Microstructural evolution in zirconium based alloys

Tewari, R.; Srivastava, D.; Dey, G.K.; Chakravarty, Jayashree; Banerjee, Suparna

doi:10.1016/j.jnucmat.2008.08.041

Cited by 99 publications

(38 citation statements)

References 53 publications

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“…All the important properties of zirconium alloys are dependent on the microstructure obtained from the manufacturing process. Several different processing routes to optimize the microstructure of fuel rods are proposed in literature [4][5][6] with most of them indicating the recrystallized microstructure as more suitable for nuclear applications 7,8 . In fact, most of zirconium alloys in Pressurized Water Reactors (PWR) display a partial or fully-recrystallized microstructure 8 .…”

Section: Introductionmentioning

confidence: 99%

“…The low solubility of hydrogen in the α-Zr phase leads to hydride formation, reducing ductility and fracture toughness, limiting the integrity of zirconium alloy components 4,9 . Zirconium hydride amount and orientation depend on the composition and manufacturing process, which affects the microstructure and texture of the alloy 4,10 .…”

Section: Introductionmentioning

confidence: 99%

“…Zirconium hydride amount and orientation depend on the composition and manufacturing process, which affects the microstructure and texture of the alloy 4,10 . In order to avoid the risk of premature failure related to hydrogen degradation, its absorption kinetics and its effect on the mechanical properties in zirconium alloys are topics of great interest…”

Section: Introductionmentioning

confidence: 99%

“…Zr-Nb based alloys have allowed to improve PWR performance, especially for higher burn-up of the fuel 12 and their processing and microstructure have been extensively studied [4][5][6] . Despite this, hydrogen kinetics interaction with the microstructure and its effect on mechanical properties under recrystallized conditions is still not fully understood.…”

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confidence: 99%

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Hydrogen Kinetics and Hydride Formation Effect on Zr-1Nb and Zr-1Nb-1Sn-0.1Fe Alloys for Nuclear Application

et al. 2018

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The purpose of this study was to investigate the kinetics of hydrogen absorption and hydride formation and their effect on the mechanical properties in Zr-1Nb and Zr-1Nb-1Sn-0.1Fe alloys, which were thermomechanically processed and gaseously hydrided at 320ºC under 10 bar hydrogen pressure. X-ray diffraction (XRD) confirmed the formation of α-Zr matrix after final heat treatment. The alloys absorbed almost the same amount of hydrogen, although with different kinetics. Absorption began almost immediately in Zr-1Nb alloy whilst in Zr-1Nb-1Sn-0.1Fe hydrogen absorption started after 11 h besides a faster hydrogen kinetics. Results showed that tensile strengths for both alloys were nearly independent of absorbed hydrogen. Fractographic examinations indicated ductile fractures for unhydrided condition whereas quasi-cleavage features were observed for all hydrided specimens.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Hydrogen Kinetics and Hydride Formation Effect on Zr-1Nb and Zr-1Nb-1Sn-0.1Fe Alloys for Nuclear Application

et al. 2018

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“…Few new biomedical Zr-based alloys have been designed and investigated by selection of biocompatible elements for the alloying of pure Zr, including Zr-niobium (Nb) alloys 10) and Zr-molybdenum (Mo) alloys 11,12) . In Zr-Nb alloys, the microstructure and mechanical properties are governed by the Nb content 13,14) . Mechanical properties of alloys with different Nb concentrations have been evaluated 15,16) .…”

Section: Introductionmentioning

confidence: 99%

Formation of white oxide layer on Zr-14Nb alloy using thermal treatment

Doi

Tsutsumi

et al. 2014

Dent. Mater. J.

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This study aimed to develop a novel abutment material with good esthetic and mechanical properties by producing a white oxide layer on a zirconium-14 mass% niobium (Zr-14Nb) alloy substrate using a thermal oxidation process. Oxidation temperatures ranged 700-1000°C and oxidation time ranged 30-180 min. The color of the oxide layer varied depending on temperature and time. A white oxide layer was obtained under appropriate conditions. The oxide layer thickness increased with increased temperature and time, as revealed by scanning electron microscopy with energy-dispersive X-ray spectroscopy. Moreover, X-ray diffraction and X-ray photoelectron spectroscopy revealed that the oxide layer was predominantly monoclinic ZrO 2 , tetragonal ZrO 2 , and Nb 2 O 5 . The oxide layer revealed good abrasion resistance and high adhesion to the substrate. This novel process for producing white materials with good mechanical properties will be useful for abutments and prostheses in dental implant treatment.

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