Influence of sulfide inclusions and pearlite content on the mechanical properties of hot-rolled carbon steels

Spitzig, W.A.; Sober, R. J.

doi:10.1007/bf02655201

Cited by 48 publications

(8 citation statements)

References 3 publications

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“…[17] On the other hand, a considerable amount of experimental work has demonstrated that neither the grain morphology nor the inclusions morphology significantly influences on the YS but fracture toughness and ductility. [18][19][20][21][22][23] It is worth mentioning the strong similarity between the present results on the variation of YS with test direction, Figure 6(b), and those previously reported for a normalized hot-rolled steel. [20] The variation of strain hardening exponent, n, with the orientation of the compression axis is shown in Figure 6(c).…”

Section: ½5supporting

confidence: 76%

Anisotropy in Mechanical Properties and Fracture Behavior of an Oxide Dispersion Fe20Cr5Al Alloy

Chao

Capdevila

2014

Metall Mater Trans A

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Anisotropy of fracture toughness and fracture behavior of Fe20Cr5Al oxide dispersionstrengthened alloy has been investigated by means of compression tests, hardness tests, and wedge splitting test. The results show a small effect of the compression direction on yield strength (YS) and strain hardening. The YS is minimum for longitudinal direction and maximum for the tangential direction. The transverse plastic strain ratio is similar for tangential and longitudinal directions but very different from that in normal direction. Hardness depends on the indentation plane; it is lower for any plane parallel to the L-T plane and of similar magnitude for the other orthogonal planes, i.e., the L-S and T-S planes. Macroscopically, two failure modes have been observed after wedge-splitting tests, those of LS and TS specimens in which fracture deviates along one or two branches normal to the notch plane, and those of LT, TL, SL, and ST specimens in which fracture propagates along the notch plane. Besides LT and TL specimens present delaminations parallel to L-T plane. Both, the fracture surface of branching cracks and that of the delaminations, show an intergranular brittle fracture appearance. It is proposed that the main cause of the delamination and crack branching is the alignment in the mesoscopic scale of the ultrafine grains structure which is enhanced by the h110i-texture of the material and by the presence in the grain boundaries of both yttria dispersoids and impurity contaminations. An elastoplastic finite element analysis was performed to study what stress state is the cause of the branches and delaminations. It is concluded that the normal to the crack branches and/or the shear stress components could determine the crack bifurcation mechanism, whereas the delamination it seems that it is controlled by the magnitude of the stress component normal to the delamination plane.

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Section: ½5supporting

confidence: 76%

Anisotropy in Mechanical Properties and Fracture Behavior of an Oxide Dispersion Fe20Cr5Al Alloy

Chao

Capdevila

2014

Metall Mater Trans A

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“…8 An increase in the vol% of sulfide inclusion stringers from 0.033 to 0.079 increased the DBTT by 79"F and reduced the USE by 77%. 7…”

Section: A Decisionmentioning

confidence: 99%

Measurement of the ductile to brittle transition temperature for waste tank cooling coils

Wiersma¹

1992

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“…Development of new free cutting steel is one of the most active research directions [1][2][3][4] due to the problems (such as environmental pollution, deterioration of mechanical properties) caused by lead, sulfur free cutting steel, [5][6][7][8][9] which are widely used throughout the world at present. BN free cutting steel, as an important new free cutting steel, has drew more and more attention because of its advantages in environmental protection and good mechanical properties, which will have a promising application prospect.…”

Section: Introductionmentioning

confidence: 99%

Precipitation and Growth Behaviors of BN Inclusions in Molten Steel

et al. 2014

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The existing form of BN particles, a new environmentally friendly free cutting particle, is very important in steel for the purpose of optimizing cutting performance. However, precipitation and growth behaviors of BN inclusions in steel are not very clear until now. In this research, the morphologies of BN inclusions in steel were discussed and the formation mechanisms of BN inclusions were proposed. First, the precipitation behaviors of BN inclusions in steel have been investigated by theoretical calculation using Factsage software. Then, the actual three-dimensional morphology of BN inclusions and composite inclusions were observed in laboratory. Moreover, Growth model of BN inclusions via diffusion and collision are established employing Matlab, respectively. The results revealed that BN precipitate greatly in the solidification end and BN can nucleate heterogeneously on the surface of nucleation site (such as Al2O3, spherical MnS) besides homogeneous nucleation. The size of the BN ranged from 1 to 2 um after the diffusion growth, and then BN particles and other particles in steel, relying on its own Brownian motion, collided and agglomerated with each other, thereby formed a large cluster-like inclusion. The results agreed well with the simulated results based on BN growth model.

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Influence of sulfide inclusions and pearlite content on the mechanical properties of hot-rolled carbon steels

Cited by 48 publications

References 3 publications

Anisotropy in Mechanical Properties and Fracture Behavior of an Oxide Dispersion Fe20Cr5Al Alloy

Anisotropy in Mechanical Properties and Fracture Behavior of an Oxide Dispersion Fe20Cr5Al Alloy

Measurement of the ductile to brittle transition temperature for waste tank cooling coils

Precipitation and Growth Behaviors of BN Inclusions in Molten Steel

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