Effects of Welding Speed and Welding Current on the Residual Stress and Deformation of SAF 2507/316L Dissimilar Plasma Arc Welding

Hong, Xiaolong; Huang, Bensheng; Li, Tianning; Chen, Peng; Zheng, Jianneng; Zhu, Yongyou

doi:10.1007/s11665-023-08969-0

Cited by 4 publications

(1 citation statement)

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“…A range of studies have been conducted to understand the influence of welding process parameters on mechanical properties, and thus the structural reliability of welded parts [13][14][15][16][17][18][19][20]. Ferro et al [21] conducted FE simulations to examine the influence of different heat source models on thermal profiles in welding.…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Study of Thermal Profiles and Residual Stress in Welding

Han

2024

Materials

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One of the effects of welding is residual stress. Welding involves complex tests concerning differences in values of the mechanical parameters of its regions as an effect of residual stress. Such multiphysics characteristics of welding pose a challenge in predicting residual stress. In the present study, a thermo-mechanical constitutive model considering phase transformation and transformation plasticity is implemented in the numerical model in ABAQUS user subroutines. In order to consider phase evolution in welding, the metallurgical parameters for Leblond’s phase equation were obtained from the calibration of DH36 steel with a CCT diagram. In addition, the effects of welding speed on thermal profiles and residual stress generation were investigated. Analysis has suggested that the width of the heat-affected zone (HAZ) decreases with an increase in welding speed, and the phase fraction is significantly affected by this kind of parameter. Such phase transformation has led to the generation of a compressive stress in the fusion zone (FZ) and HAZ. The volume difference between coexisting phases produces a compressive stress in cooling, and its magnitude was increased with martensite increasing.

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