TY - JOUR
T1 - Neutron diffraction measurements of residual strains in offshore welds
AU - Lorentzen, T.
AU - Ibsø, J.B.
PY - 1995
Y1 - 1995
N2 - Residual stresses in an offshore weld may affect the fatigue life of the structure, and should hence be included in calculations of fatigue crack propagation and fatigue lives. In the present investigation neutron diffraction is used as a non-destructive technique for the evaluation of through thickness variations of residual strains in welded test samples of steel plates. The neutron diffraction strain measurements show relatively high residual strains reaching + 1 × 10-3 near the outer surfaces and -4 × 10-4 near the centre of the plates. A simplified strain/stress conversion indicates that the highest residual stress exceeds approximately 50% of the material yield stress of σy ≈ 400 MPa.
AB - Residual stresses in an offshore weld may affect the fatigue life of the structure, and should hence be included in calculations of fatigue crack propagation and fatigue lives. In the present investigation neutron diffraction is used as a non-destructive technique for the evaluation of through thickness variations of residual strains in welded test samples of steel plates. The neutron diffraction strain measurements show relatively high residual strains reaching + 1 × 10-3 near the outer surfaces and -4 × 10-4 near the centre of the plates. A simplified strain/stress conversion indicates that the highest residual stress exceeds approximately 50% of the material yield stress of σy ≈ 400 MPa.
KW - Strukturelle materialer
U2 - 10.1016/0921-5093(94)09752-6
DO - 10.1016/0921-5093(94)09752-6
M3 - Journal article
SN - 0921-5093
VL - 197
SP - 209
EP - 214
JO - Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing
JF - Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing
ER -