Mechanical properties and microstructure of the Al0.3CoCrFeNiTi0.3 high entropy alloy under dynamic compression
文献类型：期刊论文
| 作者 | Zhong, Xianzhe1; Zhang, Qingming1; Xie, Jing1; Wu, Mingze1; Jiang, Fuqing2; Yan, Yongming1; Wang, Zhiwei1 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2021-04-22 |
| 卷号 | 812页码:11 |
| 关键词 | High-entropy alloy Dynamic loading Mechanical properties Dislocation structures Constitutive model |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2021.141147 |
| 通讯作者 | Zhang, Qingming(qmzhang@bit.edu.cn) |
| 英文摘要 | In this work, the mechanical properties and corresponding microstructural evolution of the as-cast Al0.3CoCrFeNiTi0.3 high-entropy alloy (HEA) under quasi-static and dynamic compressive loadings were investigated. The HEA consisted of FCC/L12 + BCC/B2 mixed solutions exhibited a good combination of high strength and large ductility upon quasi-static loading, which is mainly due to the strengthening effect of coherent L12-nanoparticles. The HEA exhibited a significant positive strain rate effect, and its yield strength rised from 810 to 1181 MPa when the strain rate increased from 10-3 to 4700 s-1. Compared with the quasi-static condition, the density of stacking fault (SF) networks and immobile Lomer?Cottrell (L-C) locks were greater under dynamic loading. Furthermore, the deformation mode of the HEA was dominated by planar glide under high strain rate loading, and the dislocation substructure showed Taylor lattice, high-density dislocation walls and intersected microbands with the increase of strain. The dynamic Hall?Petch and microband-induced plasticity effects could be responsible for the excellent dynamic compressive properties. Fractographic observations indicated that the fracture of the HEA is controlled by the mixed ductile-brittle mechanism under dynamic compressive loading. An improved Johnson-Cook (J-C) constitutive model considering adiabatic temperature rise was employed to predict the plastic flow behavior of the HEA under dynamic conditions and the improved J-C model was in good agreement with the experimental results. |
| 资助项目 | National Key R&D Program of China[2016YFC0801204] ; Civil Aerospace Pre Research Project[D020304] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000639101200002 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Key R&D Program of China ; Civil Aerospace Pre Research Project |
| 源URL | [http://ir.imr.ac.cn/handle/321006/162353]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, Qingming |
| 作者单位 | 1.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhong, Xianzhe,Zhang, Qingming,Xie, Jing,et al. Mechanical properties and microstructure of the Al0.3CoCrFeNiTi0.3 high entropy alloy under dynamic compression[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,812:11. |
| APA | Zhong, Xianzhe.,Zhang, Qingming.,Xie, Jing.,Wu, Mingze.,Jiang, Fuqing.,...&Wang, Zhiwei.(2021).Mechanical properties and microstructure of the Al0.3CoCrFeNiTi0.3 high entropy alloy under dynamic compression.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,812,11. |
| MLA | Zhong, Xianzhe,et al."Mechanical properties and microstructure of the Al0.3CoCrFeNiTi0.3 high entropy alloy under dynamic compression".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 812(2021):11. |
入库方式： OAI收割
来源：金属研究所
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