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- W2362788105 abstract "The electrical arc welding frequency was modulated to excite ultrasonic waves in submerged arc welding of cryogenic 09MnNiDR steel.The arc-excited ultrasonic welding procedure was evaluated by comparing conventional welding techniques with arc-excited ultrasonic welding at different frequencies.Metallographic analyses show that the ultrasonic welding significantly refines the grains with more acicular ferrite appears in the fusion zone.Impact tests show that the ultrasonic welding also enhances the joint impact toughness.At 50 kHz,the impact toughness at-70 ℃ was improved by nearly 50% both in the fusion zone and in the heat affected zone compared with welding without ultrasonic excitement.Scan electron microscope(SEM fractography shows that fractures changes from cleavage fractures without ultrasonic to gliding fractures with ultrasonic welding.The arc-excited ultrasonic welding also reduces the welding line-energy sensitivity and improves production efficiency." @default.
- W2362788105 created "2016-06-24" @default.
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- W2362788105 date "2006-01-01" @default.
- W2362788105 modified "2023-09-23" @default.
- W2362788105 title "Arc-excited ultrasonic welding to improve the quality of 09MnNiDR joints" @default.
- W2362788105 hasPublicationYear "2006" @default.
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