Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment
This study investigated the creep and creep crack growth (CCG) behavior of the base metal (BM), weld metal (WM), and heat affected zone (HAZ) in a Gr. 91 weldment, which was made by a shield metal arc weld process. A series of tensile, creep, and CCG tests were performed for the BM, WM, and HAZ at 5...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-02-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573320303855 |
| _version_ | 1823941374878154752 |
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| author | Woo-Gon Kim Injin Sah Seon-Jin Kim Hyeong-Yeon Lee Eung-Seon Kim |
| author_facet | Woo-Gon Kim Injin Sah Seon-Jin Kim Hyeong-Yeon Lee Eung-Seon Kim |
| author_sort | Woo-Gon Kim |
| collection | DOAJ |
| description | This study investigated the creep and creep crack growth (CCG) behavior of the base metal (BM), weld metal (WM), and heat affected zone (HAZ) in a Gr. 91 weldment, which was made by a shield metal arc weld process. A series of tensile, creep, and CCG tests were performed for the BM, WM, and HAZ at 550 °C. Creep behavior of the BM, WM, and HAZ was analyzed in terms of various creep laws; Norton’s power-law, Monkman-Grant relation and damage tolerance factor (λ), and their constants were determined. In addition, each CCGR law for the BM, WM, and HAZ was proposed and compared in terms of a C∗-fracture parameter. The WM and HAZ revealed faster creep rate, lower rupture ductility, and faster CCGRs than the BM, but they showed a similar behavior in the creep and CCG. The CCGRs obtained in the present study exhibited a marginal difference when compared with those of RCC-MRx of currently elevated design code in France. A creep crack path in the HAZ plane progressed towards a weak fine-grained HAZ adjacent to the BM. |
| first_indexed | 2024-12-17T04:26:23Z |
| format | Article |
| id | doaj.art-5a90f03457f7453d9c65fe9ceb05b7f4 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-17T04:26:23Z |
| publishDate | 2021-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-5a90f03457f7453d9c65fe9ceb05b7f42022-12-21T22:03:41ZengElsevierNuclear Engineering and Technology1738-57332021-02-01532572582Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldmentWoo-Gon Kim0Injin Sah1Seon-Jin Kim2Hyeong-Yeon Lee3Eung-Seon Kim4Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea; Corresponding author.Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of KoreaPukyong National University, 365 Shinsunro, Nam-gu, Busan, 608-739, Republic of KoreaKorea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of KoreaKorea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of KoreaThis study investigated the creep and creep crack growth (CCG) behavior of the base metal (BM), weld metal (WM), and heat affected zone (HAZ) in a Gr. 91 weldment, which was made by a shield metal arc weld process. A series of tensile, creep, and CCG tests were performed for the BM, WM, and HAZ at 550 °C. Creep behavior of the BM, WM, and HAZ was analyzed in terms of various creep laws; Norton’s power-law, Monkman-Grant relation and damage tolerance factor (λ), and their constants were determined. In addition, each CCGR law for the BM, WM, and HAZ was proposed and compared in terms of a C∗-fracture parameter. The WM and HAZ revealed faster creep rate, lower rupture ductility, and faster CCGRs than the BM, but they showed a similar behavior in the creep and CCG. The CCGRs obtained in the present study exhibited a marginal difference when compared with those of RCC-MRx of currently elevated design code in France. A creep crack path in the HAZ plane progressed towards a weak fine-grained HAZ adjacent to the BM.http://www.sciencedirect.com/science/article/pii/S1738573320303855CreepCreep crack growthGrade 91 steelWeld metalHeat affected zone |
| spellingShingle | Woo-Gon Kim Injin Sah Seon-Jin Kim Hyeong-Yeon Lee Eung-Seon Kim Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment Nuclear Engineering and Technology Creep Creep crack growth Grade 91 steel Weld metal Heat affected zone |
| title | Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment |
| title_full | Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment |
| title_fullStr | Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment |
| title_full_unstemmed | Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment |
| title_short | Creep and creep crack growth behaviors for base, weld, and heat affected zone in a grade 91 weldment |
| title_sort | creep and creep crack growth behaviors for base weld and heat affected zone in a grade 91 weldment |
| topic | Creep Creep crack growth Grade 91 steel Weld metal Heat affected zone |
| url | http://www.sciencedirect.com/science/article/pii/S1738573320303855 |
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