Effect of MnS inclusion and crystallographic texture on anisotropy in Charpy impact toughness of low carbon ferritic steel

Ghosh, Abhijit; Modak, Pranabananda; Dutta, R. K.; Chakrabarti, Debalay

doi:10.1016/j.msea.2015.12.047

Cited by 72 publications

(25 citation statements)

References 31 publications

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“…On the other hand, the increase of large‐angle grain boundary ratio can refine the grain size. Therefore large‐angle grain boundaries can effectively reduce or prevent cleavage crack propagation, however small‐angle grain boundaries have no such effect …”

Section: Resultsmentioning

confidence: 99%

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Han

Wang

et al. 2019

steel research int.

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The temperature drop curves of an ultra-heavy plate with a thickness of 137 mm after quenching are measured at different positions using a jet quenching equipment and a multi-channel steel plate temperature recorder. The effect of the jet impact (Z1), intersection interference (Z2), and transverse flow (Z3) heat transfer zones on the temperature gradient of an ultra-heavy steel plate during jet quenching was investigated. The corresponding relationships and interaction mechanisms between cooling rate, microstructure, and mechanical properties during jet quenching are studied. The results indicate that Z2 and Z3 had a greater influence on temperature gradient and microstructure evolution, and Z1 and Z2 had a greater influence on the cooling rate and mechanical properties. The experimental results have guiding significance for the development of new quenching equipment for ultra-heavy steel plates and their industrial application.

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Section: Resultsmentioning

confidence: 99%

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Han

Wang

et al. 2019

steel research int.

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“…According to the LAGB content, the steel was subjected to a small amount of intercritical deformation, as well as a low finish rolling temperature. Hence, due to its high stacking fault energy, deformed ferrite grains were found in the recovered state, thereby increasing the density and fraction of LAGB …”

Section: Resultsmentioning

confidence: 99%

Effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 STEEL

Zúñiga

González-Velázquez

Rivas-López

et al. 2018

Fatigue Fract Eng Mat Struct

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The combined effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 steel was studied. The steel exhibited microstructural banding along the 0° direction and near random texture in the material. The mechanical properties were characterized by the use of tensile and impact toughness samples oriented along the rolling direction (0°, 45°, and 90°). For impact toughness, anisotropic behavior was observed, where the 0° oriented samples showed lower impact toughness than the 90° and 45° directions, with differences of 25% and 31%, respectively, while the yield strength (YS) showed the lowest values in the 0° oriented samples. The relative variation coefficient (rrv) indicates significant correlation between microstructure, texture, and toughness anisotropy. It was observed that the banding degree and the amount of {110} and {111} oriented grains are directly related to the degree of anisotropy, which high values are the cause of lower mechanical properties.

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“…Segregation is present on both geometries, but its configuration is different in each case, as for L-T geometry, segregation is transverse to the rolling plane while for T-L, segregation is coincident to the rolling plane as shown in Figure 14. Banded regions and the presence of aligned microphases and non-metallic inclusions, such as MnS, create an easy path for crack propagation, influencing toughness according to their volume, morphology and distribution [5,15]. Ferrite resists the crack propagation better than bands composed of secondary phases and constituents, which act as brittle sites for crack initiation or as a concentrated stress spot, an easy path for the crack propagation [22].…”

Section: Discussionmentioning

confidence: 99%

“…Fracture toughness and how crack propagation occurs in steels, depend on their chemical composition [4,5,[11][12][13], resultant microstructures [4,5,[10][11][12]14], inclusions [4,5,11,12], grain morphology, e.g., pancaked or elongated [4,12], crystallographic textures [4,5,[10][11][12][13][14] and residual stresses produced after the TMCP process [15]. Moreover, many studies in the literature point out the crystallographic orientation as the major cause of delamination, i.e., the presence of 001 plane more specifically [5,8,11,[15][16][17][18]. Most of the literature presents impact toughness results from Charpy tests.…”

Section: Introductionmentioning

confidence: 99%

Effect of Textures and Microstructures on the Occurrence of Delamination during and after Fracture Toughness Tests of API X80 Steel Plates

Conde¹,

Pinto²,

Masoumi³

et al. 2020

Strength of Materials

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The API 5 L X80 is a high strength microalloyed steel, widely used in the gas and oil industry to fabricate pipelines. This steel presents a combination of elevated strength and toughness. In the present investigation, the microstructural features, fracture toughness and delamination occurrence of two X80 grade steel plates with different processing routes and chemical composition were studied. The first steel depicted a homogenous bainitic matrix and the second steel exhibited a banded microstructure composed of elongated ferrite grains, with macrosegregation in the mid-plane of the plates. Fracture toughness tests were conducted for both steels on 7-mm and 15-mm thick samples. The orientation distribution functions analysis revealed crystallographic intensity distribution of the austenite to ferrite transformation texture, especially the alpha-fiber (< 011 > || rolling direction) which explained the anisotropy and delamination occurrences. Both processed plates of steel presented the alpha-fiber due to hot-rolling of plates. Delaminations occurrences were further investigated and attributed to a strong {100} <011> orientation presence despite microstructure homogeneity. A schematic model was proposed, showing the source of delamination and the reason for the lowest toughness for 45° to the rolling direction.

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Effect of MnS inclusion and crystallographic texture on anisotropy in Charpy impact toughness of low carbon ferritic steel

Cited by 72 publications

References 31 publications

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 STEEL

Effect of Textures and Microstructures on the Occurrence of Delamination during and after Fracture Toughness Tests of API X80 Steel Plates

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