	https://doi.org/10.1016/S1002-0721(16)60014-5
State	Published - 1 Feb 2016

Keywords

TNB alloy
high Nb containing TiAl based alloy
hot rolling
nanohardness
omega phase
phase transformation
rare earths

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10.1016/S1002-0721(16)60014-5

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@article{59436474f45f4c31a147472061f80463,

title = "Effects of rolling deformation on microstructure and hardness of Ti-45Al-9Nb-0.3Y alloy",

abstract = "The microstructure evolution of as-rolled Ti-45Al-9Nb-0.3Y alloy as well as the nanohardness of β/B2 matrix was investigated by means of scanning electron microscopy (SEM) in backscattered electron mode (BSE) mode, transmission electron microscopy (TEM) and nanoindentation. This high Nb containing TiAl based alloy was rolled with 50\%, 60\%, 65\% reduction, respectively. Omega phase precipitated in B2 phase with an orientation relationship of \{110\}β//\{11 0\}ω and <1 1>β//<0001>ω. Moreover, with the increase of deformation reduction, rod-like structure which was formed in γ grain transformed from (α2+γ) lamellae structure into α2 phase only. Additionally, nanoinentation experiment revealed that the precipitation hardening of ω phase increased the hardness of β/B2 phase.",

keywords = "TNB alloy, high Nb containing TiAl based alloy, hot rolling, nanohardness, omega phase, phase transformation, rare earths",

author = "Shuzhi Zhang and Changjiang Zhang and Zhaoping Hou and Fantao Kong and Yuyong Chen",

note = "Publisher Copyright: {\textcopyright} 2016 The Chinese Society of Rare Earths.",

year = "2016",

month = feb,

day = "1",

doi = "10.1016/S1002-0721(16)60014-5",

language = "英语",

volume = "34",

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T1 - Effects of rolling deformation on microstructure and hardness of Ti-45Al-9Nb-0.3Y alloy

AU - Zhang, Shuzhi

AU - Zhang, Changjiang

AU - Hou, Zhaoping

AU - Kong, Fantao

AU - Chen, Yuyong

PY - 2016/2/1

Y1 - 2016/2/1

N2 - The microstructure evolution of as-rolled Ti-45Al-9Nb-0.3Y alloy as well as the nanohardness of β/B2 matrix was investigated by means of scanning electron microscopy (SEM) in backscattered electron mode (BSE) mode, transmission electron microscopy (TEM) and nanoindentation. This high Nb containing TiAl based alloy was rolled with 50%, 60%, 65% reduction, respectively. Omega phase precipitated in B2 phase with an orientation relationship of {110}β//{11 0}ω and <1 1>β//<0001>ω. Moreover, with the increase of deformation reduction, rod-like structure which was formed in γ grain transformed from (α2+γ) lamellae structure into α2 phase only. Additionally, nanoinentation experiment revealed that the precipitation hardening of ω phase increased the hardness of β/B2 phase.

AB - The microstructure evolution of as-rolled Ti-45Al-9Nb-0.3Y alloy as well as the nanohardness of β/B2 matrix was investigated by means of scanning electron microscopy (SEM) in backscattered electron mode (BSE) mode, transmission electron microscopy (TEM) and nanoindentation. This high Nb containing TiAl based alloy was rolled with 50%, 60%, 65% reduction, respectively. Omega phase precipitated in B2 phase with an orientation relationship of {110}β//{11 0}ω and <1 1>β//<0001>ω. Moreover, with the increase of deformation reduction, rod-like structure which was formed in γ grain transformed from (α2+γ) lamellae structure into α2 phase only. Additionally, nanoinentation experiment revealed that the precipitation hardening of ω phase increased the hardness of β/B2 phase.

KW - TNB alloy

KW - high Nb containing TiAl based alloy

KW - hot rolling

KW - nanohardness

KW - omega phase

KW - phase transformation

KW - rare earths

UR - https://www.scopus.com/pages/publications/84960129680

U2 - 10.1016/S1002-0721(16)60014-5

DO - 10.1016/S1002-0721(16)60014-5

M3 - 文章

AN - SCOPUS:84960129680

SN - 1002-0721

VL - 34

SP - 197

EP - 202

JO - Journal of Rare Earths

JF - Journal of Rare Earths

IS - 2

ER -

Effects of rolling deformation on microstructure and hardness of Ti-45Al-9Nb-0.3Y alloy

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Keywords

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