ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Influence of Bonding Temperature on Structure and Strength Properties of Titanium and Micro-duplex Stainless Steel Diffusion Bonded Joints
Sukumar KunduSubrata Chatterjee
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2009 Volume 49 Issue 11 Pages 1749-1754

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Abstract

In the present study, diffusion bonding of titanium and micro-duplex stainless steel was investigated in vacuum. Diffusion interfaces were characterized using light microscopy, scanning electron microscopy and X-ray diffraction technique. The inter-diffusion of the chemical species across the diffusion interfaces were evaluated by electron probe microanalysis (EPMA). The maximum tensile strength of ~97% and shear strength of ~80% of those of Ti along with 6.9% elongation were obtained for the diffusion couple processed at 900°C joining temperature. Fracture surface observation in SEM using EDS demonstrates that, failure takes place through β-Ti phase when bonding was processed up to 850°C, however, failure takes place through λ+FeTi+β-Ti for the diffusion couples processed at 900°C and above bonding temperature.

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© 2009 by The Iron and Steel Institute of Japan
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