梯度锌含量和多尺度粒子对粗/细晶耦合分布Al–Zn–Mg–Cu合金力学性能的协同影响

袁亮亮; 郭明星; 王义; 王赟; 庄林忠

doi:10.1007/s12613-024-2871-2

Volume 31 Issue 6

Jun. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(6): 1392-1405

Liangliang Yuan, Mingxing Guo, Yi Wang, Yun Wang, and Linzhong Zhuang, Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al–Zn–Mg–Cu alloys with coupling distribution of coarse–fine grains, Int. J. Miner. Metall. Mater., 31(2024), No. 6, pp. 1392-1405. https://doi.org/10.1007/s12613-024-2871-2

Cite this article as:

Liangliang Yuan, Mingxing Guo, Yi Wang, Yun Wang, and Linzhong Zhuang, Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al–Zn–Mg–Cu alloys with coupling distribution of coarse–fine grains, Int. J. Miner. Metall. Mater., 31(2024), No. 6, pp. 1392-1405. https://doi.org/10.1007/s12613-024-2871-2

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研究论文

梯度锌含量和多尺度粒子对粗/细晶耦合分布Al–Zn–Mg–Cu合金力学性能的协同影响

1)
航天飞行器生存技术与效能评估实验室, 北京 100085, 中国
2)
北京科技大学新金属材料国家重点实验室, 北京 100083, 中国
3)
北京科技大学北京材料基因工程高精尖创新中心, 北京 100083, 中国
4)
北京科技大学现代交通金属材料与加工实验室, 北京 100083, 中国

通讯作者:
袁亮亮    E-mail: liangliang_yuan@163.com

郭明星    E-mail: mingxingguo@skl.ustb.edu.cn

庄林忠    E-mail: linzhongzhuang@163.com

文章亮点

(1) 系统研究了梯度锌含量与多尺度富铁相协同影响再结晶组织和织构演化规律；

(2) 基于粗/细晶耦合调控，新型高强度Al–8.0Zn–1.5Mg–1.5Cu–0.2Fe合金预时效态平均塑性应变比可达0.708；

(3) 揭示了多尺度第二相颗粒的演化和影响机制，以及粗/细晶耦合分布铝合金对应的高成形性作用机制。

中文摘要

高强度Al–Zn–Mg–Cu合金有望应用于车身结构件，然而，其室温冲压成形性能仍有待提高。为此，本论文设计了具有梯度Zn含量的Al–Zn–Mg–Cu系合金，系统研究了梯度Zn含量对沉淀相、富铁相以及晶粒组织结构演化的影响规律，开发出了兼具高强度和高成形性新型Al–8.0Zn–1.5Mg–1.5Cu–0.2Fe。研究结果表明，随Zn含量增加，更容易形成多尺度沉淀相和富铁相的耦合分布特征，进而诱发形成由粗/细晶交替分布的胞状组织，最终使得该合金在高强度状态下表征冲压成形性能的平均塑性应变比达0.708。基于组织性能表征，本文揭示了合金内多尺度弥散粒子形成和影响作用机制。所开发的多过程耦合控制方法在有效提高Al–Zn–Mg–Cu系高强度合金的室温冲压成形性能方面潜力巨大。

关键词:

Research Article

Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al–Zn–Mg–Cu alloys with coupling distribution of coarse–fine grains

+ Author Affiliations

1)
Institute of Effectiveness Evaluation of Flying Vehicle, Beijing 100085, China
2)
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
3)
Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
4)
Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing 100083, China

Linzhong Zhuang is an editorial board member for this journal and was not involved in the editorial review or the decision to publish this article. All authors do not have competing interests to declare.

Corresponding authors:
Liangliang Yuan    E-mail: liangliang_yuan@163.com

Mingxing Guo    E-mail: mingxingguo@skl.ustb.edu.cn

Linzhong Zhuang    E-mail: linzhongzhuang@163.com
Received: 1 August 2023; Revised: 28 February 2024; Accepted: 29 February 2024; Available online: 1 March 2024

Abstract

Abstract

This study investigated the influence of graded Zn content on the evolution of precipitated and iron-rich phases and grain structure of the alloys, designed and developed the Al–8.0Zn–1.5Mg–1.5Cu–0.2Fe (wt%) alloy with high strength and formability. With the increase of Zn content, forming the coupling distribution of multiscale precipitates and iron-rich phases with a reasonable matching ratio and dispersion distribution characteristics is easy. This phenomenon induces the formation of cell-like structures with alternate distribution of coarse and fine grains, and the average plasticity–strain ratio (characterizing the formability) of the pre-aged alloy with a high strength is up to 0.708. Results reveal the evolution and influence mechanisms of multiscale second-phase particles and the corresponding high formability mechanism of the alloys. The developed coupling control process exhibits considerable potential, revealing remarkable improvements in the room temperature formability of high-strength Al–Zn–Mg–Cu alloys.
- Al–Zn–Mg–Cu alloy;
- iron-rich phase;
- high formability;
- microstructure;
- mechanisms

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