The effect of microstructure on delayed hydride cracking behavior of Zircaloy-4 fuel cladding-an international atomic energy agency coordinated research program

被引：1

作者：

Coleman C. ^{[1
]}

Grigoriev V. ^{[2
]}

Inozemtsev V. ^{[3
]}

Markelov V. ^{[4
]}

Roth M. ^{[5
]}

Makarevicius V. ^{[6
]}

Kim Y.S. ^{[7
]}

Ali K.L. ^{[8
]}

Chakravarrty J.K. ^{[9
]}

Mizrahi R. ^{[10
]}

Lalgudi R. ^{[11
]}

机构：

[1] Chalk River Laboratories (CRL), AECL, Chalk River

[2] Studsvik Nuclear AB

[3] International Atomic Energy Agency (IAEA), Vienna 1400, Wagramer Strasse 5

[4] Joint Stock Company A. A. Bochvar High-Tech. Res. Inst. of Inorganic Materials (JSC VNIINM), Moscow 123098

[5] Materials Testing Group, Institute for Nuclear Research (INR), Romanian Authority for Nuclear Activities (RAAN), 115400 Mioveni, Piteşti, Campului St.

[6] Laboratory of Materials Research and Testing, Lithuanian Energy Institute (LEI), LT-44403, Kaunas

[7] Zirconium Team, Korea Atomic Energy Research Institute (KAERI)

[8] Pakistan Institute of Nuclear Science and Technology (PINST), Islamabad, P.O. Nilore

[9] Mechanical Metallurgy Section, Materials Group, Bhabha Atomic Research Centre (BARC)

[10] Materials Dept., National Atomic Energy Commission (CNEA-CAC), B1650KNA San Martín, Pcia. de Buenos Aires

[11] Materials Science and Technology Centre, Energy and Nuclear Research Institute (ENRI), C.P. 11049, Sao Paulo

来源：

Journal of ASTM International | 2010年 / 7卷 / 05期

关键词：

Delayed hydride cracking (DHC); K[!sub]i[!/sub] dependence; Microstructure; Pin-loading tension (plt); Temperature dependence; Zircaloy-4 fuel cladding;

D O I：

10.1520/JAI103008

中图分类号：

学科分类号：

摘要：

The rate of delayed hydride cracking (DHC) has been measured in Zircaloy-4 fuel cladding in several metallurgical conditions using the pin-loading tension technique. In light water reactor (LWR) cladding in the cold-worked and cold-worked and stress-relieved conditions, the cracking rate followed Arrhenius behavior up to about 280 °C, but at higher temperatures the rate declined with no cracking above 300°C. Non-LWR cladding appeared to behave in the same manner. In LWR cladding in the recrystallized condition, the cracking rate was highly variable because it depended on KI within the test range up to 25 MPa√m, whereas in the other LWR claddings, cracking rate was independent of KI, indicating that KIH was below 11 MPa√m. The main role of microstructure was to control the material strength; the cracking rate increased as the strength increased. Although all the claddings had a radial texture, it did not protect the cladding from DHC. The DHC fracture surface consisted of flat broken hydrides, often in arcs, but no striations were observed, except in one specimen subjected to thermal cycles. Copyright © 2010 by ASTM International.

引用

共 39 条

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