Microstructural study and mechanical properties of TIG welded Inconel 617 superalloy

Mandal, P.K.; Saji, Amal Michael; Lalu, Akash Kurian; Krishnan, Akshay; Nair, Aswin S.; Jacob, Manu M.

doi:10.1016/j.matpr.2022.04.400

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…The twin plates have ordered structure in γ matrix, and these have a good effect on strength of superalloy. 38 An equiaxed austenitic microstructure in weld metal with uniform distribution of the carbide phases within the matrix is witnessed in Figure 15(d). Kumar et al 39 also observed the similar effect of the PWHT on microstructure of the In617 filler weld metal.…”

Section: Materials Characterizationmentioning

confidence: 96%

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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Section: Materials Characterizationmentioning

confidence: 96%

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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“…Ni-based alloy Inconel: 200 [443], 600 [444,445], 617 [446], 625 [447][448][449], 690 [450], 800 [451], 800H [452][453][454] Hastelloy C276 [455], C22 [456,457], X [458] Fatigue, surface roughness, machinability, durability, impact toughness, microhardness, and tensile strength In all energy sectors Other alloys HEA [459] W-based alloys [460] Cu-based alloys [461] Ti-based alloys Ti6Al4V [451,462] Microhardness, compressive strength, and plasticity…”

Section: Effect Of Cryogenic Treatments On Metallic Materials Potenit...mentioning

confidence: 99%

Sustainable New Technology for the Improvement of Metallic Materials for Future Energy Applications

Jovičević-Klug,

Rohwerder

2023

Coatings

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The need for a more sustainable and accessible source of energy is increasing as human society advances. The use of different metallic materials and their challenges in current and future energy sectors are the primary focus of the first part of this review. Cryogenic treatment (CT), one of the possible solutions for an environmentally friendly, sustainable, and cost-effective technology for tailoring the properties of these materials, is the focus of second part of the review. CT was found to have great potential for the improvement of the properties of metallic materials and the extension of their service life. The focus of the review is on selected surface properties and corrosion resistance, which are under-researched and have great potential for future research and application of CT in the energy sector. Most research reports that CT improves corrosion resistance by up to 90%. This is based on the unique oxide formation that can provide corrosion protection and extend the life of metallic materials by up to three times. However, more research should be conducted on the surface resistance and corrosion resistance of metallic materials in future studies to provide standards for the application of CT in the energy sector.

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“…Thus, elongated grains were observed from the weld. Mandal et al [20] reported that Inconel 617 has the capacity to strengthen other alloys for application in high-temperature zones. This is due to superior mechanical properties and creep-rupture strength.…”

Section: Microstructural Properties Mechanical Strength Of Tig Weldingmentioning

confidence: 99%

Microstructural and Strengthening properties of TIG and MIG welding- An Overview

et al. 2023

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The study focused on the standalone TIG and MIG welding and the combined effect, emphasizing the microstructural properties and strength of the welded joint, especially the heat-affected zone. The literature study revealed that both welding techniques and their combination have full penetration in terms of the weld, and the HAZ for TIG-MIG has a larger width in comparison with TIG and MIG. TIG-MIG joints usually demonstrate ductile fracture compared with standalone MIG or TIG welded joints. However, it is characterized by adequate properties like tensile strength compared with the TIG and MIG welding processes. In addition, a comparison between the TIG-MIG techniques and the traditional MIG welding revealed a refined appearance in the joint, as revealed by several microstructures of the joints.

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Microstructural study and mechanical properties of TIG welded Inconel 617 superalloy

Cited by 5 publications

References 29 publications

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

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

Sustainable New Technology for the Improvement of Metallic Materials for Future Energy Applications

Microstructural and Strengthening properties of TIG and MIG welding- An Overview

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