Microstructure and mechanical properties of Ti-6Al-4V welds using a, near-a and a+ß filler alloys

Effects of filler metal on the microstructure and mechanical properties of Ti-6Al-4V joints were investigated. Three specimens were prepared using a, near-a and a+β type filler materials and one specimen was welded without filler metal. The microstructural characterizations, hardness and tensile tes...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2017-08, Vol.702, p.272
Main Authors: Abbasi, K, Beidokhti, B, Sajjadi, SA
Format: Article
Language:English
Subjects:
Base metal
Colonies
Filler metals
Fractures
Grain boundaries
Hardness
Martensite
Mechanical properties
Microstructure
Tensile tests
Titanium alloys
Titanium base alloys
Weld metal
Welded joints
Welding
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Summary:Effects of filler metal on the microstructure and mechanical properties of Ti-6Al-4V joints were investigated. Three specimens were prepared using a, near-a and a+β type filler materials and one specimen was welded without filler metal. The microstructural characterizations, hardness and tensile tests were applied to study the welded specimens. For the specimen welded without filler material, a coarse-grained structure of a+β was found in the microstructure of weld metal. Although this specimen showed lower hardness values compared to the base metal; the hardness of other weld metals was higher than that of the base material. The microstructure of other welds was a mixture of a, β and some amount of a...-martensite. Both acicular and basketweave morphologies of a... were found in the weld metal. The a colonies were grown from the a lamellae which were formed at the β grain boundaries. The highest tensile strength was obtained for the specimen welded with the matching filler metal (about 91% of the base metal).
ISSN:0921-5093
1873-4936