Inhibiting creep in nanograined alloys with stable grain boundary networks
文献类型：期刊论文
| 作者 | Zhang, B. B.2; Tang, Y. G.2,3; Mei, Q. S.4; Li, X. Y.2; Lu, K.1,2 |
| 刊名 | SCIENCE
 |
| 出版日期 | 2022-11-11 |
| 卷号 | 378期号:6620页码:659-663 |
| ISSN号 | 0036-8075 |
| DOI | 10.1126/science.abq7739 |
| 通讯作者 | Li, X. Y.(xyli@imr.ac.cn) ; Lu, K.(lu@imr.ac.cn) |
| 英文摘要 | Creep, the time-dependent deformation of materials stressed below the yield strength, is responsible for a great number of component failures at high temperatures. Because grain boundaries (GBs) in materials usually facilitate diffusional processes in creep, eliminating GBs is a primary approach to resisting high-temperature creep in metals, such as in single-crystal superalloy turbo blades. We report a different strategy to inhibiting creep by use of stable GB networks. Plastic deformation triggered structural relaxation of high-density GBs in nanograined single-phased nickel-cobalt-chromium alloys, forming networks of stable GBs interlocked with abundant twin boundaries. The stable GB networks effectively inhibit diffusional creep processes at high temperatures. We obtained an unprecedented creep resistance, with creep rates of similar to 10(-7) per second under gigapascal stress at 700 degrees C (similar to 61% melting point), outperforming that of conventional superalloys. |
| 资助项目 | Ministry of Science and Technology of China[2017YFA0700700] ; Ministry of Science and Technology of China[2017YFA0204401] ; National Natural Science Foundation of China[51901226] ; Chinese Academy of Sciences |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000898883700015 |
| 出版者 | AMER ASSOC ADVANCEMENT SCIENCE |
| 资助机构 | Ministry of Science and Technology of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences |
| 源URL | [http://ir.imr.ac.cn/handle/321006/175826]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li, X. Y.; Lu, K. |
| 作者单位 | 1.Liaoning Acad Mat, Shenyang 110004, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, B. B.,Tang, Y. G.,Mei, Q. S.,et al. Inhibiting creep in nanograined alloys with stable grain boundary networks[J]. SCIENCE,2022,378(6620):659-663. |
| APA | Zhang, B. B.,Tang, Y. G.,Mei, Q. S.,Li, X. Y.,&Lu, K..(2022).Inhibiting creep in nanograined alloys with stable grain boundary networks.SCIENCE,378(6620),659-663. |
| MLA | Zhang, B. B.,et al."Inhibiting creep in nanograined alloys with stable grain boundary networks".SCIENCE 378.6620(2022):659-663. |
入库方式： OAI收割
来源：金属研究所
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