Effect of Si on precipitation behavior of Nb-Laves phase and amount of Nb in solid solution at elevated temperature in high purity 17%Cr-0.5%Nb steels

Yasushi Kato; Masatoshi Ito; Yoshimine Kato; Osamu Furukimi

doi:10.2320/matertrans.M2010112

Effect of Si on precipitation behavior of Nb-Laves phase and amount of Nb in solid solution at elevated temperature in high purity 17%Cr-0.5%Nb steels

Yasushi Kato, Masatoshi Ito, Yoshimine Kato, Osamu Furukimi

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The effect of Si was investigated on the precipitation behavior and the amount of Nb in solid solution at temperature ranging from 1073 to 1173 K in high purity 17Cr-0.5Nb steels. Adding Si promoted the precipitation of the Nb Laves phase and then decreased the solubility of Nb in steels. The Nb Laves phase which was composed of Fe, Cr and Nb could be expressed as (Fe, Cr) ₂Nb in a 0.002 mass% Si steel. On the other hand, in a 0.5 mass% Si steel the Nb Laves phase which was composed of Fe, Si, Cr and Nb could be expressed as (Fe, Si, Cr)₂Nb. Based on calculations from the experimental results assuming the Laves phase is Fe₂Nb, the standard free energy change of the Fe₂Nb precipitation reaction was about -61kJ/mol for a 0.002 mass% Si steel.

Original language	English
Pages (from-to)	1531-1535
Number of pages	5
Journal	Materials Transactions
Volume	51
Issue number	9
DOIs	https://doi.org/10.2320/matertrans.M2010112
Publication status	Published - Sept 2010

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Effect of Si on precipitation behavior of Nb-Laves phase and amount of Nb in solid solution at elevated temperature in high purity 17%Cr-0.5%Nb steels",

abstract = "The effect of Si was investigated on the precipitation behavior and the amount of Nb in solid solution at temperature ranging from 1073 to 1173 K in high purity 17Cr-0.5Nb steels. Adding Si promoted the precipitation of the Nb Laves phase and then decreased the solubility of Nb in steels. The Nb Laves phase which was composed of Fe, Cr and Nb could be expressed as (Fe, Cr) 2Nb in a 0.002 mass% Si steel. On the other hand, in a 0.5 mass% Si steel the Nb Laves phase which was composed of Fe, Si, Cr and Nb could be expressed as (Fe, Si, Cr)2Nb. Based on calculations from the experimental results assuming the Laves phase is Fe2Nb, the standard free energy change of the Fe2Nb precipitation reaction was about -61kJ/mol for a 0.002 mass% Si steel.",

author = "Yasushi Kato and Masatoshi Ito and Yoshimine Kato and Osamu Furukimi",

year = "2010",

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doi = "10.2320/matertrans.M2010112",

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volume = "51",

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T1 - Effect of Si on precipitation behavior of Nb-Laves phase and amount of Nb in solid solution at elevated temperature in high purity 17%Cr-0.5%Nb steels

AU - Kato, Yasushi

AU - Ito, Masatoshi

AU - Kato, Yoshimine

AU - Furukimi, Osamu

PY - 2010/9

Y1 - 2010/9

N2 - The effect of Si was investigated on the precipitation behavior and the amount of Nb in solid solution at temperature ranging from 1073 to 1173 K in high purity 17Cr-0.5Nb steels. Adding Si promoted the precipitation of the Nb Laves phase and then decreased the solubility of Nb in steels. The Nb Laves phase which was composed of Fe, Cr and Nb could be expressed as (Fe, Cr) 2Nb in a 0.002 mass% Si steel. On the other hand, in a 0.5 mass% Si steel the Nb Laves phase which was composed of Fe, Si, Cr and Nb could be expressed as (Fe, Si, Cr)2Nb. Based on calculations from the experimental results assuming the Laves phase is Fe2Nb, the standard free energy change of the Fe2Nb precipitation reaction was about -61kJ/mol for a 0.002 mass% Si steel.

AB - The effect of Si was investigated on the precipitation behavior and the amount of Nb in solid solution at temperature ranging from 1073 to 1173 K in high purity 17Cr-0.5Nb steels. Adding Si promoted the precipitation of the Nb Laves phase and then decreased the solubility of Nb in steels. The Nb Laves phase which was composed of Fe, Cr and Nb could be expressed as (Fe, Cr) 2Nb in a 0.002 mass% Si steel. On the other hand, in a 0.5 mass% Si steel the Nb Laves phase which was composed of Fe, Si, Cr and Nb could be expressed as (Fe, Si, Cr)2Nb. Based on calculations from the experimental results assuming the Laves phase is Fe2Nb, the standard free energy change of the Fe2Nb precipitation reaction was about -61kJ/mol for a 0.002 mass% Si steel.

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Effect of Si on precipitation behavior of Nb-Laves phase and amount of Nb in solid solution at elevated temperature in high purity 17%Cr-0.5%Nb steels

Abstract

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