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Leistungsverbesserungen von Aluminium‐Schaum mit unterschiedlichen Lotzusammensetzungen durch Flüssigdiffusionsschweißen
Author(s) -
Yao C.,
Hu Z.F.,
Ren C.X.,
Feng Y.Q.,
Mo F.
Publication year - 2020
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201900230
Subject(s) - soldering , materials science , metal foam , welding , diffusion welding , aluminium , diffusion , composite material , metallurgy , thermodynamics , physics
Aluminum foam joints were fabricated via liquid diffusion welding with zinc‐aluminum alloy solder aided with ultrasonic vibration at 520 °C. Zinc‐aluminum alloys with different compositions (10 % aluminum, 20 % aluminum, 30 % aluminum) were used as solder material. The control group was fabricated under the same conditions but without ultrasonic assistance. The microstructure of aluminum foam joints was analyzed by optical microscopy, scanning electron microscopy, and energy dispersive spectroscopy. Among the different soldering alloys, those with the zinc‐20aluminum solder had the widest diffusion area and the most continuous interface. The tensile strength of metallurgic alloy joined aluminum foams was tested. Zn20Al samples had the best performance among all samples, including the low‐density substrate aluminum foam (0.3 g/cm 3 and 0.4 g/cm 3 ), but it still showed a lower performance than the high‐density substrate aluminum foam (0.6 g/cm 3 ). Therefore, ultrasonic vibration remarkably improved the tensile strength and impact toughness of joints. Samples with ultrasonic assistance had better tensile strength and impact toughness than high‐density substrate aluminum.