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Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal

In this paper, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD) were used to comprehensively analyze the microstructure and brazing performance of a CuAgTi filler metal with braze tungsten heavy alloys. The association of microstructure, wettabi...

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Autores principales: Lu, Yuzhen, Qiu, Xiaoming, Ruan, Ye, Luo, Cui, Xing, Fei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480020/
https://www.ncbi.nlm.nih.gov/pubmed/30935073
http://dx.doi.org/10.3390/ma12071057
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author Lu, Yuzhen
Qiu, Xiaoming
Ruan, Ye
Luo, Cui
Xing, Fei
author_facet Lu, Yuzhen
Qiu, Xiaoming
Ruan, Ye
Luo, Cui
Xing, Fei
author_sort Lu, Yuzhen
collection PubMed
description In this paper, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD) were used to comprehensively analyze the microstructure and brazing performance of a CuAgTi filler metal with braze tungsten heavy alloys. The association of microstructure, wettability and shear strength of brazing joints was also investigated. With the addition of Ti, the Ti(3)Cu(4) phase appeared in the microstructure of filler metal. Ti is active element that promotes the reaction of filler with tungsten. Therefore, the Ti element is enriched around tungsten and forms a Ti(2)Cu layer at the interface, leaving a Cu-rich/Ti-poor area on the side. Remaining Ti and Cu elements form the acicular Ti(3)Cu(4) structure at the center of the brazing zone. The wettability of filler metal is improved, and the spreading area is increased from 120.3 mm(2) to 320.9 mm(2) with the addition of 10 wt.% Ti. The shear strength of joint reaches the highest level at a Ti content of 2.5 wt.%, the highest shear strength is 245.6 MPa at room temperature and 142.2 MPa at 400 °C.
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spelling pubmed-64800202019-04-29 Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal Lu, Yuzhen Qiu, Xiaoming Ruan, Ye Luo, Cui Xing, Fei Materials (Basel) Article In this paper, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD) were used to comprehensively analyze the microstructure and brazing performance of a CuAgTi filler metal with braze tungsten heavy alloys. The association of microstructure, wettability and shear strength of brazing joints was also investigated. With the addition of Ti, the Ti(3)Cu(4) phase appeared in the microstructure of filler metal. Ti is active element that promotes the reaction of filler with tungsten. Therefore, the Ti element is enriched around tungsten and forms a Ti(2)Cu layer at the interface, leaving a Cu-rich/Ti-poor area on the side. Remaining Ti and Cu elements form the acicular Ti(3)Cu(4) structure at the center of the brazing zone. The wettability of filler metal is improved, and the spreading area is increased from 120.3 mm(2) to 320.9 mm(2) with the addition of 10 wt.% Ti. The shear strength of joint reaches the highest level at a Ti content of 2.5 wt.%, the highest shear strength is 245.6 MPa at room temperature and 142.2 MPa at 400 °C. MDPI 2019-03-30 /pmc/articles/PMC6480020/ /pubmed/30935073 http://dx.doi.org/10.3390/ma12071057 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lu, Yuzhen
Qiu, Xiaoming
Ruan, Ye
Luo, Cui
Xing, Fei
Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal
title Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal
title_full Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal
title_fullStr Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal
title_full_unstemmed Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal
title_short Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal
title_sort effect of ti on microstructure and properties of tungsten heavy alloy joint brazed by cuagti filler metal
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480020/
https://www.ncbi.nlm.nih.gov/pubmed/30935073
http://dx.doi.org/10.3390/ma12071057
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