Phase II Amount
$1,100,000
The objective of this project is to develop optimized process parameters for the cold spray process to test the fatigue life of a 5/16 inch through hole coupon and a divot coupon. A combination of finite element analysis (FEA) modeling and lab testing will be conducted to determine the loads necessary to achieve 10,000 cycles to failure for load ratios of R= -1 and R= 0.1, for both test coupon configurations. Where load ratio R is defined as the ratio of the minimum and maximum loads during the fatigue loading.
Benefit: Current efforts to repair 7075 Al using 7050 powder have shown reduced fatigue life versus leaving the sample unrepaired. This effort will develop a repair method that has equal or better fatigue life than the damaged part. The data and models generated will also aid in the development of structural repairs in the future.
Keywords: Nanoparticles, cold spray, repair, 7050, Aircraft, FEA, Fatigue , 7075
