Statistical analysis of phosphorus segregation on intergranular fracture facets in pressure vessel steels

Su Wu; Rengen Ding; John Knott

doi:10.1179/174328407X154248

Statistical analysis of phosphorus segregation on intergranular fracture facets in pressure vessel steels

Su Wu, Rengen Ding, John Knott

Metallurgy and Materials

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

A533B and C - Mn steels, widely used as nuclear pressure vessel steels, have been aged at 520 degrees C after tempering at 650 degrees C for various periods of time to produce different levels of embrittlement resulting from the segregation of P to grain boundaries. Metallographic observation and tensile test results showed that the embrittlement heat treatment did not have significant influence on the microstructures or tensile properties of the steels. P segregation at grain boundaries and on intergranular facets was investigated using field emission gun transmission electron microscopy and Auger electron spectroscopy. After such treatment, enhanced segregation was found to be a linear function of the square root of embrittling time. Statistical analysis of the AES measurements indicated that there is a minimum segregation level for intergranular fracture to occur.

Original language	English
Pages (from-to)	1262-1268
Number of pages	7
Journal	Materials Science and Technology
Volume	23
Issue number	11
DOIs	https://doi.org/10.1179/174328407X154248
Publication status	Published - 1 Nov 2007

Keywords

statistical analysis
steel
fracture
embrittlement
segregation of impurities

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10.1179/174328407X154248

Platform : Fracture, Fatigue and Durability of Advanced Alloys and Composites for High Performance Applications
Bowen, P., Connolly, B., Davenport, A. & Knott, J.
Engineering & Physical Science Research Council
1/09/05 → 28/02/11
Project: Research Councils

Cite this

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title = "Statistical analysis of phosphorus segregation on intergranular fracture facets in pressure vessel steels",

abstract = "A533B and C - Mn steels, widely used as nuclear pressure vessel steels, have been aged at 520 degrees C after tempering at 650 degrees C for various periods of time to produce different levels of embrittlement resulting from the segregation of P to grain boundaries. Metallographic observation and tensile test results showed that the embrittlement heat treatment did not have significant influence on the microstructures or tensile properties of the steels. P segregation at grain boundaries and on intergranular facets was investigated using field emission gun transmission electron microscopy and Auger electron spectroscopy. After such treatment, enhanced segregation was found to be a linear function of the square root of embrittling time. Statistical analysis of the AES measurements indicated that there is a minimum segregation level for intergranular fracture to occur.",

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T1 - Statistical analysis of phosphorus segregation on intergranular fracture facets in pressure vessel steels

AU - Wu, Su

AU - Ding, Rengen

AU - Knott, John

PY - 2007/11/1

Y1 - 2007/11/1

N2 - A533B and C - Mn steels, widely used as nuclear pressure vessel steels, have been aged at 520 degrees C after tempering at 650 degrees C for various periods of time to produce different levels of embrittlement resulting from the segregation of P to grain boundaries. Metallographic observation and tensile test results showed that the embrittlement heat treatment did not have significant influence on the microstructures or tensile properties of the steels. P segregation at grain boundaries and on intergranular facets was investigated using field emission gun transmission electron microscopy and Auger electron spectroscopy. After such treatment, enhanced segregation was found to be a linear function of the square root of embrittling time. Statistical analysis of the AES measurements indicated that there is a minimum segregation level for intergranular fracture to occur.

AB - A533B and C - Mn steels, widely used as nuclear pressure vessel steels, have been aged at 520 degrees C after tempering at 650 degrees C for various periods of time to produce different levels of embrittlement resulting from the segregation of P to grain boundaries. Metallographic observation and tensile test results showed that the embrittlement heat treatment did not have significant influence on the microstructures or tensile properties of the steels. P segregation at grain boundaries and on intergranular facets was investigated using field emission gun transmission electron microscopy and Auger electron spectroscopy. After such treatment, enhanced segregation was found to be a linear function of the square root of embrittling time. Statistical analysis of the AES measurements indicated that there is a minimum segregation level for intergranular fracture to occur.

KW - statistical analysis

KW - steel

KW - fracture

KW - embrittlement

KW - segregation of impurities

U2 - 10.1179/174328407X154248

DO - 10.1179/174328407X154248

M3 - Article

SN - 1743-2847

VL - 23

SP - 1262

EP - 1268

JO - Materials Science and Technology

JF - Materials Science and Technology

IS - 11

ER -

Statistical analysis of phosphorus segregation on intergranular fracture facets in pressure vessel steels

Abstract

Keywords

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Platform : Fracture, Fatigue and Durability of Advanced Alloys and Composites for High Performance Applications

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