Determination of Neutron Irradiation-Induced Phosphorus Segregation on Grain Boundaries in a P-doped 2.25Cr1Mo Steel

材料科学技术（英文）, 2004, 20(1): 81-85.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

2.Institute of Polymer Technology and Materials Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK

3.Berkeley Centre, BNFL Magnox Generation, Berkeley, Gloucestershire GL13 9PB, UK

4.School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

5.School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

6.School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

基金项目: BNFL Magnox Generation

Determination of Neutron Irradiation-Induced Phosphorus Segregation on Grain Boundaries in a P-doped 2.25Cr1Mo Steel

Keywords： Neutron irradiation

Irradiation-induced impurity segregation to grain boundaries is one of the important radiation effects on materials.For this reason, phosphorus segregation to prior austenite grain boundaries in a P-doped 2.25Cr1Mo steel subjected to neutron irradiation is examined using field emission gun scanning transmission electron microscopy (FEGSTEM) with energy dispersive X-ray microanalysis (EDX). The steel samples are irradiated around 270 and 400℃, respectively.The irradiation dose rate and dose are ～1.05×10-8 dpa/s and ～0.042 dpa respectively for 270℃ irradiation, and 1.7×10-8 dpa/s and 0.13 dpa respectively for 400℃ irradiation. The FEGSTEM results indicate that there is no apparent phosphorus segregation during 270℃ irradiation but there is some during 400℃ irradiation.

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Determination of Neutron Irradiation-Induced Phosphorus Segregation on Grain Boundaries in a P-doped 2.25Cr1Mo Steel

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