A STUDY OF THE DISTRIBUTION OF NB AND FE IN 2-PHASE ZR-2.5 WT-PERCENT NB ALLOYS

被引：31
|
作者：
PEROVIC, A [1 ]
PEROVIC, V [1 ]
WEATHERLY, GC [1 ]
PURDY, GR [1 ]
FLECK, RG [1 ]
机构：
[1] ONTARIO HYDRO,RES LABS,TORONTO M8Z 5S4,ONTARIO,CANADA
来源：
JOURNAL OF NUCLEAR MATERIALS | 1993年 / 199卷 / 02期
关键词：
D O I：
10.1016/0022-3115(93)90286-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An analytical transmission electron microscopy study of two-phase (alpha-beta) structures in a Zr-2.5 wt% Nb pressure tube alloy was used to follow the distribution of Nb and Fe as a function of alloy heat treatment and tube processing. The presence of Fe (approximately 0.1 wt%) modifies the (alpha - beta) phase equilibria as Fe is a beta-stabilizing element. Significant segregation of Fe to beta(Zr) and beta(Nb) structures was measured and shown to be in good agreement with the prediction of a graphical method used to find the phase boundaries in the ternary diagram (at the Zr corner) from the binary data. Segregation of Fe at alpha - alpha subboundaries was found in the as-extruded and cold-worked plus stress-relieved treatments. The Fe profiles, measured across subboundaries. indicated a strong segregation of Fe to the core or near-core regions of the dislocations comprising the boundary structure.
引用
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页码：102 / 111
页数：10
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