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Title: Improvement Of Ni 18 (250) Maraging Steel Weldment Fatigue Strength Through Shot Peening
Author: Banas, G. and Lawrence,Jr., F.V.
Source: Conf Proc: ICSP-3, (p.675-680)
Publication year 1987
Document number: 1987045
Number of pages: 6
Abstract:
The low fatigue strength of weldments limits the design stresses of welded components. Fortunately, the fatigue strength of weldments can be substantially increased by shot
peening and by other post-weld treatments which alter the severity of the critical notch, increase the notch root material's fatigue resistance (strength), or induce
favorable residual stresses at the notch root.
T
his study investigated the effects of various shot peening treatments
on the fatigue resistance of groove weldments in thin gauge (3 mm) sheets of a maraging steel fatigued under reversed bending. The results of the experiments were compared
with two analytical models for the fatigue strength of weldments. Comparison of theory with experiment lead to the conclusion that not all shot peening treatments cause
substantial improvements in the fatigue resistance of weldments.
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