Effect of microstructural heterogeneities on variability in low-temperature impact toughness in multi-pass weld metal of 420 MPa offshore engineering steel

Nellikode, Savyasachi; Manladan, Sunusi Marwana; Jo, Ilguk; Jung, Seung-Jin; Kim, In-Chan; Park, Hyungkwon; Nam, Dae-Geun; Park, Yeong-Do

doi:10.1007/s40194-023-01521-7

Cited by 6 publications

(1 citation statement)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The heterogeneity of the microstructure formed in the weld metal arises from the diverse properties and distributions of the constituent phases, combined with the irregular dendritic structure [11,12]. Previous research has demonstrated that the microstructural heterogeneity of weld metal exerts a substantial impact on its mechanical properties [11][12][13][14]. For examples, Zhang et al [14] conducted a finite element study based on micromechanics to examine the influence of microstructure heterogeneity on the tensile properties of C-Mn weld metal.…”

Section: Introductionmentioning

confidence: 99%

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Zhou,

Wu,

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

The cryogenic fracture toughness of the SA645/304L dissimilar weld, produced using continuous wave IPG fiber laser welding with a 0.3 mm beam offset towards the 304L side, and the microstructural effects on the fracture behavior were systematically investigated. The weld metal consists of ∼89% columnar dendritic martensite and ∼11% retained austenite (RA), where the ununiform distribution of constituent phases as well as the distinctions between martensite and RA in terms of morphology and mechanical properties lead to the microstructure heterogeneity of weld metal. Pop-in phenomenon appears on the Force-Displacement (F-V) curve during the crack tip opening displacement (CTOD) test for the weld. The CTOD value for the weld is ∼0.057 mm, about 8 times less than that when pop-in effect is ignored (∼0.563 mm). Rapid propagation of the pre-fatigue crack tip along the center of the weld leads to the pop-in phenomenon. Fracture surface in pre-fatigue crack tip (PCT) region shows quasi-cleavage features, while fracture surface in stable crack propagation (SCP) region presents a ductile-fractured surface with dimples. The crack propagation path in SCP region is frequently deflected. Inhibition effect of grain boundaries on crack propagation and TRIP effect of retained austenite (RA) result in the improvement in fracture toughness of the SCP region.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Zhou,

Wu,

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

Exploring the trends in flux-cored arc welding: scientometric analysis approach

Świerczyńska,

Varbai,

Pandey

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Flux-cored arc welding (FCAW) is a universal group of welding methods in terms of the scope of application and automation possibilities, the share of which in various industries in many countries is still increasing. The paper presents the results of bibliographic analyses (scientometric analysis with the use of VOSviewer, Bibliometrix and CitNetExplorer tools) of a data set of 993 publications indexed in the Web of Science database on the subject of FCAW for all types of flux-cored wires. An objective and unbiased approach to analysis resulted in a relatively neutral assessment of the state of knowledge in the field of FCAW and allowed for the identification of research directions carried out in the world, the dynamics of their changes as well as research gaps and needs. The scientometric analysis approach provided a holistic picture of the development of FCAW over the last 58 years, pointing to the geographical areas where this process has been and is most intensively researched, the agencies funding this research, the most active research teams, as well as the journals that have most often published articles on this topic. The most current research directions in relation to FCAW include underwater welding, hardfacing and cladding purposes, health and safety issues, and more general topic: properties and weldability of ferrous alloys. However, among the most urgent research needs the following topics: fatigue analysis of welded joints, environmental degradation of flux-cored wires, properties and weldability of nickel alloys, development of hybrid and combined welding procedures can be listed.

show abstract

Physical simulation-based analysis of multipass welding in S500 shipbuilding steel

Gáspár,

Kovács,

Sainio

et al. 2024

Weld World

View full text Add to dashboard Cite

Novel generations of shipbuilding steels have outstanding toughness due to the improved steel producing processes. Their microstructure mainly consists of ferrite and bainite, while the presence of acicular ferrite has a role in high impact energy of the welded joint. This research aims to analyze the effect of multipass welding on weld characteristics of S500 shipbuilding steel. A Gleeble 3500 simulator machine is used to produce the welding thermal cycles by the Rykalin-3D model on 70 $$\times$$ × 10 $$\times$$ × 10 mm samples manufactured in transversal direction from a submerged arc welded joint of 16 mm plate. Temperatures for the simulations were set at 1350 °C for the coarse-grained zone forming in the weld metal (CGHAZ-W), 815 °C for the intercritical zone (ICHAZ-W), and a combination of these peak temperatures for the intercritically reheated coarse-grained zone (ICCGHAZ-W). The examined t8/5 interval was 5–30 s. The weld properties were examined by microstructural examination, hardness test, and instrumented Charpy V-notch impact toughness test. The impact energy values of subzones were below the unaffected weld metal. Longer cooling time resulted in lower impact energy in ICHAZ-W. However, this tendency was not observed in CGHAZ-W. ICHAZ-W and ICCGHAZ-W resulted in the lowest impact toughness, which was indicated by the large unstable crack propagation.

show abstract

Effect of microstructural heterogeneities on variability in low-temperature impact toughness in multi-pass weld metal of 420 MPa offshore engineering steel

Cited by 6 publications

References 39 publications

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Exploring the trends in flux-cored arc welding: scientometric analysis approach

Physical simulation-based analysis of multipass welding in S500 shipbuilding steel

Contact Info

Product

Resources

About