焊接道间温度对双相不锈钢热历史和组织影响的数值预测

IF 1.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research-ibero-american Journal of Materials Pub Date : 2023-05-19 DOI:10.1590/1980-5373-mr-2022-0529
C. R. Xavier, Horácio Guimarães Delgado Junior, Matheus Gomes Rebello, Raí Ramos Lisbôa, Ana Carolina Martins Silva, J. A. Castro
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Numerical Prediction for the Effects of Welding Interpass Temperature on the Thermal History and Microstructure of Duplex Stainless Steels
Numerical simulation was used to predict the thermal behavior and the resulting microstructure at the heat-affected zone (HAZ) of a 170 mm diameter and 3.5 mm thickness super duplex stainless steel (SDSS) UNS S32750 tube. In order to evaluate the thermal response from the model, a usual welding situation involving interpass temperature (IT) and its influence on the HAZ microstructure was exploited. Thus, two superimposed autogenous welding passes were simulated, the first clockwise with the tube in the room temperature and the second, counterclockwise, with the tube at the temperature of 250 o C. Even subjected to successive thermal cycles and high interpass temperature, the proportion and morphology of the phases at the HAZ and Fusion Zone (FZ) did not present significant differences when comparing the two welding passes. Meanwhile, nitrogen losses should be avoided during welding in order to obtain a balanced microstructure in DSS welds, contributing to guarantee satisfactory toughness in addition to resistance to pitting corrosion. The predictions from the simulation were validated by using experimental results obtained from the autogenous TIG (Tungsten Inert Gas) process.
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来源期刊
Materials Research-ibero-american Journal of Materials
Materials Research-ibero-american Journal of Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
11.80%
发文量
161
审稿时长
3 months
期刊介绍: Information not localized
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