Control of porosity in weld beads was major objective in development of aluminum welding program. Porosity, most difficult defect to control, is caused by hydrogen gas unable to escape during solidification. Hard tooling allows hotter bead than free-fall tooling so hydrogen bubbles can boil out instead of forming pores. Welding position, moisture, and cleanliness are other important factors in control of porosity.
Technology of welding aluminum alloys-III
NASA Tech Briefs ; 2 , 4
1978-03-01
Miscellaneous
No indication
English
Technology of welding aluminum alloys-I
NTRS | 1978
|Technology of welding aluminum alloys-II
NTRS | 1978
Technology of welding aluminum alloys-IV
NTRS | 1978
|Resistance welding of aluminum alloys
Engineering Index Backfile | 1937
|FEATURES - Laser-welding aluminum alloys
Online Contents | 1999