Influence of Alloy and Solidification Parameters on Grain Refinement in Aluminum Weld Metal due to Inoculation
- BAM, Germany
- BIAS, Germany
- Los Alamos National Laboratory
The goals are: (1) Establish how much Ti/B grain refiner is need to completely refine aluminum weld metal for different alloys and different welding conditions; (2) Characterize how alloy composition and solidification parameters affect weld metal grain refinement; and (3) Apply relevant theory to understand observed behavior. Conclusions are: (1) additions of Ti/B grain refiner to weld metal in Alloys 1050, 5083, and 6082 resulted in significant grain refinement; (2) grain refinement was more effective in GTAW than LBW, resulting in finer grains at lower Ti content - reason is limited time available for equiaxed grain growth in LBW (inability to occlude columnar grain growth); (3) welding travel speed did not markedly affect grain size within GTAW and LBW clusters; and (4) application of Hunt CET analysis showed experimental G to be on the order of the critical G{sub CET}; G{sub CET} was consistently higher for GTAW than for LBW.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- BAM, Germany
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1044869
- Report Number(s):
- LA-UR-12-22557; TRN: US201214%%540
- Resource Relation:
- Conference: Trends in Welding Research ; 2012-06-04 - 2012-06-08 ; Chicago, Illinois, United States
- Country of Publication:
- United States
- Language:
- English
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