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Microstructural and Mechanical Characterization of Nitinol GTAW and FB Welds of Titanium

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Abstract:

Microstructural and mechanical characterization of Nitinol gas tungsten arc weld (GTAW) and furnace brazing (FB) welds for grade 1 titanium plates are carried out in order to study the microstructure developed after welding and its effect on the mechanical properties of welds. The GTAW process yields the highest hardness weld. The constituents for this weld consist of a dendritic structure of NiTi and NiTi2 intermetallic phases. The FB process promotes a change of the welds chemical composition due to atomic diffusion of Ti. The weld microconstituents consist of a mixture of a Ti-rich and NiTi2 eutectic and a proeutectic Ti-rich phase.

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Periodical:

Materials Science Forum (Volume 509)

Pages:

165-170

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.509.165

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Online since:

March 2006

Authors:

Alla Kabatskaia Ivanovna, Victor M. López-Hirata, Eduardo Oliva López, Ricardo Rodríguez Figueroa, Jorge Rodríguez Miramontes

Keywords:

Furnace Brazing, Gas Tungsten Arc Welding, Nitinol, Titanium (Ti)

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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