TY - JOUR
T1 - Effects of gravitational orientation on surface deformation and weld pool geometry during gas tungsten arc welding
AU - Kang, N.
AU - Mahank, T. A.
AU - Kulkarni, A. K.
AU - Singh, J.
N1 - Funding Information:
The research was supported by NASA Materials Microgravity Division, Grant NAG8-1272. The authors also gratefully acknowledge the Laser Processing Division at the Applied Research Laboratory for making available the laser profilometer.
PY - 2003/3
Y1 - 2003/3
N2 - Effects of gravitational orientation on gas tungsten arc (GTA) welding of nickel were studied to determine the impact of free-surface deformation on weld-pool shape. This was accomplished through GTA welding and a numerical study of the welding process. Welding was conducted by varying scan velocity and gravitational orientation, e.g., welding upward opposing gravity (parallel-up weld), welding downward with gravity (parallel-down weld), and welding perpendicular to gravity (perpendicular weld). Slower scan velocity produced more significant free surface deformation. Gravitational orientation caused 21% deeper penetration in the parallel-up weld compared with the parallel-down weld (resulting from 50% or more maximum surface deformation). Weld penetration of the perpendicular weld was between that of parallel-up and parallel-down cases. A model of the welding process, in which an experimentally generated free surface was implemented as a boundary condition, supported the results by showing similar trends.
AB - Effects of gravitational orientation on gas tungsten arc (GTA) welding of nickel were studied to determine the impact of free-surface deformation on weld-pool shape. This was accomplished through GTA welding and a numerical study of the welding process. Welding was conducted by varying scan velocity and gravitational orientation, e.g., welding upward opposing gravity (parallel-up weld), welding downward with gravity (parallel-down weld), and welding perpendicular to gravity (perpendicular weld). Slower scan velocity produced more significant free surface deformation. Gravitational orientation caused 21% deeper penetration in the parallel-up weld compared with the parallel-down weld (resulting from 50% or more maximum surface deformation). Weld penetration of the perpendicular weld was between that of parallel-up and parallel-down cases. A model of the welding process, in which an experimentally generated free surface was implemented as a boundary condition, supported the results by showing similar trends.
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U2 - 10.1081/AMP-120018903
DO - 10.1081/AMP-120018903
M3 - Article
AN - SCOPUS:0038342115
SN - 1042-6914
VL - 18
SP - 169
EP - 180
JO - Materials and Manufacturing Processes
JF - Materials and Manufacturing Processes
IS - 2
ER -