Dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression

Jianlei Yang; Guofeng Wang; Xueyan Jiao; You Li; Kaifeng Zhang

doi:10.1080/02670836.2017.1415013

Dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression

Jianlei Yang
, Guofeng Wang^*
, Xueyan Jiao
, You Li
, Kaifeng Zhang

^*Corresponding author for this work

Harbin Institute of Technology

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

11 Scopus citations

Abstract

The dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression at 970°C/0.01 s⁻¹ and strain of 30%, 50% and 70% was investigated. The results showed the lamellar-O phase that participated in the B2 matrix could be obtained by hot pressed sintering from pre-alloy powders. The corresponding scanning electron microscopy, electron backscattered diffraction and transmission electron microscopy observations indicated that the dynamic spheroidisation process can be divided into three stages, the first is the primary interphase high-energy defect stage, introduced by dislocation migration twinning and localised shearing. The second is the separation, and the last is the spheroidisation stages, which could be explained by boundary splitting and termination migration.

Original language	English
Pages (from-to)	961-967
Number of pages	7
Journal	Materials Science and Technology (United Kingdom)
Volume	34
Issue number	8
DOIs	https://doi.org/10.1080/02670836.2017.1415013
State	Published - 24 May 2018
Externally published	Yes

Keywords

TiAlNb
dynamic spheroidisation
hot compression
lamellar microstructure

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10.1080/02670836.2017.1415013

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title = "Dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression",

abstract = "The dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression at 970°C/0.01 s−1 and strain of 30\%, 50\% and 70\% was investigated. The results showed the lamellar-O phase that participated in the B2 matrix could be obtained by hot pressed sintering from pre-alloy powders. The corresponding scanning electron microscopy, electron backscattered diffraction and transmission electron microscopy observations indicated that the dynamic spheroidisation process can be divided into three stages, the first is the primary interphase high-energy defect stage, introduced by dislocation migration twinning and localised shearing. The second is the separation, and the last is the spheroidisation stages, which could be explained by boundary splitting and termination migration.",

keywords = "TiAlNb, dynamic spheroidisation, hot compression, lamellar microstructure",

author = "Jianlei Yang and Guofeng Wang and Xueyan Jiao and You Li and Kaifeng Zhang",

note = "Publisher Copyright: {\textcopyright} 2017, {\textcopyright} 2017 Institute of Materials, Minerals and Mining.",

year = "2018",

month = may,

day = "24",

doi = "10.1080/02670836.2017.1415013",

language = "英语",

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}

TY - JOUR

T1 - Dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression

AU - Yang, Jianlei

AU - Wang, Guofeng

AU - Jiao, Xueyan

AU - Li, You

AU - Zhang, Kaifeng

PY - 2018/5/24

Y1 - 2018/5/24

N2 - The dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression at 970°C/0.01 s−1 and strain of 30%, 50% and 70% was investigated. The results showed the lamellar-O phase that participated in the B2 matrix could be obtained by hot pressed sintering from pre-alloy powders. The corresponding scanning electron microscopy, electron backscattered diffraction and transmission electron microscopy observations indicated that the dynamic spheroidisation process can be divided into three stages, the first is the primary interphase high-energy defect stage, introduced by dislocation migration twinning and localised shearing. The second is the separation, and the last is the spheroidisation stages, which could be explained by boundary splitting and termination migration.

AB - The dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression at 970°C/0.01 s−1 and strain of 30%, 50% and 70% was investigated. The results showed the lamellar-O phase that participated in the B2 matrix could be obtained by hot pressed sintering from pre-alloy powders. The corresponding scanning electron microscopy, electron backscattered diffraction and transmission electron microscopy observations indicated that the dynamic spheroidisation process can be divided into three stages, the first is the primary interphase high-energy defect stage, introduced by dislocation migration twinning and localised shearing. The second is the separation, and the last is the spheroidisation stages, which could be explained by boundary splitting and termination migration.

KW - TiAlNb

KW - dynamic spheroidisation

KW - hot compression

KW - lamellar microstructure

UR - https://www.scopus.com/pages/publications/85038379048

U2 - 10.1080/02670836.2017.1415013

DO - 10.1080/02670836.2017.1415013

M3 - 文章

AN - SCOPUS:85038379048

SN - 0267-0836

VL - 34

SP - 961

EP - 967

JO - Materials Science and Technology (United Kingdom)

JF - Materials Science and Technology (United Kingdom)

IS - 8

ER -

Dynamic spheroidisation behaviour of the lamellar Ti–22Al–25Nb alloy during hot compression

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Keywords

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