Dendrite Morphology and Solute Redistribution during Solidification of 25Cr-20Ni Austenitic Stainless Steel

Umeda, T.; Matsuyama, Syunya; Murayama, Hirokazu; Sugiyama, Masataka

doi:10.2355/tetsutohagane1955.63.3_441

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…The tensile strength appeared at the fraction solid of 0.8 for both d phase and g phase, and this result was in the range of Shin et al 8) and previous studies. [15][16][17] It seems that the dendrites begin to combine mutually at the fraction solid of 0.8 32) because the tensile strength does not appear until the fraction solid of 0.8 in this experimental result, and the tensile strength also increases so that the combined region of dendrites may increase with increasing the fraction solid after dendrites combine mutually. Though the tensile strength increased as the fraction solid increased for both the d phase and g phase, the tensile strength changed with the phase state.…”

Section: Tensile Strength and Elongation During Solidificationmentioning

confidence: 62%

High Temperature Deformation Behavior of Peritectic Carbon Steel during Solidification.

Mizukami¹,

Yamanaka²,

Watanabe³

2002

ISIJ International

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Phase dependence of tensile strength of Fe-C binary steel and peritectic carbon steel during and after solidification has been studied by a technique for high temperature tensile testing. The experimental technique enabled a sample to melt and solidify without a crucible, and the measurement of a minute load in a solidification temperature range became possible. A numerical model for the analysis of phase transformation during and after solidification was developed with the assumption that local equilibrium holds at liquid/solid interface or d/g phase interface.The zero strength temperature was in agreement with zero ductility temperature, and both of these temperatures appeared at the fraction solid of 0.8. Both the tensile strength and elongation of Fe-C binary steel were dependent on the phase state but not on carbon contents. The strain which seems to cause cracks in continuously cast steel slabs for the peritectic carbon steel is predicted to be generated during solidification.

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Section: Tensile Strength and Elongation During Solidificationmentioning

confidence: 62%

High Temperature Deformation Behavior of Peritectic Carbon Steel during Solidification.

Mizukami¹,

Yamanaka²,

Watanabe³

2002

ISIJ International

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“…First, the plate-like dendrite structure tends to evolve by joining the secondary dendrite arms that branched off from the neighboring primary arms. 24,27,30) Furthermore, some tertiary arms branched off from the secondary arms in the 0.20P (Fig. 7(c)).…”

Section: Primary Solidification Structure (D D Dendrite)mentioning

confidence: 99%

Influence of Phosphorus on Solidification Structure in Continuously Cast 0.1 mass% Carbon Steel.

2003

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In 0.1 mass% carbon steels with phosphorus contents ranging from 0.01 to 0.2 mass%, slabs were continuously cast to a thickness of 100 mm with a laboratory scale caster. Their macro-and micro-structures were characterized, focusing on the effects of phosphorus addition on the structural evolution during solidification and subsequent cooling. Cast slabs of high phosphorus steels have a fine columnar-g-grain structure. The mean width of the columnar grain was approximately half of that in the cast slabs without the phosphorus addition. Dispersed globular a grains were observed in the a grain structure of high phosphorus steels. The globular grains evolved at the phosphorus-rich spots in the prior-g grain. The micro-segregation of phosphorus results in these structural evolutions. Since the phosphorus enrichment stabilizes bcc (d or a) phase locally at the inter-dendritic region, the phosphorus-rich spot makes d phase retained to lower temperature for the d/g transformation, and provides a predominant site for the g/a transformation. In the high phosphorus casts, therefore, the dispersed d phase are thought to pin the g grain growth more effectively in the dϩg region when the completion of the d/g transformation is remarkably suppressed by the phosphorus segregation.

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“…5, the ratio of d/g transformation depended on the carbon concentration. By the way, it is thought that the solidification shrinkage, that is, density change will not influence the dynamic behavior of solidified shell until fraction of solid 0.8 the same as tensile strength and elongation 18) where dendrites form a network 19) during solidification. Therefore, the density change was investigated over fraction of solid 0.8.…”

Section: Change In Density During Solidificationmentioning

confidence: 99%

Prediction of Density of Carbon Steels.

Mizukami¹,

Yamanaka²,

Watanabe³

2002

ISIJ International

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The change in the density of carbon steel with phase at a temperature range from 1 000 to 1 973 K has been studied by a sessile drop profile method. Measurement of the density by a sessile drop profile method has to be carried out under heating conditions to avoid the influence of both undercooling and the shrinkage within the sample during solidification. The density of carbon steel was dependent on the phase but not carbon, silicon, manganese, phosphorus and sulfur contents.The density in L, d and g single phase regions, (Lϩd), (Lϩg), (dϩg) two phases regions and (Lϩdϩg) three phase region could be predicted using the experimental results for Fe-C binary steel and steel contained alloying elements.These estimated values are in good agreement with experimental results.

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Dendrite Morphology and Solute Redistribution during Solidification of 25Cr-20Ni Austenitic Stainless Steel

Cited by 11 publications

References 3 publications

High Temperature Deformation Behavior of Peritectic Carbon Steel during Solidification.

High Temperature Deformation Behavior of Peritectic Carbon Steel during Solidification.

Influence of Phosphorus on Solidification Structure in Continuously Cast 0.1 mass% Carbon Steel.

Prediction of Density of Carbon Steels.

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