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Diode laser brazing of aluminium alloy (A5052) to interstitial free steel (IF steel) or type 304 stainless steel (SUS304) was conducted using aluminium filler metal (BA4047) with Nocolock flux. The processing parameters of laser power, wire feed rate and travel speed were varied. The strength of lap joints of A5052 on steels was evaluated by tensile shear test. The joint strength of A5052/steels was increased with increasing laser power and reached the maximum strength, more than approximately 80% of the A5052 base metal strength, at a laser power of 1300 W. Voids and incomplete penetration of filler metal were observed at the A5052/braze layer interface when the laser power was below 1100 W. The Fe–Al intermetallic compounds were formed at the steel/braze layer interfaces and grew drastically when the laser power exceeded 1300 W. Superior brazability of A5052/steels was found at brazing conditions corresponding to a temperature of filler metal droplet of 1050–1250 K.

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Prolongation of onset latency across the carpal tunnel during segmental conduction study of the median sensory nerve was common in healthy adults. When comparing proximal and distal segments for diagnosis of carpal tunnel syndrome, using onset latency as a diagnostic variable may cause greater reporting of false positives.

Dissimilar diode-laser brazing of A5052/IF steel and A5052/SUS304 has been conducted using BA4047 filler metal with Nocolock flux KAlF4+K3AlF6 . The processing parameters such as laser power, wire feeding speed and travel speed were varied while defocusing distance and shielding gas Ar flow rate were constant. Strength of lap joints of A5052 on steels was evaluated by tensile shear test. Fracture strength of A5052/steels joints was increased with increasing laser power and reached the maximum strength more than about 80% of the A5052 base metal strength at laser power of 1300 W. Fracture position shifted from at the A5052/braze layer interface to at the steels/braze layer interface with increasing laser power. The voids and incomplete penetration of filler metal were observed at the A5052/braze layer interface when the laser power was below 1100 W. The Fe-Al intermetallic compounds were formed at the steels/braze layer interface and grew drastically when the laser power exceeded 1300 W. The superior brazability of A5052/steels was indicated at the brazing conditions corresponded to the temperature of melted droplet of BA4047 filler metal being 1050-1250 K during laser brazing process.