| Improving dynamic tensile strength without sacrifice of final elongation in aluminum by gradient microstructures | |
Cai SL(蔡松林)1 ; Wu, S2; Ding G(丁淦)1; Liu, Y2; Dai LH(戴兰宏)1,3; Gu, J4; Jiang MQ(蒋敏强)1,3
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| Corresponding Author | Cai, S. L.([email protected]) ; Jiang, M. Q.([email protected]) |
| Source Publication | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
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| 2024-09-01 | |
| Volume | 32Pages:1658-1671 |
| ISSN | 2238-7854 |
| Abstract | Gradient microstructures (GMs) help to improve simultaneously the strength and ductility of metallic materials; therefore, GMs have attracted more and more interest in recent years. The current researches on GMed metals mainly focus on the quasi-static mechanical properties, whereas the dynamic mechanical behavior of GMed metals remains mysterious. Here, GMed pure aluminum was prepared by cryogenic pre-torsion. Split Hopkinson tensile bar (SHTB) tests show that GMs can improve the dynamic tensile strength without the sacrifice of final elongation. Quantitative microstructural characterization indicates that the gradients of dislocation density, grain size and precipitate volume fraction contribute to the excellent dynamic mechanical properties in GMed aluminum. A modified Johnson-Cook model based on multiple GMs was proposed to describe the dynamic mechanical behavior of GMed metallic materials. Systematical finite element simulations were further conducted to reveal the underlying mechanisms during SHTB tests of GMed aluminum bar. The gradient of yield flow stress contributes the improvement of dynamic tensile strength. The extra hardening from multiple GMs and the occurrence of dynamic recrystallization (DRX) promote the increase of final elongation. |
| Keyword | Gradient microstructure Split Hopkinson tensile bar Aluminum Finite element model High strength |
| DOI | 10.1016/j.jmrt.2024.08.025 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001293623600001 |
| WOS Keyword | MECHANICAL-PROPERTIES ; TI-6AL-4V ALLOY ; RECRYSTALLIZATION KINETICS ; FLOW BEHAVIOR ; STRAIN ; STEEL ; DEFORMATION ; STRESS ; COMPRESSION ; EXTRUSION |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | National Natural Science Foundation of China[12072327] ; National Natural Science Foundation of China[12302497] ; China Electric Power Research Institute[GC80-21-002] ; CAS Project for Young Scientists in Basic Research[YSBR-096] ; One Hundred Talents Program of Chinese Academy of Sciences (CAS) |
| Funding Organization | National Natural Science Foundation of China ; China Electric Power Research Institute ; CAS Project for Young Scientists in Basic Research ; One Hundred Talents Program of Chinese Academy of Sciences (CAS) |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Cai, S. L. ; Jiang, M. Q. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96353 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 4.China Elect Power Res Inst, Beijing 100192, Peoples R China |
| Recommended Citation GB/T 7714 | Cai SL,Wu, S,Ding G,et al. Improving dynamic tensile strength without sacrifice of final elongation in aluminum by gradient microstructures[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,32:1658-1671.Rp_Au:Cai, S. L., Jiang, M. Q. |
| APA | 蔡松林.,Wu, S.,丁淦.,Liu, Y.,戴兰宏.,...&蒋敏强.(2024).Improving dynamic tensile strength without sacrifice of final elongation in aluminum by gradient microstructures.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,32,1658-1671. |
| MLA | 蔡松林,et al."Improving dynamic tensile strength without sacrifice of final elongation in aluminum by gradient microstructures".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 32(2024):1658-1671. |
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