Microstructure Evolution, Structural Integrity, and Hot Corrosion Performance of Nitrogen-Enhanced Stainless Steel Welds

Mehta, Ninad Hemant; Shukla, Satyam; Parameswar, Prateek; Surya, V. Jaya; Bharadwaj, Rishabh; Nikam, Pranav; Chen, Xizhang

doi:10.1007/s11665-019-04290-x

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…As in Figure 3, the Laves precipitated in the interdendritic regions will have a major influence on the mechanical strength of the deposits. [ 38 ] Compared to a greater abundance of Laves phase and coarsely interconnected morphology, attributes like ductility, toughness, strength, and so forth, will be less negatively impacted by a fine, randomly distributed Laves phase. [ 39 ]…”

Section: Resultsmentioning

confidence: 99%

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

Nachimuthu,

Gosipathala,

Arasappan

et al. 2024

Materials & Corrosion

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In elevated conditions, austenitic stainless steels suffer intense damage by corrosion because of the severe oxide scale development. Giving stainless steel a corrosion‐resistant surface coating can prevent excessive damage. In this case, welding‐based overlaying is a potential method to restore the damaged parts as it has a higher productivity rate. This investigation articulates the corrosion resistance behavior of the multiple overlapped Inconel 625 (IN625) weld overlays on the AISI 316L substrate plate. The corrosion resistance at elevated temperatures was investigated with kinetic curves, further revealing the corrosion products from the sample surface. Characterization techniques like scanning electron microscopy with energy‐dispersive spectroscopy, X‐ray diffraction, and Raman spectroscopy were employed to analyze the corrosion products. Hot corrosion kinetics in the molten salt environment (Na2SO4 + V2O5) revealed that the IN625 overlay samples gained a weight of 40.15 mg/cm2, and the substrate had a weight gain of 65.42 mg/cm2. From the hot oxidation kinetics, it is evident that the mass gained by the substrate is more than twice that of the Inconel overlay sample. Furthermore, the formation of oxides and spinel phases rich in nickel (NiO, NiCr2O4) highly influenced the corrosion kinetics of the multiple overlapped IN625 overlay sample. The AISI 316L substrate sample revealed the existence of critical oxide phases such as Fe2O3 and Cr2O3, which were lesser and did not influence the corrosion resistance at 900°C. In the present investigation, the multiple overlapped IN625 weld overlay offered excellent corrosion resistance at high temperature compared to the AISI 316L.

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Section: Resultsmentioning

confidence: 99%

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

Nachimuthu,

Gosipathala,

Arasappan

et al. 2024

Materials & Corrosion

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Systematic oxidation studies of dissimilar ferritic/austenitic welded joints

Mittal¹,

Sidhu

2021

Materials at High Temperatures

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Weldability of high nitrogen steels: A review

Wang

Tian

et al. 2023

Reviews on Advanced Materials Science

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High nitrogen steel (HNS) have been widely used in many industrial fields in place of stainless steels. As we know, the welding is the main fabricating method of the HNS structural components. In this article, the recent investigations of joining methods of HNS, such as tungsten inert gas welding, melt inert-gas welding, laser welding, laser-arc hybrid welding, friction stir welding (FSW), and brazing method are summarized. First, the effect of nitrogen content in shielding gas, welding wire, and base metal on the evolution of microstructure, mechanical properties, and corrosion susceptibility of fusion welded joints are discussed systemically. Then the existing problem during FSW and brazing process of HNS are analyzed. Additionally, the key issues and future trends in the joining of HNS are proposed. The main purpose of this review is to provide a technical reference and theoretical basis for research and technological development during the welding of HNS.

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Microstructure Evolution, Structural Integrity, and Hot Corrosion Performance of Nitrogen-Enhanced Stainless Steel Welds

Cited by 4 publications

References 18 publications

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

Systematic oxidation studies of dissimilar ferritic/austenitic welded joints

Weldability of high nitrogen steels: A review

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