Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal
文献类型：期刊论文
| 作者 | Wu, D1; Li, DZ; Lu, SP |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2018-06-15 |
| 卷号 | 749页码:465-472 |
| 关键词 | Metal Grain boundaries Scanning and transmission electron microscopy X-ray diffraction High temperature alloys |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2018.03.314 |
| 英文摘要 | 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. |
| 学科主题 | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000432666200053 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/80153]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 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 |
| 推荐引用方式 GB/T 7714 | Wu, D,Li, DZ,Lu, SP. 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, D,Li, DZ,&Lu, SP.(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, D,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. |
入库方式： OAI收割
来源：金属研究所
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