Effects of Aging at 550 °C on α′-Martensitic Transformation of High Si-Bearing Metastable Austenitic Stainless Steel Weld Metal
文献类型：期刊论文
| 作者 | Chen, Yakui1,2; Wei, Shitong1,3; Wu, Dong1,3; Lu, Shanping1 |
| 刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| 出版日期 | 2024-04-22 |
| 页码 | 13 |
| 关键词 | Metastable austenitic stainless steel weld metal alpha '-martensitic transformation delta-ferrite sigma-phase |
| ISSN号 | 1006-7191 |
| DOI | 10.1007/s40195-024-01697-x |
| 通讯作者 | Wu, Dong(wudong@imr.ac.cn) ; Lu, Shanping(shplu@imr.ac.cn) |
| 英文摘要 | The high Si-bearing 15Cr-9Ni-Nb metastable austenitic stainless steel weld metal was prepared via gas tungsten arc welding and then processed by stabilized heat treatment (SHT) at 850 degrees C for 3 h. The effects of 550 degrees C aging on the alpha '-martensitic transformation of the as-welded and the SHT weld metals were investigated. The results showed that the weld metal had poor thermal stability of austenite. The precipitation of NbC during the 850 degrees C SHT made the thermal stability of the local matrix decrease and led to the formation of a large amount of C-depleted alpha '-martensite. The precipitation of coarse sigma-phase at the delta-ferrite led to the Cr-depleted zone and the formation of Cr-depleted alpha '-martensite at the early stage of 550 degrees C aging. The homogenized diffusion of C and Cr in the matrix during 550 degrees C aging led to the restoration of austenitic thermal stability and the decrease of alpha '-martensite content. The C-depleted alpha '-martensite content in the SHT weld metal decreased rapidly at the early stage of aging due to the fast diffusion rate of the C atom in the matrix, while the Cr-depleted alpha '-martensite decreased at the later stage of aging due to the decreased diffusion rate of the Cr. |
| 资助项目 | National Key Research and Development Program of China[2018YFA0702902] ; Innovation Project of Shenyang National Laboratory for Materials Science[SYNL-2022] ; China Institute of Atomic Energy[E141L803J1] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001206458600003 |
| 出版者 | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| 资助机构 | National Key Research and Development Program of China ; Innovation Project of Shenyang National Laboratory for Materials Science ; China Institute of Atomic Energy |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wu, Dong; Lu, Shanping |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yakui,Wei, Shitong,Wu, Dong,et al. Effects of Aging at 550 °C on α′-Martensitic Transformation of High Si-Bearing Metastable Austenitic Stainless Steel Weld Metal[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2024:13. |
| APA | Chen, Yakui,Wei, Shitong,Wu, Dong,&Lu, Shanping.(2024).Effects of Aging at 550 °C on α′-Martensitic Transformation of High Si-Bearing Metastable Austenitic Stainless Steel Weld Metal.ACTA METALLURGICA SINICA-ENGLISH LETTERS,13. |
| MLA | Chen, Yakui,et al."Effects of Aging at 550 °C on α′-Martensitic Transformation of High Si-Bearing Metastable Austenitic Stainless Steel Weld Metal".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2024):13. |
入库方式： OAI收割
来源：金属研究所
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