Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures
316L stainless steel is a promising material candidate for a hydrogen containment system. However, when in contact with hydrogen, the material could be degraded by hydrogen embrittlement (HE). Moreover, the mechanism and the effect of HE on 316L stainless steel have not been clearly studied. This st...
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MDPI AG
2019-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/6/625 |
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| author | Le Thanh Hung Nguyen Jae-Sik Hwang Myung-Sung Kim Jeong-Hyeon Kim Seul-Kee Kim Jae-Myung Lee |
| author_facet | Le Thanh Hung Nguyen Jae-Sik Hwang Myung-Sung Kim Jeong-Hyeon Kim Seul-Kee Kim Jae-Myung Lee |
| author_sort | Le Thanh Hung Nguyen |
| collection | DOAJ |
| description | 316L stainless steel is a promising material candidate for a hydrogen containment system. However, when in contact with hydrogen, the material could be degraded by hydrogen embrittlement (HE). Moreover, the mechanism and the effect of HE on 316L stainless steel have not been clearly studied. This study investigated the effect of hydrogen exposure on the impact toughness of 316L stainless steel to understand the relation between hydrogen charging time and fracture toughness at ambient and cryogenic temperatures. In this study, 316L stainless steel specimens were exposed to hydrogen in different durations. Charpy V-notch (CVN) impact tests were conducted at ambient and low temperatures to study the effect of HE on the impact properties and fracture toughness of 316L stainless steel under the tested temperatures. Hydrogen analysis and scanning electron microscopy (SEM) were conducted to find the effect of charging time on the hydrogen concentration and surface morphology, respectively. The result indicated that exposure to hydrogen decreased the absorbed energy and ductility of 316L stainless steel at all tested temperatures but not much difference was found among the pre-charging times. Another academic insight is that low temperatures diminished the absorbed energy by lowering the ductility of 316L stainless steel. |
| first_indexed | 2024-12-23T11:47:24Z |
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| id | doaj.art-88972e99b3434dc6b437d2e717db3bcd |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-23T11:47:24Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-88972e99b3434dc6b437d2e717db3bcd2022-12-21T17:48:19ZengMDPI AGMetals2075-47012019-05-019662510.3390/met9060625met9060625Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic TemperaturesLe Thanh Hung Nguyen0Jae-Sik Hwang1Myung-Sung Kim2Jeong-Hyeon Kim3Seul-Kee Kim4Jae-Myung Lee5Department of Naval Architecture and Ocean Engineering, Pusan National University, 30, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, KoreaDepartment of Naval Architecture and Ocean Engineering, Pusan National University, 30, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, KoreaDepartment of Naval Architecture and Ocean Engineering, Pusan National University, 30, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, KoreaDepartment of Naval Architecture and Ocean Engineering, Pusan National University, 30, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, KoreaDepartment of Naval Architecture and Ocean Engineering, Pusan National University, 30, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, KoreaDepartment of Naval Architecture and Ocean Engineering, Pusan National University, 30, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, Korea316L stainless steel is a promising material candidate for a hydrogen containment system. However, when in contact with hydrogen, the material could be degraded by hydrogen embrittlement (HE). Moreover, the mechanism and the effect of HE on 316L stainless steel have not been clearly studied. This study investigated the effect of hydrogen exposure on the impact toughness of 316L stainless steel to understand the relation between hydrogen charging time and fracture toughness at ambient and cryogenic temperatures. In this study, 316L stainless steel specimens were exposed to hydrogen in different durations. Charpy V-notch (CVN) impact tests were conducted at ambient and low temperatures to study the effect of HE on the impact properties and fracture toughness of 316L stainless steel under the tested temperatures. Hydrogen analysis and scanning electron microscopy (SEM) were conducted to find the effect of charging time on the hydrogen concentration and surface morphology, respectively. The result indicated that exposure to hydrogen decreased the absorbed energy and ductility of 316L stainless steel at all tested temperatures but not much difference was found among the pre-charging times. Another academic insight is that low temperatures diminished the absorbed energy by lowering the ductility of 316L stainless steel.https://www.mdpi.com/2075-4701/9/6/625cryogenic temperaturehydrogen embrittlementimpact loadcharpy impact test |
| spellingShingle | Le Thanh Hung Nguyen Jae-Sik Hwang Myung-Sung Kim Jeong-Hyeon Kim Seul-Kee Kim Jae-Myung Lee Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures Metals cryogenic temperature hydrogen embrittlement impact load charpy impact test |
| title | Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures |
| title_full | Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures |
| title_fullStr | Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures |
| title_full_unstemmed | Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures |
| title_short | Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures |
| title_sort | charpy impact properties of hydrogen exposed 316l stainless steel at ambient and cryogenic temperatures |
| topic | cryogenic temperature hydrogen embrittlement impact load charpy impact test |
| url | https://www.mdpi.com/2075-4701/9/6/625 |
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