TY - GEN
T1 - An analysis of an impact of the background atmosphere on the aluminum brazing joint formation
AU - Yu, Cheng Nien
AU - Hawksworth, Doug K.
AU - Sekulic, Dusan P.
PY - 2013
Y1 - 2013
N2 - This paper summarizes mapping of an impact of the background atmosphere on a brazed joint formation. The broad range of background atmosphere conditions was considered. Two main parameters include: (i) the oxygen content in the range of 20 ppm to 200,000 ppm, and (ii) the dew point temperature in the range of 225 K to 266 K. The metrics used to evaluate that impact involve multiple joint fillet topographical features. The assessment was performed following detailed brazeability studies of the experimental specimens. The experimental program has involved Controlled Atmosphere Brazing of a wedge-tee brazing sheet mating surface with a variable gap clearance (over the length of 50 mm), to a nonclad AA3003 sheet. Brazing was performed (i) without or (ii) with a coating of the potassium-fluoro-Aluminate flux. The tests were performed in a transparent hot zone brazing furnace. The peak brazing temperature in all tests was at the 873 K level, with the ramp-up heating of less than 100 K per minute and a rapid quench in industrial grade Nitrogen.
AB - This paper summarizes mapping of an impact of the background atmosphere on a brazed joint formation. The broad range of background atmosphere conditions was considered. Two main parameters include: (i) the oxygen content in the range of 20 ppm to 200,000 ppm, and (ii) the dew point temperature in the range of 225 K to 266 K. The metrics used to evaluate that impact involve multiple joint fillet topographical features. The assessment was performed following detailed brazeability studies of the experimental specimens. The experimental program has involved Controlled Atmosphere Brazing of a wedge-tee brazing sheet mating surface with a variable gap clearance (over the length of 50 mm), to a nonclad AA3003 sheet. Brazing was performed (i) without or (ii) with a coating of the potassium-fluoro-Aluminate flux. The tests were performed in a transparent hot zone brazing furnace. The peak brazing temperature in all tests was at the 873 K level, with the ramp-up heating of less than 100 K per minute and a rapid quench in industrial grade Nitrogen.
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U2 - 10.1115/IMECE2013-64776
DO - 10.1115/IMECE2013-64776
M3 - Conference contribution
AN - SCOPUS:84903439070
SN - 9780791856192
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
BT - Advanced Manufacturing
T2 - ASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013
Y2 - 15 November 2013 through 21 November 2013
ER -