Influence of the cooling rate on the texture and the microstructure of Zircaloy-4 studied by means of a Jominy end-quench test

被引：21

作者：

Ben Ammar, Y. ^{[1
]}

Aoufi, A. ^{[1
]}

Darrieulat, M. ^{[1
]}

机构：

[1] Ecole Natl Super Mines, SMS EMSE, CNRS LCG UMR5146, F-42023 St Etienne, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 556卷

关键词：

Non-ferrous alloy; Phase transformation; Hardness measurement; Electron BackScattering Diffraction (EBSD); X-ray diffraction; ALPHA PHASE-TRANSFORMATION; VARIANT SELECTION; TITANIUM-ALLOYS; HOT EXTRUSION; BETA; RECRYSTALLIZATION; ZY-4;

D O I：

10.1016/j.msea.2012.06.077

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

When zirconium alloys are used for fuel cladding in nuclear plants, they are beta quenched and then extruded and rolled in the upper alpha range. At the start of this mechanical process, the alloys possess a lamellar, Widmanstatten microstructure. When the quenching is applied to large billets, the difference of cooling rates between the outer surface and the core of the piece produces variations in the microstructure. To investigate this phenomenon, the Jominy end-quench device has been adapted here to Zircaloy-4. The width of the lamellae, the size of the colonies and of the precipitates, the hardness are shown to depend strongly on the cooling rate. Other features of the quenched material are less rate-dependent: the sharp texture provoked by the alpha -> beta -> alpha transformation, the disposition of the lamellae (intricated or parallel) and the number of the principal variants found within the former p grains. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：184 / 193

页数：10

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