Ti-6Al-4V與異種金屬硬銲之研究(2/3)
Date Issued
2005
Date
2005
Author(s)
DOI
932216E002028
Abstract
The purpose of this research is focused in vacuum brazing, including traditional vacuum
furnace brazing as well as infrared brazing, Ti-6Al-4V and Nb metal using pure Ag, BAg-8
(72Ag-28Cu) and 95Ag-5Al, respectively. Based on dynamic wetting angle measurements and
microstructural observation of the brazed interface, excessive brittle intermetallic compounds are
formed using Ag, BAg-8 and 95Ag-5Al as the brazing fillers. The infrared brazed joint using
BAg-8 and 95Ag-5Al have the highest average shear strength of 224.1 and 172.8 MPa
respectively. The averaged shear strength of the brazed joint is decreased with increasing
brazing temperature and/or time, and its fracture location changes from the braze alloy into the
interfacial reaction layer(s) due to excessive growth of the Cu-Ti or Ti3Al intermetallics. The
application of rapid infrared brazing can effectively inhibit the formation of intermetallics during
brazing. The deterioration of base metal due to high brazing temperature can also be avoided,
so better quality of the brazed joint is achieved.
Subjects
vacuum brazing
titanium alloys
niobium metal
silver-base filler metals
microstructure
interface
shear test
Publisher
臺北市：國立臺灣大學材料科學與工程學系暨研究所
Type
report
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