Dual Beam Laser Welding
An experiment in which a high-power CO2 laser beam was split into two equalpower
beams that were then used as a welding heat source indicated the dualbeam
laser could significantly improve weld quality.
BY J. XIE Posted 9/02 | Published 10/02
Keyhole Double-Sided Arc Welding Process
A process is developed for deep joint penetration welding
in a narrow groove on plate up to 1/2-in. thick.
BY Y. M. ZHANG, S. B. ZHANG, AND M. JIANG. Posted 11/02 | Published 11/02
The Mechanism of Stress-Relief Cracking
in a Ferritic Alloy Steel
A novel stress-relaxation technique and extensive microstructural characterization
of the carbide precipitation, elemental segregation, and fracture modes were used
to investigate stress-relief cracking in a ferritic alloy steel.
BY J. G. NAWROCKI, J. N. DUPONT, C. V. ROBINO, J. D. PUSKAR, AND A. R. MARDER Posted 2/03 | Published 2/03