A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy

A new mechanism of dynamic phase transformations of α<sub>2</sub> ↔ γ in an isothermally forged γ-TiAl-based alloy that occur simultaneously during a short-term exposure at 1000 °C is identified in this study. In the heating process, &#94...

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Main Authors:	Zhengang Zhang, Shoujiang Qu, Guorong Cui, Aihan Feng, Jun Shen, Daolun Chen
Format:	Article
Language:	English
Published:	MDPI AG 2019-08-01
Series:	Materials
Subjects:	titanium aluminide phase transformation precipitation microstructure
Online Access:	https://www.mdpi.com/1996-1944/12/17/2787

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record_format	Article
spelling	doaj-cea6616e84994dc3bd60be98189e24942020-11-24T20:42:49ZengMDPI AGMaterials1996-19442019-08-011217278710.3390/ma12172787ma12172787A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic AlloyZhengang Zhang0Shoujiang Qu1Guorong Cui2Aihan Feng3Jun Shen4Daolun Chen5School of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaSchool of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaSchool of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaDepartment of Mechanical and Industrial Engineering, Ryerson University, Toronto, ON M5B 2K3, CanadaA new mechanism of dynamic phase transformations of α<sub>2</sub> ↔ γ in an isothermally forged γ-TiAl-based alloy that occur simultaneously during a short-term exposure at 1000 °C is identified in this study. In the heating process, γ phase significantly decreases through a phase transformation of γ → α<sub>2</sub>, while new γ lamellae are precipitated in the interior of equiaxed grains of α<sub>2</sub> phase through a phase transformation of α<sub>2</sub> → γ. The reasons for the presence of these two inverse phase transformations α<sub>2</sub> ↔ γ occurring simultaneously are discussed.https://www.mdpi.com/1996-1944/12/17/2787titanium aluminidephase transformationprecipitationmicrostructure
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zhengang Zhang Shoujiang Qu Guorong Cui Aihan Feng Jun Shen Daolun Chen
spellingShingle	Zhengang Zhang Shoujiang Qu Guorong Cui Aihan Feng Jun Shen Daolun Chen A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy Materials titanium aluminide phase transformation precipitation microstructure
author_facet	Zhengang Zhang Shoujiang Qu Guorong Cui Aihan Feng Jun Shen Daolun Chen
author_sort	Zhengang Zhang
title	A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy
title_short	A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy
title_full	A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy
title_fullStr	A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy
title_full_unstemmed	A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy
title_sort	new mechanism of dynamic phase transformations in an isothermal forged beta–gamma intermetallic alloy
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2019-08-01
description	A new mechanism of dynamic phase transformations of α<sub>2</sub> ↔ γ in an isothermally forged γ-TiAl-based alloy that occur simultaneously during a short-term exposure at 1000 °C is identified in this study. In the heating process, γ phase significantly decreases through a phase transformation of γ → α<sub>2</sub>, while new γ lamellae are precipitated in the interior of equiaxed grains of α<sub>2</sub> phase through a phase transformation of α<sub>2</sub> → γ. The reasons for the presence of these two inverse phase transformations α<sub>2</sub> ↔ γ occurring simultaneously are discussed.
topic	titanium aluminide phase transformation precipitation microstructure
url	https://www.mdpi.com/1996-1944/12/17/2787
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A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy

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