An analysis of stress waves in 12Cr steel, Stellite 6B and TiN by liquid impact loading

摘要

this research placed emphasis on the computer simulated stress distribution on the surface and in the bulk of the materials which are subjected to the water impact causing erosion damage. The erosion damage was predicted by evaluating the spatial and temporal stress wave distribution generated by water impact pressure on 12Cr steel and Stellite 6B as steam turbine materials and TiN as a hard coating material. There were two distinctive stress wave Behaviors. Firstly, the large tensile stress at the surface was developed by the Rayleigh wave component which Appeared between the water drop and the Rayleigh wave front.