MICROSTRUCTURAL AND MICROCHEMICAL STUDIES OF ZR-2.5NB PRESSURE TUBE ALLOY

被引：39
|
作者：
PEROVIC, V
PEROVIC, A
WEATHERLY, GC
BROWN, LM
PURDY, GR
FLECK, RG
HOLT, RA
机构：
[1] MCMASTER UNIV, DEPT MAT SCI & ENGN, HAMILTON L8S 4M1, ONTARIO, CANADA
[2] UNIV CAMBRIDGE, CAVENDISH LAB, CAMBRIDGE CB3 0HE, ENGLAND
[3] CHALK RIVER NUCL LABS, REACTOR MAT RES, CHALK RIVER K0J 1J0, ON, CANADA
来源：
JOURNAL OF NUCLEAR MATERIALS | 1993年 / 205卷
关键词：
D O I：
10.1016/0022-3115(93)90087-F
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and distribution of Nb and Fe in a standard Zr-2.5Nb pressure tube alloy has been studied by analytical electron microscopy before and after irradiation (approximately 5 x 10(25) n/m2 ; E > 1 MeV at 553 K). Irradiation produces pronounced changes in both the dislocation substructure and the chemical composition of the alpha and beta-phases. Both [a] and [c]-component defects are observed after irradiation; [c]-component screw dislocations are split after irradiation and are decorated by beta(Nb) particles. There is copious precipitation of beta(Nb) in the alpha-phase. Fe segregation is found at alpha-alpha subboundaries and in the beta-phase prior to irradiation. After irradiation increased levels of Fe are observed at alpha-alpha subboundaries, while the beta-phase is depleted of Fe.
引用
收藏
页码：251 / 257
页数：7
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