A Study on Microstructure, Residual Stresses and Stress Corrosion Cracking of Repair Welding on 304 Stainless Steel: Part I-Effects of Heat Input

Luo, Yun; Gu, Wenbin; Peng, Wei; Jin, Qiang; Qin, Qingliang; Yi, Chun-Mei

doi:10.3390/ma13102416

Cited by 27 publications

(17 citation statements)

References 50 publications

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“…The residual stress distribution over the weld-joint was obtained using the simulation and validated using available previous experimental work [20] as shown in Figure 3. There is good agreement between the measured and numerical results.…”

Section: Residual Stress Distributionmentioning

confidence: 99%

Residual stress effects on fatigue crack propagation in Butt–Welded joints for 304 stainless steel sheets

et al. 2021

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Welded joints are sensitive to fatigue failure due to cyclic loading, as well as fatigue crack propagation influenced by the distribution of welding residual stress. In this study, the fatigue crack propagation rates in butt-welded joints for 304 stainless steel sheets were evaluated in the presence of welding residual stresses. The analysis consisted of two separate models: first, a 3D-finite element (FE) model was used to predict the residual stresses due to welding; second, a numerical study was undertaken to predict fatigue crack propagation in the presence and absence of residual stress using the extended finite element method (XFEM). The crack growth model (NASGRO) and available experimental data were applied to verify the simulation results. The XFEM without residual stress effects shows good agreement with the experimental data and the NASGRO model. However, in the presence of residual stress, the simulation results show less agreement with the NASGRO model. The level and the nature of residual stress have significant effects on crack growth. A faster crack propagation rate is recognized due to the effect of tensile residual stress at the crack tip, while a higher resistance to crack growth is developed due to a compressive residual stress field.

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Section: Residual Stress Distributionmentioning

confidence: 99%

Residual stress effects on fatigue crack propagation in Butt–Welded joints for 304 stainless steel sheets

et al. 2021

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“…It is critical to regulate the material properties, process parameters, and residual stress induced by welding to prevent intergranular stress corrosion cracking surrounding the weldments. 6,10…”

Section: Introductionmentioning

confidence: 99%

Residual stresses study in butt welded joint of Inconel 617 alloy and effect of post weld heat treatment on residual stresses

Kumar

Dey

Pradhan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Distribution of weld-induced residual stress plays a significant effect on the service life of a welded component. The accumulation of high residual stress accelerates the crack propagation even if the crack is of microscopic level, reducing the service life of the welded component. Prior understanding of residual stress distribution can aid in the design of a component with an adequate factor of safety and reduce the probability of failure. In the present study, two separate circumferential butt welded pipes were fabricated using Alloy 617 and then subjected to post weld heat treatment) at 720°C and 980°C. The deep hole drilling method was used to measure the distribution of residual stress. The fabrication of the welded joint was done using the hot-wire TIG welding process. High welding speeds are possible with hot-wire tungsten inert gas (TIG) welding because it uses less heat than conventional TIG welding. Using hot-wire TIG welding, the welded joint's mechanical properties, such as hardness, are improved in addition to its metallurgical properties. The computational approach is provided to analyze temperature and residual stress fields in multi-pass TIG welds with different passes. Based on ABAQUS FEA software, a coupled thermomechanical computational approach was developed to analyze the residual stress distribution on the welded joint. A 3D finite element model for Alloy 617 tube was created to estimate the welding stress field in two separate multi-pass welded joints. Mixed hardening model (kinematic and isotropic) was used during the numerical analysis. The effectiveness of the computational approach was verified with experimental measurements. The magnitude of hoop and axial residual stresses were observed to be maximum at a depth of 6 mm from the upper surface. The stress gradient in the welded zone and heat-affected zone is dramatically reduced by 70–80% of the as-welded condition during the post weld heat treatment at 980°C.

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“…In the manufacture of products using the method of multilayer build-up welding, metals with good weldability including steels [26][27][28][29], alloys based on Al [21,30], Ti [25,[31][32][33] and Ni [34] can potentially be used. Martensitic and austenitic stainless steels are also successfully used for additive manufacturing of parts due to their outstanding mechanical properties and high corrosion resistance [35].…”

Section: Introductionmentioning

confidence: 99%

Formation of the Structure and Properties of Deposited Multilayer Specimens from Austenitic Steel under Various Heat Removal Conditions

Chinakhov

Akimov

2022

Metals

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The effect of side limiters (shaping blocks) on the formation of the structure and hardness of AISI 308LSi stainless steel workpieces obtained by multilayer build-up welding in an argon environment has been studied. The studies were carried out on specimens deposited using graphite limiters, copper limiters and without limiters. As a result of numerical simulation, it was found that the lowest temperatures of the specimen metal are observed when using copper limiters, and the highest when using graphite limiters (different thermal conductivity of materials) in comparison with the temperatures of the specimen obtained without limiters. With the use of graphite limiters, most of the specimen’s metal is in the temperature range of austenite formation (45%) and a more uniform growth of structural elements is observed, without sharp transitions between the deposited layers, in contrast to the other two types of specimens. The high value of the thermal conductivity of copper leads to an increase in the difference in the size of the dendrites between the central and peripheral side parts of the deposited specimen. The highest values of hardness are observed in the specimen obtained using graphite blocks, due to the more active diffusion of δ-ferrite into austenite by an average of 12%, compared with the other investigated specimens, despite the overall increase in size dendrites. The technology of electric arc multilayer build-up welding with the use of shaping graphite blocks makes it possible to produce a workpiece with a uniform structure and properties. The above makes it a promising direction in electric arc additive manufacturing.

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A Study on Microstructure, Residual Stresses and Stress Corrosion Cracking of Repair Welding on 304 Stainless Steel: Part I-Effects of Heat Input

Cited by 27 publications

References 50 publications

Residual stress effects on fatigue crack propagation in Butt–Welded joints for 304 stainless steel sheets

Residual stress effects on fatigue crack propagation in Butt–Welded joints for 304 stainless steel sheets

Residual stresses study in butt welded joint of Inconel 617 alloy and effect of post weld heat treatment on residual stresses

Formation of the Structure and Properties of Deposited Multilayer Specimens from Austenitic Steel under Various Heat Removal Conditions

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