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Strahlen mittels sphärischer Mikroproben aus Hochdurchsatzprozessen
Author(s) -
Kämmler J.,
Wielki N.,
Guba N.,
Ellendt N.,
Meyer D.
Publication year - 2019
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201800068
Subject(s) - shot peening , materials science , residual stress , peening , deformation (meteorology) , shot (pellet) , composite material , severe plastic deformation , particle (ecology) , yield (engineering) , plasticity , stress (linguistics) , metallurgy , microstructure , linguistics , oceanography , philosophy , geology
Mechanical surface treatment processes like shot peening induce plastic deformation in the near surface areas of the peened workpiece leading to changes in surface and subsurface properties, e. g. hardness alteration and generation of compressive residual stress. While changes of the processed part are desired because of the lifetime extending influence, changes of the shot material are normally neglected as it is chosen to be highly resistant. Within this work plastic deformation of the shot material X210Cr12 and AlSi12 is examined. By investigating the plastic deformation of the particles, an indirect analysis of material properties, e. g. the yield stress or the hardness, is possible. A consideration of the particle velocities also enables conclusions about the materials properties. Those properties are conventionally obtained in a material, time, and cost intensive way. Using the same jet pressure, the investigations show lower velocities and less pronounced plastic deformation for the X210Cr12 specimens. Due to their higher mass, the X210Cr12 particles of same diameter are accelerated slower and therefore reach a lower impact velocity compared to AlSi12 particles. Furthermore, the lower plastic deformation at identical velocities can be explained with the higher yield stress of the X210Cr12 particles.