ZrO2-GNPs双相协同增强2024Al激光增材制造性能调控与强韧化机制研究
结题报告
批准号:
52005391
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
陈祯
依托单位:
学科分类:
成形制造
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
陈祯
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中文摘要
本项目针对新一代航天飞行器对高强韧、轻量化材料和复杂异形薄壁构件整体化、结构功能一体化制造的需求,以2024Al高强铝合金为基体,以ZrO2-GNPs双相纳米颗粒作为协同增强相,开发一种新型铝基纳米复合材料。利用ZrO2-GNPs纳米颗粒和界面反应生成的Al3C4,提高基体的异质形核率,改善熔体凝固模式,使得择优生长的柱状晶向等轴晶转变,细化晶粒,抑制热裂倾向。同时,利用SLM成形过程中的高冷却速度(~10^8 K/s)和Marangoni对流,改善增强相与基体的湿润性,提高界面结合强度,实现增强相在晶界和晶内的均匀分布,提高材料的强韧性。系统研究复合材料界面形成与作用机制、瞬态非平衡凝固条件下的组织演化机理以及强韧化机制,突破ZrO2-GNPs/2024Al复合材料增材制造形性调控和强韧化技术瓶颈,有望为新一代航天飞行器减重、提质增效提供高强韧新型复合材料和一体化增材制造技术。
英文摘要
Aiming at the requirements of the new generation aerospace vehicle for the high-strength and toughness, lightweight materials, as well as for the integrated manufacturing of complex and heterogeneous thin-walled components with a combination of structure and function, an aluminum matrix nanocomposites with ZrO2-GNPs dual-phase nanoparticles as a synergistic reinforcing phase and a 2024Al high-strength aluminum alloy as the matrix is designed. ZrO2-GNPs dual-phase nanoparticles, and the Al3C4 generated through the interfacial reaction between Al matrix and GNPs as an adequate heterogeneous nucleating agent improves the melt solidification mode, transforms epitaxial columnar crystals into equiaxed crystals, improves grain refinement and inhibits the tendency of solidification cracking and hot tearing. The rapid cooling rate (~10^8 K/s) and intrinsic Marangoni convection of SLM process play important roles in homogeneous dispersion of nanoparticles along grain boundaries and in grains, which promotes better wetting and good interfacial bonding between nanoparticles and Al matrix, thus improving the strength and ductility of the Al-matrix material. The interfacial formation and reaction mechanism between 2024Al matrix and ZrO2-GNPs nanocomposites and mechanism of microstructure evolution under transient nonequilibrium solidification, as well as the strengthening and toughening mechanism of the ZrO2-GNPs/2024Al composites are systematically studied. This proposal is expected to break through the bottlenecks of shape and performance control, and toughening of high-strength aluminum matrix composites during additive manufacturing, providing a new composite material with high strength and toughness and integrated additive manufacturing technology for the new generation of space vehicles to reduce weight, improve quality and efficiency.
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DOI:10.1016/j.mtcomm.2021.103009
发表时间:2021-11
期刊:Materials Today Communications
影响因子:3.8
作者:Shuzhe Zhang;Zhen Chen;Pei Wei;Wenjie Liu;Y. Zou;Y. Lei;Sen Yao;Si-Wei Zhang;B. Lu
通讯作者:Shuzhe Zhang;Zhen Chen;Pei Wei;Wenjie Liu;Y. Zou;Y. Lei;Sen Yao;Si-Wei Zhang;B. Lu
DOI:10.3390/met13020268
发表时间:2023
期刊:Metals
影响因子:2.9
作者:Sen Yao;Jiajian Wang;Min Li;Zhen Chen;Bingheng Lu;Song Shen;Yao Li
通讯作者:Yao Li
DOI:10.1016/j.jmrt.2022.08.004
发表时间:2022-08
期刊:Journal of Materials Research and Technology
影响因子:--
作者:Min Li;Sen Yao;Jiajian Wang;Z. Chen;Guifeng Zhang;Shuzhe Zhang;Y. Li
通讯作者:Min Li;Sen Yao;Jiajian Wang;Z. Chen;Guifeng Zhang;Shuzhe Zhang;Y. Li
DOI:10.1016/j.msea.2022.142792
发表时间:2022-02
期刊:Materials Science and Engineering: A
影响因子:--
作者:Shuzhe Zhang;Zhen Chen;Pei Wei;Ke Huang;Y. Zou;Sen Yao;Min Li;B. Lu;J. Xing
通讯作者:Shuzhe Zhang;Zhen Chen;Pei Wei;Ke Huang;Y. Zou;Sen Yao;Min Li;B. Lu;J. Xing
国内基金
海外基金