Capacitor discharge welding: Analysis through ultrahigh-speed photography

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Welding Journal (Miami); (United States)

OSTI ID:6585932

Wilson, Jr, R D; Woodyard, J R ^[1]; Devletian, J H ^[2]

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1. Bureau of Mines, Albany, NY (United States)
2. Oregon Graduate Inst. of Science and Technology, Beaverton (United States)

Ultrahigh-speed photography of 44,000 frames/s was used to investigate the capacitor discharge welding (CDW) process. The objective of the study was to use high-speed photography and a finite element computer program to help describe the heat flow characteristics of the CDW cycle. The photos revealed that the plasma jet from the cathode was responsible for expelling metal from the anode rather than being squeezed out on contact. Photographic evidence suggested that the unequal anode/cathode heating ratio is primarily due to heat transfer from the anode to the expelled metal particles.

• OSTI ID: 6585932
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 72:3; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ANODES
CATHODES
COMPUTER CODES
ELECTRODES
ENERGY TRANSFER
FABRICATION
HEAT AFFECTED ZONE
HEAT TRANSFER
JOINING
PHASE TRANSFORMATIONS
PHOTOGRAPHY
PLASMA JETS
SOLIDIFICATION
WELDABILITY
WELDING
ZONES