A longitudinal crack and window opening type failure occurred in neutral zone that is applied to least plastic deformation in the bent TP347H tube during operation. From the analysis of residual stress and plastic deformation during the tube bending, there is low creep strength and high residual stress in neutral zone as compared other regions like intrados and extrados. Therefore, failure occurred in neutral zone due to stress relaxation concentrated in grain boundary during operation.

austenitic stainless steel tubes, creep strength, failure analysis, grain boundary, neutral zone crack, plastic deformation, residual stress analysis, stress relaxation, tube bending
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Copyright © 2016 ASM International. All rights reserved.
2016
ASM International
Topics
Grain boundaries Austenitic stainless steel Residual stress analysis Plastic deformation properties Creep strength
Issue Section:
Stainless Steels