Quantitative carbide analysis using the Rietveld method for 2.25Cr-1Mo-0.25V steel

Journal Article · Tue Sep 15 00:00:00 EDT 2009 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2009.03.009· OSTI ID:22066122

Yongtao, Zhang ^[1]; Haibo, Han ^[2]; Lede, Miao ^[3]; Jinfu, Li ^[1]

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1. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240 (China)
2. Instrumental analysis center, Shanghai Jiaotong University, Shanghai 200240 (China)
3. Research Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201900 (China)

It is usually difficult to quantitatively determine the mass fraction of each type of precipitates in steels using transmission electron microscopy and traditional X-ray powder diffraction analysis methods. In this paper the Rietveld full-pattern fitting algorithm was employed to calculate the relative mass fractions of the precipitates in 2.25Cr-1Mo-0.25V steel. The results suggest that the fractions of MC, M{sub 7}C{sub 3} and M{sub 23}C{sub 6} carbides were evaluated precisely and relatively quickly. In addition, it was found that the fine MC phase dissolved into the matrix with prolonged tempering.

• OSTI ID: 22066122
• Journal Information: Materials Characterization, Vol. 60, Issue 9; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALGORITHMS
CARBIDES
CHROMIUM-MOLYBDENUM STEELS
DISSOLUTION
MATRIX MATERIALS
PRECIPITATION
TEMPERING
TRANSMISSION ELECTRON MICROSCOPY
VANADIUM ALLOYS
X-RAY DIFFRACTION