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Published in:
Effects of Internal Oxidation Methods on Microstructures and Properties of Al2O3 Dispersion-Strengthened Copper Alloys Read chapter Read first chapter

2018 | OriginalPaper | Chapter

Effect of Oxygen Content of Powders on Previous Particle Boundaries in Hot Isostatic Pressed TiAl Alloy

Authors : Yufeng Liu, Zhou Li, Na Liu, Liang Zheng, Wenyong Xu

Published in: High Performance Structural Materials

Publisher: Springer Singapore

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Abstract

Argon gas atomized Ti–43Al–9V–0.3Y alloy powders with oxygen contents of 1150 and 550 ppm respectively were hot isostatic pressed (HIPed) at 1200 °C and 150 MPa for 3 h to obtain full density compacts. The effect of powders oxygen content on previous particle boundaries (PPBs) was investigated. Results show that PPBs only were observed in the HIPed compact produced from the powders with 1150 ppm oxygen content, and higher oxygen content promoted the formation of PPBs in TiAl alloy. SEM and TEM analysis proved that the microstructure at PPBs was α2/γ lamellar. Oxygen was the α2 phase stabilizer, and it restricted the α → γ transformation but drived the α → α2 + γ eutectoid process in which the lamellar formed.

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previous chapter Heat Treatment of a New Designed Ni-Based Single Crystal Superalloy
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Metadata
Title
Effect of Oxygen Content of Powders on Previous Particle Boundaries in Hot Isostatic Pressed TiAl Alloy
Authors
Yufeng Liu
Zhou Li
Na Liu
Liang Zheng
Wenyong Xu
Copyright Year
2018
Publisher
Springer Singapore
Book
High Performance Structural Materials

Print ISBN: 978-981-13-0103-2

Electronic ISBN: 978-981-13-0104-9

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-981-13-0104-9_83

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