APT characterization of high nickel RPV steels

被引：70

作者：

Miller, M. K. ^{[1
]}

Sokolov, M. A. ^{[1
]}

Nanstad, R. K. ^{[1
]}

Russell, K. F. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Met & Ceram, Microstruct Grp, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2006年 / 351卷 / 1-3期

关键词：

D O I：

10.1016/j.jnucmat.2006.02.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructures of three high nickel content pressure vessel steels have been characterized by atom probe tomography to investigate the influence of high nickel levels on the response to neutron irradiation of high and low copper pressure vessel steels. The high-nickel, low-manganese, low-copper VVER-1000 weld and forging exhibited lower than predicted levels of embrittlement during neutron irradiation. The Palisades weld exhibits a Delta T-41J of 102 degrees C which was significantly lower than the value of 154 degrees C predicted by Reg. Guide 1.99 Rev. 2. Atom probe tomography revealed nickel-, manganese-, and silicon-enriched precipitates in both the VVER- 1000 base and weld materials after neutron irradiation. A high number density of copper-, nickel-, manganese-, silicon- and phosphorus-enriched precipitates were observed in the Palisades weld after neutron irradiation. Atom probe tomography also revealed high levels of phosphorus segregation to the dislocations in all three materials. Published by Elsevier B.V.

引用

页码：187 / 196

页数：10

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