The effect of postweld heat treatment on gas tungsten arc welded gamma titanium aluminide

Postweld heat treated (postweld heat treatment, PWHT) structures of gamma titanium aluminides were analyzed by optical microscopy and X-ray diffraction techniques. It was found that PWHT promotes the formation of the γ phase. This microstructural change resulted in the reduction of the fusion zone m...

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Bibliographic Details
Published in:Scripta materialia 2002-02, Vol.46 (3), p.241-246
Main Authors: Arenas, Mario F, Acoff, Viola L
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Intermetallic
Joining, thermal cutting: metallurgical aspects
Metals. Metallurgy
Optical microscopy
Titanium
Welding
X-ray diffraction
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Summary:Postweld heat treated (postweld heat treatment, PWHT) structures of gamma titanium aluminides were analyzed by optical microscopy and X-ray diffraction techniques. It was found that PWHT promotes the formation of the γ phase. This microstructural change resulted in the reduction of the fusion zone microhardness mainly due to the reduction of the hard, brittle α 2 phase.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(01)01232-5