| Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal | |
| Wu, Dong1,2; Li, Dianzhong3; Lu, Shanping1,3 | |
| Corresponding Author | Lu, Shanping(shplu@imr.ac.cn) |
| 2018-06-15 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 749Pages:465-472 |
| Abstract | Microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal with different Cr contents was investigated during long-term thermal exposures up to 10000 h at 700 degrees C. With an increase in the Cr content from 21.1 to 23.5 at.%, plate-like sigma (sigma) and alpha-Cr phases formed during the thermal exposure. These phases were mainly located in the interdendritic areas and grew significantly as the thermal exposure time increased. The coarsening process of the gamma' phase obeyed the Lifshitz, Slyozov, and Wagner (LSW) model, and the gamma' particles maintained a coherent relationship with the gamma matrix during the thermal exposure. Carbides (M23C6) formed and coarsened at the grain boundaries, and their distribution gradually transformed from discontinuous to continuous during the thermal exposure. The evolutions of the gamma' phase and M23C6 carbides were not significantly affected by the Cr-content variation. As the thermal exposure time increased, the room-temperature impact toughness degraded significantly, and a ductile (intragranular)/brittle (mixed intergranular and intragranular) transition occurred. The degradation of impact toughness mainly occurred due to coarsening of the M23C6 carbides along the grain boundaries and the growth of plate-like phases (sigma, alpha-Cr) in the interdendritic areas. (C) 2018 Elsevier B.V. All rights reserved. |
| Keyword | Metal Grain boundaries Scanning and transmission electron microscopy X-ray diffraction High temperature alloys |
| Funding Organization | National High Technology Research and Development Program |
| DOI | 10.1016/j.jallcom.2018.03.314 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National High Technology Research and Development Program[2012AA03A501] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000432666200053 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/128111 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Lu, Shanping |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Dong,Li, Dianzhong,Lu, Shanping. Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,749:465-472. |
| APA | Wu, Dong,Li, Dianzhong,&Lu, Shanping.(2018).Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal.JOURNAL OF ALLOYS AND COMPOUNDS,749,465-472. |
| MLA | Wu, Dong,et al."Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal".JOURNAL OF ALLOYS AND COMPOUNDS 749(2018):465-472. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment