| Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging | |
| Xiao, Xiaopeng1,2; Li, Dianzhong1; Li, Yiyi1,3; Lu, Shanping1 | |
| Corresponding Author | Lu, Shanping(shplu@imr.ac.cn) |
| 2021-08-01 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 178Pages:11 |
| Abstract | Stress relaxation cracking failure is widely reported in the materials used for thermal power plants, which seriously affected the safety of thermal power units under long-term service. In our study, the influence of intergranular precipitation behavior on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal was investigated based on the pre-compressed CT technique. The 45 degrees misorientation grain boundary has the lowest critical interfacial nucleation energy, followed by the grain boundaries away from the 45 degrees misorientation. As a result, the coarse intergranular M23C6 carbides were more prone to precipitate at 45 degrees misorientation grain boundary, which led to the lowest resistance to stress relaxation cracking susceptibility at 35 to 45 degrees grain boundary. Further analysis indicated that intergranular cavities were easily initiated at the noncoherent M23C6/gamma interface. Since the non-coherent interface with a low Cr concentration zone and high specific interfacial energy had a lower strength, the lattice distortion at the non-coherent interface could lead to higher strain concentration. |
| Keyword | Stress relaxation cracking Austenitic stainless steel weld metal Grain boundary misorientation Depletion of Cr |
| Funding Organization | Shenyang National Laboratory for Materials Science Innovation |
| DOI | 10.1016/j.matchar.2021.111309 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Shenyang National Laboratory for Materials Science Innovation[L2019R35] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000678042300002 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/159736 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Lu, Shanping |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Xiao, Xiaopeng,Li, Dianzhong,Li, Yiyi,et al. Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging[J]. MATERIALS CHARACTERIZATION,2021,178:11. |
| APA | Xiao, Xiaopeng,Li, Dianzhong,Li, Yiyi,&Lu, Shanping.(2021).Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging.MATERIALS CHARACTERIZATION,178,11. |
| MLA | Xiao, Xiaopeng,et al."Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging".MATERIALS CHARACTERIZATION 178(2021):11. |
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