CR-RICH PRECIPITATES IMPACT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF FE-23CR-2.4MO FERRITIC STAINLESS STEEL

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FARJAM HAJIAGHA KH.; AKBARI A.R.; MOHAMMADZADEH R.

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Journal: METALLURGICAL ENGINEERING Year:2014 | Volume:17 | Issue:53 Page(s): 9-16

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Title

CR-RICH PRECIPITATES IMPACT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF FE-23CR-2.4MO FERRITIC STAINLESS STEEL

Author(s)

FARJAM HAJIAGHA KH. | AKBARI A.R. | MOHAMMADZADEH R. | Issue Writer Certificate

Keywords

FERRITIC STAINLESS STEELQ2

CR-RICH PRECIPITATESQ2

LATTICE PARAMETERQ3

HARDNESSQ2

GRAIN SIZEQ2

Abstract

In this study, Influence of formation of CR-RICH PRECIPITATES on microstructure and mechanical properties of Fe-23 Cr-2.4 Mo FERRITIC STAINLESS STEEL has been investigated. In this regard, samples of this steel were homogenized at 1100oC for 48 hours and then were cooled in furnace. Microstructure, phase composition, and HARDNESS of the samples were investigated using optical and scanning electron microscopes, X-ray diffraction and micro-hardness measurements. Results of microstructural observations and thermodynamic evaluations showed that CR-RICH PRECIPITATES are formed in the steel microstructure due to slow cooling after homogenizing treatment. In order to dissolve the CR-RICH PRECIPITATES; formed during slow cooling, a number of samples were subjected to solution treatments at 1100oC, 1150oC for 5 hours and then were quenched in water. Results showed that at temperature of 1100oC precipitates are not dissolved entirely but at 1150oC they are dissolved completely. After solution treatment at 1150oC followed by water quenching no longer precipitation is took place due to the fast cooling rate. Results of phase analysis and microhardness measurements showed that solution treatment at 1150oC lead to increase of ferrite LATTICE PARAMETER from 2.880 Åto 2.893Å and also enhancement HARDNESS from 211 to 317 Vickers despite an increase in ferrite GRAIN SIZE. These results confirm dissolution of CR-RICH PRECIPITATES in the ferrite matrix.

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APA: Copy

FARJAM HAJIAGHA, KH., AKBARI, A.R., & MOHAMMADZADEH, R.. (2014). CR-RICH PRECIPITATES IMPACT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF FE-23CR-2.4MO FERRITIC STAINLESS STEEL. METALLURGICAL ENGINEERING, 17(53 ), 9-16. SID. https://sid.ir/paper/112410/en

Vancouver: Copy

FARJAM HAJIAGHA KH., AKBARI A.R., MOHAMMADZADEH R.. CR-RICH PRECIPITATES IMPACT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF FE-23CR-2.4MO FERRITIC STAINLESS STEEL. METALLURGICAL ENGINEERING[Internet]. 2014;17(53 ):9-16. Available from: https://sid.ir/paper/112410/en

IEEE: Copy

KH. FARJAM HAJIAGHA, A.R. AKBARI, and R. MOHAMMADZADEH, “CR-RICH PRECIPITATES IMPACT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF FE-23CR-2.4MO FERRITIC STAINLESS STEEL,” METALLURGICAL ENGINEERING, vol. 17, no. 53 , pp. 9–16, 2014, [Online]. Available: https://sid.ir/paper/112410/en

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