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Title: Influence Of Shot Peening With Diff.peen.mater.on Stress Corr.and Corr.fat.behavior Of Weld.a1znmg
Author: Koehler, W.
Source: Conf Proc: ICSP-2, (p.126-132)
Publication year 1984
Document number: 1984036
Number of pages: 7
Abstract:
Using the alloy A1Zn4.5Mg2 as an example, the influence of shot peening on the stress corrosion resistance and corrosion fatigue behavior was investigated.
W
elded tensile test samples of the alloy were
shot peened with glass, steel and ceramic beads as well as granulated Aluminium material. The samples were tested in 2% and 3.5% NaC1-solution for stress corrosion
resistance. With glass, steel and Granal, a significant improvement of life over 60 days without fracture was achieved in these tests.
F
urthermore, a significant improvement of the
corrosion fatigue behavior in 2% NaC1 was achieved. For better understanding the mechanism involved, the residual compressive stresses were measured by X-ray methods. The
individual results of the stress and fatigue corrosion tests and the effect of peening will be discussed.
Descriptors: A1ZnMg-alloys; Stress corrosion; Corrosion fatigue; Shot peening; Residual stress
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