Hierarchical microstructures enabled excellent low-temperature strength-ductility synergy in bulk pure tungsten
文献类型：期刊论文
| 作者 | Xie, X. F.1,2; Xie, Z. M.1; Liu, R.1 ; Fang, Q. F.1; Liu, C. S.1; Han, Wei-Zhong3; Wu, Xuebang1
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| 刊名 | ACTA MATERIALIA
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| 出版日期 | 2022-04-15 |
| 卷号 | 228 |
| ISSN号 | 1359-6454 |
| 关键词 | Tungsten Microstructure Dislocations Strengthening Ductilizing |
| DOI | 10.1016/j.actamat.2022.117765 |
| 通讯作者 | Xie, Z. M.(zmxie@issp.ac.cn) ; Wu, Xuebang(xbwu@issp.ac.cn) |
| 英文摘要 | A B S T R A C T Refractory tungsten (W) is notoriously brittle at room temperature, which restricts its workability and narrows the temperature range of critical applications. Here, we report a multi-scale microstructure modulation strategy to achieve an excellent combination of low-temperature ductility and high strength in bulk pure W. Through fast two-step low temperature sintering of the activated W powders and highenergy-rate forging treatments, unique hierarchical microstructures were constructed in pure W, including lamellar elongated matrix grains, with profuse interior fine sub-grains, and high density of mobile edge and mixed dislocations. At room temperature, the hierarchical structured bulk W exhibits a detectable tensile ductility and an ultimate tensile strength (UTS) of 1.35 GPa. The high strength can be maintained at elevated temperatures, i.e., UTS > 1.0 GPa at 200 degrees C; it also has a remarkable tensile ductility of 15.3% at this temperature. These properties are significantly better than those reported in bulk pure W and W alloys with second phase particles. The shielding and blunting effects from low-angle grain boundaries and highly mobile dislocations, and the lamellar structure reaped delamination toughening effect are the main mechanisms for the improved low-temperature ductility and strength. This study demonstrates a practical route to achieve attractive low-temperature strength-ductility synergy in bulk W without involving any alloying elements, and it is a feasible and low-cost pathway to design high performance refractory metals and alloys.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| WOS关键词 | GRAIN-BOUNDARY SEGREGATION ; MECHANICAL-PROPERTIES ; TENSILE PROPERTIES ; THERMAL-STABILITY ; EDGE DISLOCATION ; BEHAVIOR ; ALLOYS ; TRANSITION ; DEFORMATION ; FRACTURE |
| 资助项目 | National Key Research and Development Program of China[2019YFE03110200] ; National Key Research and Development Program of China[2017YFE0302400] ; National Key Research and Development Program of China[2017YFA0402800] ; National Key Research and Development Program of China[2019YFE03120001] ; National Natural Science Foundation of China[11735015] ; National Natural Science Foundation of China[51801203] ; National Natural Science Foundation of China[52171084] ; National Natural Science Foundation of China[52173303] ; Anhui Provincial Natural Science Foundation[1908085J17] ; HIRFL User Project[HIR19PY006] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000789648200002 |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation ; HIRFL User Project |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/131527]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xie, Z. M.; Wu, Xuebang |
| 作者单位 | 1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, X. F.,Xie, Z. M.,Liu, R.,et al. Hierarchical microstructures enabled excellent low-temperature strength-ductility synergy in bulk pure tungsten[J]. ACTA MATERIALIA,2022,228. |
| APA | Xie, X. F..,Xie, Z. M..,Liu, R..,Fang, Q. F..,Liu, C. S..,...&Wu, Xuebang.(2022).Hierarchical microstructures enabled excellent low-temperature strength-ductility synergy in bulk pure tungsten.ACTA MATERIALIA,228. |
| MLA | Xie, X. F.,et al."Hierarchical microstructures enabled excellent low-temperature strength-ductility synergy in bulk pure tungsten".ACTA MATERIALIA 228(2022). |
入库方式： OAI收割
来源：合肥物质科学研究院
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