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Table 8 Residual stress relaxation values

From: Residual Stress Relaxation of Thin-walled Long Stringer Made of Aluminum Alloy 7050-T7451 under Transportation Vibration

GroupDepth (μm)Sample numberNσ0.2 (MPa)\(\sigma_{re}^{10000}\) (MPa)K
a0 (Surface)310000449310.85
b0 (Surface)4430.95
c7.42 (Peak)2390.91
d7.42 (Peak)3671.02
e7.42 (Peak)4901.12