Water-Droplet Impact-Characterization of Damage Mechanisms.
Abstract
The impact of a water drop on a solid surface produces a transient stress pulse which can damage the surface by plastic deformation and cracking. The consequence of this damage has important technological implications in diverse areas. Water droplet damage, like cavitation damage, is most typically characterized as an erosion process reflecting material removed with time. Indeed, measurements of material removal rates during repetitive impacting under standardized conditions are a common means of ranking materials for comparison of erosion resistance. However, the development of surface roughness (due to deformation or material removal) and damage in the surface layer during repetitive impacting greatly complicates a detailed analysis of individual impact events. In fact, qualitative descriptions of erosion show that several mechanisms may be involved at different times in the erosion process, leading to distinct stages. It is also clear that the conditions which will eventually lead to material removal are developed by sonic and subsonic droplets in the initial stage of erosion when the density of impacts is low.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA062492
Entities
People
- R. G. Hoagland
- R. G. Jung
Organizations
- Battelle Memorial Institute