Rao, P Rama and Bhatnagar, Anil K and Majumdar, Bhaskar and Muraleedharan, K (2019) Microstructural Evolution of Brazed Ti-joint Using Ti20Zr20Cu50Ni10 Metallic Glass Ribbon as Filler. In: 2ND INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY AND EXHIBITION 2018 (SICE 2018), JUL 25-27, 2018, Hyderabad, INDIA.

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Abstract

Metallic glasses of Ti20Zr20Cu50Ni10 in the form of hard ribbon were produced by the standard melt-spinning technique on copper roller wheel in air. Vacuum brazing using these ribbons were done to join two plates of Ti alloy at 990 K for a period of 10 min. The main aim of the present work was to study the use of the metallic glass ribbons as brazing material for titanium based alloys. Since the microstructure during crystallization of these metallic glasses is expected to influence the strength of brazing joints, microstructure characterization is very important. Here we present the results of characterization of the ribbons with Ti20Zr20Cu50Ni10 composition as well as the brazed sample after joining two Ti-plates. Both as-spun and heat-treated ribbon were characterized by X-ray Diffractometry (XRD), Field-Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM) and the energy dispersive X-ray spectroscopy (EDX) attached to both TEM and FESEM. The as-prepared ribbons showed amorphous nature when examined on both surfaces by XRD and as was also verified by TEM study of heat treated (753 K, 30 min.) ribbon showed formation of nanocrystalline microstructure comprised of equiaxed grains having sizes in the range of about 50-200 nm. Electron diffraction analysis in the TEM suggested the presence of two phases, viz., cubic Ti2Ni and (Ti, Zr)(2)Ni phases. (C) 2019 The Authors. Published by Elsevier B.V.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	2nd International Conference on Structural Integrity and Exhibition (SICE), Hyderabad, INDIA, JUL 25-27, 2018
Subjects:	Engineering Materials
Divisions:	Computer Cell
Depositing User:	Bidhan Chaudhuri
Date Deposited:	18 Nov 2019 11:15
Last Modified:	18 Nov 2019 11:15
URI:	http://cgcri.csircentral.net/id/eprint/4651

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