Non-isothermal phase transformation kinetics of ω phase in TB-13 titanium alloys

Zhongbo Zhou; Minjie Lai; Bin Tang; Hongchao Kou; Hui Chang; Zhishou Zhu; Jinshan Li; Lian Zhou

doi:10.1016/j.msea.2010.03.064

Non-isothermal phase transformation kinetics of ω phase in TB-13 titanium alloys

Zhongbo Zhou, Minjie Lai, Bin Tang, Hongchao Kou, Hui Chang, Zhishou Zhu, Jinshan Li, Lian Zhou

School of Materials Sience and Engineering

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

33 Scopus citations

Abstract

The ω phase transformation kinetics of TB-13 titanium alloy has been analyzed by non-isothermal dilatometry. The average value of local activation energy determined is about 91.7. kJ/mol. The nucleation and growth mechanism of the ω phase has been investigated by the non-isothermal local Avrami exponent. Both the local Avrami exponent and the local activation energy during the ω phase transformation process change significantly with the transformed volume fraction, indicating that the ω phase transformation mechanism in this alloy varies at different stages. The local Avrami exponent lies between 1 and 2 in a wide transformed volume fraction range of 0.17-0.95, indicating that the dominating mechanism of ω phase transformation in TB-13 titanium alloy is the three-dimensional growth with a near-zero nucleation rate.

Original language	English
Pages (from-to)	5100-5104
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	527
Issue number	20
DOIs	https://doi.org/10.1016/j.msea.2010.03.064
State	Published - Jul 2010

Keywords

Kinetics
Non-isothermal
Phase transformation
Titanium alloy
ω Phase

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title = "Non-isothermal phase transformation kinetics of ω phase in TB-13 titanium alloys",

abstract = "The ω phase transformation kinetics of TB-13 titanium alloy has been analyzed by non-isothermal dilatometry. The average value of local activation energy determined is about 91.7. kJ/mol. The nucleation and growth mechanism of the ω phase has been investigated by the non-isothermal local Avrami exponent. Both the local Avrami exponent and the local activation energy during the ω phase transformation process change significantly with the transformed volume fraction, indicating that the ω phase transformation mechanism in this alloy varies at different stages. The local Avrami exponent lies between 1 and 2 in a wide transformed volume fraction range of 0.17-0.95, indicating that the dominating mechanism of ω phase transformation in TB-13 titanium alloy is the three-dimensional growth with a near-zero nucleation rate.",

keywords = "Kinetics, Non-isothermal, Phase transformation, Titanium alloy, ω Phase",

author = "Zhongbo Zhou and Minjie Lai and Bin Tang and Hongchao Kou and Hui Chang and Zhishou Zhu and Jinshan Li and Lian Zhou",

year = "2010",

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doi = "10.1016/j.msea.2010.03.064",

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journal = "Materials Science and Engineering: A",

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TY - JOUR

T1 - Non-isothermal phase transformation kinetics of ω phase in TB-13 titanium alloys

AU - Zhou, Zhongbo

AU - Lai, Minjie

AU - Tang, Bin

AU - Kou, Hongchao

AU - Chang, Hui

AU - Zhu, Zhishou

AU - Li, Jinshan

AU - Zhou, Lian

PY - 2010/7

Y1 - 2010/7

N2 - The ω phase transformation kinetics of TB-13 titanium alloy has been analyzed by non-isothermal dilatometry. The average value of local activation energy determined is about 91.7. kJ/mol. The nucleation and growth mechanism of the ω phase has been investigated by the non-isothermal local Avrami exponent. Both the local Avrami exponent and the local activation energy during the ω phase transformation process change significantly with the transformed volume fraction, indicating that the ω phase transformation mechanism in this alloy varies at different stages. The local Avrami exponent lies between 1 and 2 in a wide transformed volume fraction range of 0.17-0.95, indicating that the dominating mechanism of ω phase transformation in TB-13 titanium alloy is the three-dimensional growth with a near-zero nucleation rate.

AB - The ω phase transformation kinetics of TB-13 titanium alloy has been analyzed by non-isothermal dilatometry. The average value of local activation energy determined is about 91.7. kJ/mol. The nucleation and growth mechanism of the ω phase has been investigated by the non-isothermal local Avrami exponent. Both the local Avrami exponent and the local activation energy during the ω phase transformation process change significantly with the transformed volume fraction, indicating that the ω phase transformation mechanism in this alloy varies at different stages. The local Avrami exponent lies between 1 and 2 in a wide transformed volume fraction range of 0.17-0.95, indicating that the dominating mechanism of ω phase transformation in TB-13 titanium alloy is the three-dimensional growth with a near-zero nucleation rate.

KW - Kinetics

KW - Non-isothermal

KW - Phase transformation

KW - Titanium alloy

KW - ω Phase

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DO - 10.1016/j.msea.2010.03.064

M3 - 文章

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SN - 0921-5093

VL - 527

SP - 5100

EP - 5104

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 20

ER -

Non-isothermal phase transformation kinetics of ω phase in TB-13 titanium alloys

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Keywords

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