Micro-hardness and strain-rate-dependent compressive response of an ultra-light-weight Mg-Li-Al alloy
文献类型：期刊论文
| 作者 | Li, Haoyang1; Shao, Chenwei3; Rojas, David Funes2; Ponga, Mauricio2; Hogan, James D.1 |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2021-01-15 |
| 卷号 | 890页码:15 |
| 关键词 | Mg-Li-Al Ultra-light-weight XPS Strain-rate-dependent uniaxial compression SHPB Micro-hardness Compressive strength Failure mechanisms |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2021.161703 |
| 通讯作者 | Li, Haoyang(haoyang@ualberta.ca) ; Ponga, Mauricio(mponga@mech.ubc.ca) |
| 英文摘要 | A study on the microstructure and composition, micro-hardness and strain-rate-dependent compressive behaviors, and the associated failure mechanisms of an ultra-light-weight Mg-Li-Al alloy were conducted. X-ray diffraction and X-ray photoelectron spectroscopy showed a multi-phase material with similar to 35 wt% Li and similar to 20 wt% Al, and a dendritic "fishbone" microstructure resulted from the high percentage of both Li and Al. Micro-indentation measurements showed a superior hardness (1.63 +/- 0.08 GPa) that is > 1.5x higher than other Mg-Li-Al alloys reported in the literature, with a low density (similar to 1.68 g/cm(3)) comparable to Mg alloys. Strain-rate-dependent uniaxial compression experiments demonstrated no strain-rate-sensitivity in the peak strength (699.4 +/- 74.0 MPa) at strain rates between 10(-5) and 10(3) s(-1). High-speed imaging revealed a shear-mode brittle fracture under both quasi-static and dynamic conditions, with an additional splitting crack mechanism observed under dynamic loading. Crack propagation speeds demonstrated a positive correlation with strain rate from similar to 480 m/s at similar to 100 s(-1) to similar to 1000 m/s at similar to 2000 s(-1). Post-mortem analysis showed that the "fishbone" structure with a peeling fracture mechanism appears to be the dominant site promoting shear failure across all strain rates. (C) 2021 Elsevier B.V. All rights reserved. |
| 资助项目 | Innovation for Defence Excellence and Security (IDEaS) program of Canada[W7714-217552/001/] ; Natural Sciences and Engineering Research Council of Canada (NSERC)[2016-04685] ; Natural Sciences and Engineering Research Council of Canada (NSERC)[2016-06114] ; Department of Mechanical Engineering at the University of British Columbia |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000705467400001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | Innovation for Defence Excellence and Security (IDEaS) program of Canada ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Department of Mechanical Engineering at the University of British Columbia |
| 源URL | [http://ir.imr.ac.cn/handle/321006/166529]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li, Haoyang; Ponga, Mauricio |
| 作者单位 | 1.Univ Alberta, Dept Mech Engn, Edmonton, AB T6G 2R3, Canada 2.Univ British Columbia, Dept Mech Engn, Vancouver Campus, Vancouver, BC V5Z 1L4, Canada 3.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Haoyang,Shao, Chenwei,Rojas, David Funes,et al. Micro-hardness and strain-rate-dependent compressive response of an ultra-light-weight Mg-Li-Al alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,890:15. |
| APA | Li, Haoyang,Shao, Chenwei,Rojas, David Funes,Ponga, Mauricio,&Hogan, James D..(2021).Micro-hardness and strain-rate-dependent compressive response of an ultra-light-weight Mg-Li-Al alloy.JOURNAL OF ALLOYS AND COMPOUNDS,890,15. |
| MLA | Li, Haoyang,et al."Micro-hardness and strain-rate-dependent compressive response of an ultra-light-weight Mg-Li-Al alloy".JOURNAL OF ALLOYS AND COMPOUNDS 890(2021):15. |
入库方式： OAI收割
来源：金属研究所
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