The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes
To investigate the effect of hydrogen and oxygen contents on hydride reorientations during cool-down processes, zirconium–niobium cladding tube specimens were hydrogen-charged before some specimens were oxidized, resulting in 250 ppm and 500 ppm hydrogen-charged specimens containing no oxide and an...
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Elsevier
2015-10-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573315001552 |
| _version_ | 1818484782682603520 |
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| author | Hyun-Jin Cha Ki-Nam Jang Ji-Hyeong An Kyu-Tae Kim |
| author_facet | Hyun-Jin Cha Ki-Nam Jang Ji-Hyeong An Kyu-Tae Kim |
| author_sort | Hyun-Jin Cha |
| collection | DOAJ |
| description | To investigate the effect of hydrogen and oxygen contents on hydride reorientations during cool-down processes, zirconium–niobium cladding tube specimens were hydrogen-charged before some specimens were oxidized, resulting in 250 ppm and 500 ppm hydrogen-charged specimens containing no oxide and an oxide thickness of 3.8 μm at each surface. The nonoxidized and oxidized hydrogen-charged specimens were heated up to 400°C and then cooled down to room temperature at cooling rates of 0.3°C/min and 8.0°C/min under a tensile hoop stress of 150 MPa. The lower hydrogen contents and the slower cooling rate generated a larger fraction of radial hydrides, a longer radial hydride length, and a lower ultimate tensile strength and plastic elongation. In addition, the oxidized specimens generated a smaller fraction of radial hydrides and a lower ultimate tensile strength and plastic elongation than the nonoxidized specimens. This may be due to: a solubility difference between room temperature and 400°C; an oxygen-induced increase in hydrogen solubility and radial hydride nucleation energy; high temperature residence time during the cool-down; or undissolved circumferential hydrides at 400°C. |
| first_indexed | 2024-12-10T15:59:31Z |
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| id | doaj.art-fd2d5911ad4d43edb99a73c884ad8ecb |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-10T15:59:31Z |
| publishDate | 2015-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-fd2d5911ad4d43edb99a73c884ad8ecb2022-12-22T01:42:32ZengElsevierNuclear Engineering and Technology1738-57332015-10-0147674675510.1016/j.net.2015.06.004The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubesHyun-Jin ChaKi-Nam JangJi-Hyeong AnKyu-Tae KimTo investigate the effect of hydrogen and oxygen contents on hydride reorientations during cool-down processes, zirconium–niobium cladding tube specimens were hydrogen-charged before some specimens were oxidized, resulting in 250 ppm and 500 ppm hydrogen-charged specimens containing no oxide and an oxide thickness of 3.8 μm at each surface. The nonoxidized and oxidized hydrogen-charged specimens were heated up to 400°C and then cooled down to room temperature at cooling rates of 0.3°C/min and 8.0°C/min under a tensile hoop stress of 150 MPa. The lower hydrogen contents and the slower cooling rate generated a larger fraction of radial hydrides, a longer radial hydride length, and a lower ultimate tensile strength and plastic elongation. In addition, the oxidized specimens generated a smaller fraction of radial hydrides and a lower ultimate tensile strength and plastic elongation than the nonoxidized specimens. This may be due to: a solubility difference between room temperature and 400°C; an oxygen-induced increase in hydrogen solubility and radial hydride nucleation energy; high temperature residence time during the cool-down; or undissolved circumferential hydrides at 400°C.http://www.sciencedirect.com/science/article/pii/S1738573315001552Hydride precipitationHydrogen solubilityMechanical propertyZirconium alloy |
| spellingShingle | Hyun-Jin Cha Ki-Nam Jang Ji-Hyeong An Kyu-Tae Kim The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes Nuclear Engineering and Technology Hydride precipitation Hydrogen solubility Mechanical property Zirconium alloy |
| title | The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes |
| title_full | The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes |
| title_fullStr | The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes |
| title_full_unstemmed | The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes |
| title_short | The effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes |
| title_sort | effect of hydrogen and oxygen contents on hydride reorientations of zirconium alloy cladding tubes |
| topic | Hydride precipitation Hydrogen solubility Mechanical property Zirconium alloy |
| url | http://www.sciencedirect.com/science/article/pii/S1738573315001552 |
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