Efficient estimation of thermophysical parameters for LF6 aluminium alloy

The LF6 aluminium alloy is widely used in the aerospace industry, owing to its good corrosion resistance and excellent weld ability. However, its thermophysical parameters, especially in high temperature, have been hardly determined under the general project condition, which have great influence on the accuracy of engineering computation. In the present paper, the optimal annealing temperature of LF6 aluminium alloy was confirmed. Based on the recovery at optimal annealing temperature and the limit annealing temperature respectively, the finite element model was built, and the thermophysical parameters were estimated with the probability design system in ANSYS. The results indicate that, the obtained thermophysical parameters values tally with the project reality. The use of the probability design system has provided one of the phenomenological methods for the solution of the unknown thermophysical parameters, and it is possible to build the corresponding material properties database furthermore.