Abstract
The residual stress was predicted through a model of the multi-pass girth weld joint using Finite Element Method (FEM). Coupled Thermo-Metallurgy-Mechanical (TMM) analysis was carried out and the predicted final residual stress was compared with experiment data. To study the role of aged martensite in final residual stress, two models were simulated and discussed: models with and without aged martensite (prime martensite only). Comparing the experiment data, the model with aged martensite has shown closer prediction while the one without the aged martensite has over predicted the residual stress.
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