Microstructure and Mechanical Properties of Powder Metallurgy Ti-22Al-24Nb-0.5Mo Alloys Joints with Electron Beam Welding

In this work, a Ti2AlNb based intermetallic alloy with the composition of Ti–22Al–24Nb–0.5Mo (at. %) pre-alloyed powder was firstly produced by gas atomization, and then fully dense powder metallurgy (PM) Ti2AlNb alloy was prepared by a hot isostatic pressing (HIPing) procedure. The HIPed alloy show...

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Bibliographic Details
Published inMaterials science forum Vol. 849; pp. 321 - 326
Main Authors Wu, Jie, Cui, Yu You, Lu, Zheng Guan, Xu, Lei, Yang, Rui, Guo, Rui Peng
Format Journal Article
LanguageEnglish
Published Pfaffikon Trans Tech Publications Ltd 01.03.2016
Subjects
Heat treating
Materials science
Mechanical properties
Microstructure
Powder metallurgy
Titanium alloys
Tomography
Joint Quality
Ti2AlNb Alloys
Electron Beam Welding
Powder metallurgy
Microstructure
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Summary:In this work, a Ti2AlNb based intermetallic alloy with the composition of Ti–22Al–24Nb–0.5Mo (at. %) pre-alloyed powder was firstly produced by gas atomization, and then fully dense powder metallurgy (PM) Ti2AlNb alloy was prepared by a hot isostatic pressing (HIPing) procedure. The HIPed alloy shows uniform microstructure with low number of porosities. In order to broaden the application field of PM Ti2AlNb alloys, electron beam welding (EBW) was proposed to join the intermetallics. The joint quality, microstructure and microhardness of PM Ti2AlNb alloy processed by EBW were characterized, and the results showed that the both base alloy and EBW joints have high metallurgy quality.
Bibliography:Selected, peer reviewed papers from the Chinese Materials Conference 2015, July 10-14, 2015, Guiyang, China
ISSN:0255-5476
1662-9752
1662-9752
DOI:10.4028/www.scientific.net/MSF.849.321