Evolution of microstructure and mechanical property during long-term aging in Udimet 720Li
文献类型：期刊论文
| 作者 | L. H. Zhou ; V. Lupinc ; J. T. Guo |
| 刊名 | Journal of Materials Science & Technology
 |
| 出版日期 | 2001 |
| 卷号 | 17期号:6页码:633-637 |
| 关键词 | gamma' |
| ISSN号 | 1005-0302 |
| 中文摘要 | Thermal stabilities of microstructure and mechanical property have been investigated on superalloy U720Li, which is of great interest of application for jet engine and land-based turbine disc. The results showed that, the primary and secondary gamma' particles maintain good thermal stability at 650 and 700 degreesC with aging time up to 3000 h, while the tertiary gamma' is apparently dependent on aging temperature and time. The tertiary gamma' particles undergo a procedure of coarsening, dissolution and eventually complete disappearance with the increasing of aging time and temperature. They exhibit unusual high sensibility upon aging temperature, which is attributed to the lattice misfit between the gamma' precipitates and the matrix in the alloy. The grain boundary phase M23C6 remains stable without forming of sigma phase even with aging time up to 3000 h at 700 degreesC. Microhardness decreases apparently with increasing aging time and aging temperature. Theoretical analysis based on dislocation mechanism indicates that the change of microhardness should be attributed to the evolution of the tertiary gamma' during aging. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36955]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. H. Zhou,V. Lupinc,J. T. Guo. Evolution of microstructure and mechanical property during long-term aging in Udimet 720Li[J]. Journal of Materials Science & Technology,2001,17(6):633-637. |
| APA | L. H. Zhou,V. Lupinc,&J. T. Guo.(2001).Evolution of microstructure and mechanical property during long-term aging in Udimet 720Li.Journal of Materials Science & Technology,17(6),633-637. |
| MLA | L. H. Zhou,et al."Evolution of microstructure and mechanical property during long-term aging in Udimet 720Li".Journal of Materials Science & Technology 17.6(2001):633-637. |
入库方式： OAI收割
来源：金属研究所
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