one of the more bizarre side effects has been surface pitting, and in extreme cases, delamination of the blade. pitting on a prop on a sub will actually trigger material failure, and that was one of the early problems for Collins due to a combination of materials science issues and blade design. Problem solved by the USN, ironically with the Swedes complaining about IP issues even though it was their engineering and design solution which caused the problem in the first place. go figure
the japanese are quite enthusiastic about developing carbon fibre or compound material solutions for both marine propellors and wind turbines blades as the pitting and/or delamination effect is reduced substantially.
there have been some mules made of pump jets and pods using carbon fibre blades but none in production because they're almost horrifically expensive.
one of the worst examples I have seen was in India, and eventually identified as a supply problem. ie they had a 3 bladed upwind turbine where 1 of the blades was sourced from another supplier - basically it was asking for trouble. At about 26rpm the blades ranaway due to controller failure, the mismatch in blade weight and dimensions triggered a significant oscilation problem.. end result, delamination, bearing failure, main shaft failure and blade strike. $3m worth of dead turbine.