Impact of high dose krypton ion irradiation on corrosion behavior of laser beam welded zircaloy-4

Journal Article · Thu Feb 02 00:00:00 EST 2006 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2005.08.007· OSTI ID:20891628

Qian, Wan ^[1]; Xinde, Bai ^[2]; Xiangyu, Zhang ^[1]

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1. Department of Engineering Physics, Tsinghua University, Beijing100084 (China)
2. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)

In order to study the effect of krypton ion irradiation on the aqueous corrosion behavior of laser beam welded zircaloy-4 (LBWZr4), the butt weld joint of zircaloy-4 was made by means of a carbon dioxide laser, subsequently the LBWZr4 samples were irradiated with Kr ions using an accelerator at an energy of 300 keV, with a dose range from 1 x 10{sup 15} to 3 x 10{sup 16} ions/cm{sup 2} at about 150 deg. C. Three-sweep potentiodynamic polarization measurement was employed to evaluate the aqueous corrosion behavior of Kr-irradiated LBWZr4 in a 0.5 M H{sub 2}SO{sub 4} solution. Scanning electron microscopy (SEM) was used to examine the surface topography of the Kr-irradiated LBWZr4 after the potentiodynamic polarization measurement. Transmission electron microscopy was employed to examine the change of microstructures in the irradiated surface. The polarization tests showed that compared with the passive current density of the as-received LBWZr4, the Kr-irradiated LBWZr4 is much lower; however, with the irradiation dose increasing from 1 x 10{sup 15} to 3 x 10{sup 16} ions/cm{sup 2}, the passive current density, closely related to the surface corrosion resistance, increased remarkably. The mechanism of the corrosion behavior transformation was due to the recrystallization of the amorphous phase induced by the lower ion irradiation.

• OSTI ID: 20891628
• Journal Information: Materials Research Bulletin, Vol. 41, Issue 2; Other Information: DOI: 10.1016/j.materresbull.2005.08.007; PII: S0025-5408(05)00301-6; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHOUS STATE
CARBON DIOXIDE LASERS
CORROSION
CORROSION RESISTANCE
CRYSTAL STRUCTURE
CURRENT DENSITY
ELECTROCHEMISTRY
IRRADIATION
KRYPTON IONS
MICROSTRUCTURE
POLARIZATION
RADIATION DOSES
RECRYSTALLIZATION
SCANNING ELECTRON MICROSCOPY
SULFURIC ACID
TRANSMISSION ELECTRON MICROSCOPY
WELDED JOINTS
ZIRCALOY 4