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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50742

Title: The Application of 40Ti-35Ni-25Nb Filler Foil in Brazing Commercially Pure Titanium
Authors: Shan-Bo Wang
Chuan-Sheng Kao
Leu-Wen Tsay
Ren-Kae Shiue
Contributors: 國立臺灣海洋大學:材料工程研究所
Keywords: vacuum brazing
titanium;eutectoid
clad filler foil
microstructure
Date: 2018-02
Issue Date: 2018-10-22T08:03:28Z
Publisher: Metals
Abstract: Abstract: The clad ternary 40Ti-35Ni-25Nb (wt %) foil has been applied in brazing commercially pure titanium (CP-Ti). The wavelength dispersive spectroscope (WDS) was utilized for quantitative chemical analyses of various phases/structures, and electron back scattered diffraction (EBSD) was used for crystallographic analyses in the brazed joint. The microstructure of brazed joint relies on the Nb and Ni distributions across the joint. For the β-Ti alloyed with high Nb and low Ni contents, the brazed zone (BZ), consisting of the stabilized β-Ti at room temperature. In contrast, eutectoid decomposition of the β-Ti into Ti2Ni and α-Ti is widely observed in the transition zone (TZ) of the joint. Although average shear strengths of joints brazed at different temperatures are approximately the same level, their standard deviations decreased with increasing the brazing temperature. The presence of inherent brittle Ti2Ni intermetallics results in higher standard deviation in shear test. Because the Ni content is lowered in TZ at a higher brazing temperature, the amount of eutectoid is decreased in TZ. The fracture location is changed from TZ into BZ mixed with α and β-Ti.
Relation: 8(3)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50742
Appears in Collections:[材料工程研究所] 期刊論文

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