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Wetting and spreading behavior of Ti-based brazing filler on Ti64 substrate

Title:

Wetting and spreading behavior of Ti-based brazing filler on Ti64 substrate

Komolafe, Bolarinwa and Mostafa, Ahmad ORCID: https://orcid.org/0000-0001-5625-1106 (2011) Wetting and spreading behavior of Ti-based brazing filler on Ti64 substrate. Materials research express, 4 (6). 066503. ISSN 2053-1591

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Official URL: http://dx.doi.org/10.1088/2053-1591/aa7311

Abstract

In this work, wetting behavior of Ti–20Zr–20Cu–20Ni brazing filler on Ti–6Al–4V substrate was studied using sessile drop technique. Effects of the substrate surface roughness, R a of ~0.40 and 0.08 µm, and heating scheme on wetting and spreading of the filler metal were evaluated. The wetting mechanism was investigated by the combination of cooling technique, thermal, compositional, and microstructural analysis. This was performed using a heat-flux DSC and an SEM equipped with EDS. The degree of wetting was evaluated by measuring the apparent dynamic contact angle between the filler drop and substrate surface and by calculating the drop spread ratio. The surface roughness of the substrate was found to have little or no effect on the final apparent contact angle. The wetting behavior of this system showed a reactive nature, because it involves dissolution of the substrate and formation of interfacial layers. Three heating schemes were used in the current study. While the high heating rate of 6.8 °C s−1 was found to limit the metallurgical reaction between the substrate and the brazing filler, in the low heating rate scheme of 1.7 °C s−1, more intense metallurgical reaction occurred between the brazing filler and the substrate. The high heating rate with soaking scheme is recommended for brazing, because it entails extensive spreading and limited metallurgical reaction between the brazing filler and the substrate.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Article
Refereed:Yes
Authors:Komolafe, Bolarinwa and Mostafa, Ahmad
Journal or Publication:Materials research express
Date:2 June 2011
Funders:
  • NSERC
Digital Object Identifier (DOI):10.1088/2053-1591/aa7311
Keywords:brazing filler, reactive wetting, spreading, Ti–6Al–4V alloy, wetting
ID Code:982592
Deposited By: AHMAD MOSTAFA
Deposited On:05 Jun 2017 20:30
Last Modified:01 Jun 2018 00:00
Related URLs:

References:

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