On the exceptional damage-tolerance of gradient metallic materials
文献类型：期刊论文
| 作者 | Cao, Ruqing1,4; Yu, Qin3; Pan, Jie1; Lin, Yan1; Sweet, Andrew2,3; Li, Yi1; Ritchie, Robert O.2,3 |
| 刊名 | MATERIALS TODAY
 |
| 出版日期 | 2020 |
| 卷号 | 32页码:94-107 |
| ISSN号 | 1369-7021 |
| DOI | 10.1016/j.mattod.2019.09.023 |
| 通讯作者 | Li, Yi(liyi@imr.ac.cn) ; Ritchie, Robert O.(roritchie@lbl.gov) |
| 英文摘要 | An experimental study is described on the fracture toughness and micro-mechanisms associated with the initiation and propagation of cracks in metallic nickel containing marked gradients in grain size, ranging from similar to 30 nm to similar to 4 mu m. Specifically, cracks are grown in a gradient structured (GS) nickel with grain-size gradient ranging from the coarse macro-scale to nano-scale (CG -> NG) and vice versa (NG -> CG), with the measured crack-resistance R-curves compared to the corresponding behavior in uniform nano-grained (NG) and coarse-grained (CG) materials. It is found that the gradient structures display a much-improved combination of high strength and toughness compared to uniform grain-sized materials. However, based on J-integral measurements in the gradient materials, the crack-initiation toughness is far higher for cracks grown in the direction of the coarse-to-nano grained gradient than vice versa, a result which we ascribe primarily to excessive crack-tip blunting in the coarse-grained microstructure. Both gradient structures, however, display marked rising R-curve behavior with exceptional crack-growth toughnesses exceeding 200 MPa.m(1/2). |
| 资助项目 | U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division[DE-AC02-05-CH11231] ; National Key Research and Development Program of China[2017YFB0702003] ; National Natural Science Foundation of China[51471165] ; Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy[DE-AC02-05CH11231] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000514670500028 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy |
| 源URL | [http://ir.imr.ac.cn/handle/321006/137618]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li, Yi; Ritchie, Robert O. |
| 作者单位 | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Lawrence Berkeley Natl Lab, Dept Mat Sci & Engn, Berkeley, CA 94720 USA 3.Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Ruqing,Yu, Qin,Pan, Jie,et al. On the exceptional damage-tolerance of gradient metallic materials[J]. MATERIALS TODAY,2020,32:94-107. |
| APA | Cao, Ruqing.,Yu, Qin.,Pan, Jie.,Lin, Yan.,Sweet, Andrew.,...&Ritchie, Robert O..(2020).On the exceptional damage-tolerance of gradient metallic materials.MATERIALS TODAY,32,94-107. |
| MLA | Cao, Ruqing,et al."On the exceptional damage-tolerance of gradient metallic materials".MATERIALS TODAY 32(2020):94-107. |
入库方式： OAI收割
来源：金属研究所
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