Transmission electron microscopy study of infrared brazed titanium alloy using clad Ti-25Cu-15Ni filler
Journal
ISIJ International
Journal Volume
49
Journal Issue
6
Pages
931-933
Date Issued
2009
Author(s)
Abstract
The infrared brazed Titanium alloy is examined using Ti-25Cu-15Ni and transmission electron microscopy (TEM). Infrared vacuum brazing SP-700 alloy was done at 970°C for 300s and 1800s, respectively. Ti-25Cu-15Ni foil in wt% with the thickness of 50μm was determined as the filler metal. The cross section of the brazed joint was examined using a JEOL JXA 8600SX electron probe microanalyzer (EPMA) equipped with the wavelength dispersive spectroscopy (WDS). The acceleration voltage was 15kv, and its minimum spot size was 1 μm. Thin foils were fabricated by a standard jet-polisher using an electrolyte of 6% HCIO4, 30% C2H5OH and 64% CH3COOH at room temperature. The results show that the depletion of Cu and Ni from the molten braze into SP-700 substrate is not prominent for the brazed joint with a short brazing cycle like 300s.
Type
journal article