Weldability of 2090 Al-Cu-Li alloy
The weldability of 2090 was studied along with the metallurgical changes associated with welding and aging. Autogenous bead-on-plate welds are produced using two different base metal tempers, as-received condition (T3) and peak-aged condition (T8) and two different welding processes, GTAW and EBW. The optimum aging condition is determined for the EB and GTA weldments. The results of weldability and aging studies indicate that the best aging temperature for the base metal and EB weldments is 160/sup 0/C, which results in a 75% joint efficiency and for the GTA weldment is 190/sup 0/C, which produces a 55% joint efficiency. Aging at 230/sup 0/C leads to a serious deterioration in the properties. The distribution of precipitates in the fusion zone appears to be the primary factor in controlling the weldment strength and elongation.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 7079705
- Report Number(s):
- LBL-25022; CONF-8804142-2; ON: DE88011963
- Country of Publication:
- United States
- Language:
- English
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