Brazing of titanium by Cu-P brazing filler metals

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:151258

Ariga, Tadashi; Matsu, Kotaro; Miyazawa, Yasuyuki

Brazing of commercially pure titanium materials was made using the two types of the copper-phosphorus brazing filler metal foil. Two types of the brazing filler metal foils, BCuP-2 and -3 (AWS classification number), were used in this study. The chemical compositions of BCuP-2 and -3 were Cu-7.2P and Cu-6P-5Ag. Brazing was done in an argon gas atmosphere. After brazing, cutting, and polishing of the specimen, the mechanical properties of the specimen were estimated by shear strength test. And the cross-sectional microstructures at the brazed joint were observed by optical microscope and the elemental distributions at the brazed joint were analyzed by SENM and EPMA examinations. A sound brazed joint was obtained in this study. The maximum shear strength of the specimen was about 300 MPa in this study. According to observation of the cross-sectional microstructures, the reaction layer was formed at the base metal/brazed layer interface. The fracture during the shear test occurred in this reaction layer. And the phosphorus element was concentrated in this layer. Therefore, it appeared that the behavior of phosphorus element influenced the brazeability of these specimen.

• OSTI ID: 151258
• Report Number(s): CONF-9404233--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BRAZED JOINTS
BRAZING
BRAZING ALLOYS
COPPER
FILLER METALS
FOILS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHOSPHORUS
SHEAR PROPERTIES
SILVER
TITANIUM