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Effect of Ti on Microstructure and Properties of Tungsten Heavy Alloy Joint Brazed by CuAgTi Filler Metal.
- Source :
- Materials (1996-1944); 4/1/2019, Vol. 12 Issue 7, p1057-1057, 1p
- Publication Year :
- 2019
-
Abstract
- 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<subscript>3</subscript>Cu<subscript>4</subscript> 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<subscript>2</subscript>Cu layer at the interface, leaving a Cu-rich/Ti-poor area on the side. Remaining Ti and Cu elements form the acicular Ti<subscript>3</subscript>Cu<subscript>4</subscript> 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<superscript>2</superscript> to 320.9 mm<superscript>2</superscript> 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 12
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Materials (1996-1944)
- Publication Type :
- Academic Journal
- Accession number :
- 135899045
- Full Text :
- https://doi.org/10.3390/ma12071057