Abnormal grain growth in the Ni-based wrought superalloy GH4698 bar during heat treatment
文献类型：期刊论文
| 作者 | Qiao, Shichang1,2; Liu, Shuai1,2; Li, Na1,2; Gao, Xinyu1,2; Wen, Xin1,2; Wang, Fengzhen1,2; Yuan, Chao1,2 |
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 30页码:6563-6575 |
| 关键词 | Wrought superalloy Abnormal grain growth Stored energy Grain orientation spread Sigma 3 n boundary |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2024.05.089 |
| 通讯作者 | Yuan, Chao(ychao@imr.ac.cn) |
| 英文摘要 | The microstructure evolution of the wrought superalloy GH4698 bar subjected to annealing was investigated during solution treatment, with managing temperature and duration. The differences in mechanical properties between the core and the edge of annealed rod are attributed to residual stresses introduced by surface grinding in the shallow layers of the bar. Experimental findings of heat treatment revealed that grains in the core of the bar grow normally, with the average size exhibiting exponential growth with respect to the solution temperature and time. Abnormally large grains (ALGs) were observed at the edge of the rod under sup-solvus temperature. The presence of gamma ' can restrict grain growth, but the dissolution of gamma ' is not the fundamental cause leading to the occurrence of abnormal grain growth (AGG). The initial reason for AGG at the edge position lies in the presence of stored energy (SE). Grains undergoing abnormal growth are not with high SE and the nucleus of ALGs originate from static recrystallization triggered by SE. Differences in grain orientation spread (GOS) between grains serve as the driving force for AGG. The abnormal enlargement of grains coincides with the expansion of twin boundaries (TB). Sigma 3n (n = 1, 2 and 3) boundaries play an indispensable role in the formation and growth of ALGs. |
| 资助项目 | Liaoning S T Project[2023JH1/10400054] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001241607400001 |
| 出版者 | ELSEVIER |
| 资助机构 | Liaoning S T Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yuan, Chao |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiao, Shichang,Liu, Shuai,Li, Na,et al. Abnormal grain growth in the Ni-based wrought superalloy GH4698 bar during heat treatment[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,30:6563-6575. |
| APA | Qiao, Shichang.,Liu, Shuai.,Li, Na.,Gao, Xinyu.,Wen, Xin.,...&Yuan, Chao.(2024).Abnormal grain growth in the Ni-based wrought superalloy GH4698 bar during heat treatment.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,30,6563-6575. |
| MLA | Qiao, Shichang,et al."Abnormal grain growth in the Ni-based wrought superalloy GH4698 bar during heat treatment".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 30(2024):6563-6575. |
入库方式： OAI收割
来源：金属研究所
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