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

Abstract:

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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:

Edited by:

H. Balmori-Ramírez, M. Brito, J.G. Cabañas-Moreno, H.A. Calderón-Benavides, K. Ishizaki and A. Salinas-Rodríguez

Pages:

165-170

DOI:

10.4028/www.scientific.net/MSF.509.165

Citation:

A. Kabatskaia Ivanovna et al., "Microstructural and Mechanical Characterization of Nitinol GTAW and FB Welds of Titanium", Materials Science Forum, Vol. 509, pp. 165-170, 2006

Online since:

March 2006

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$35.00

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