退火热处理对增材制造<strong>AlSi10Mg</strong>合金宏观和微观变形行为的影响

doi:10.11900/0412.1961.2024.00116

金属学报

2024, Vol. 60

Issue (8): 1091-1099 DOI: 10.11900/0412.1961.2024.00116

研究论文

本期目录 | 过刊浏览

退火热处理对增材制造AlSi10Mg合金宏观和微观变形行为的影响

张星星¹(

), LUTZ Andreas², 甘为民³, MAAWAD Emad³, KRIELE Armin⁴

1 中国科学院高能物理研究所多学科研究中心北京 100049
2 Mercedes Benz AG, Research and Development Department, Leibnizstr. 2, 71032 Böblingen, Germany
3 Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502 Geesthacht, Germany
4 German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Hereon, 85748 Garching, Germany

Effect of Annealing Heat Treatment on the Macroscopic and Microscopic Deformation Behavior of Additively Manufactured AlSi10Mg Alloy

ZHANG Xingxing¹(

), LUTZ Andreas², GAN Weimin³, MAAWAD Emad³, KRIELE Armin⁴

1 Multi-disciplinary Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2 Mercedes Benz AG, Research and Development Department, Leibnizstr. 2, 71032 Böblingen, Germany
3 Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502 Geesthacht, Germany
4 German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Hereon, 85748 Garching, Germany

引用本文:

张星星, LUTZ Andreas, 甘为民, MAAWAD Emad, KRIELE Armin. 退火热处理对增材制造AlSi10Mg合金宏观和微观变形行为的影响[J]. 金属学报, 2024, 60(8): 1091-1099.
Xingxing ZHANG, Andreas LUTZ, Weimin GAN, Emad MAAWAD, Armin KRIELE. Effect of Annealing Heat Treatment on the Macroscopic and Microscopic Deformation Behavior of Additively Manufactured AlSi10Mg Alloy[J]. Acta Metall Sin, 2024, 60(8): 1091-1099.

全文: PDF(2507 KB) HTML

摘要:

增材制造AlSi10Mg合金存在显著的残余应力，对零件的形状尺寸精度、服役安全性和抗腐蚀性能等产生不利影响。在实际应用中，对残余应力敏感的应用需采用去应力退火以消除残余应力。然而，目前对增材制造AlSi10Mg合金退火后力学特性的理解还停留在宏观层面。为了更深入地揭示其微观力学行为与内在机制，本工作利用同步辐射X射线衍射技术，对合金进行原位变形研究，分析Al和Si相的晶格应变应力演化，明确各物相对合金加工硬化率的具体贡献，并对位错密度的演变进行了量化分析，从而阐明了退火热处理对增材制造AlSi10Mg合金载荷传递行为与位错行为的影响。

关键词 ：同步辐射X射线衍射, 原位变形, 增材制造, AlSi10Mg合金, 热处理

Abstract：

The additively manufactured AlSi10Mg alloy demonstrates considerable residual stresses, adversely affecting the dimensional accuracy, operational safety, and corrosion resistance of the parts. In practical applications, stress relief annealing is necessary to eliminate residual stresses in residual stress-sensitive applications. However, the current understanding of the mechanical properties of the additively manufactured AlSi10Mg alloy after annealing is still limited to the macroscopic level. To further investigate the micromechanical behavior and intrinsic mechanisms of the alloy, this study employed synchrotron X-ray diffraction technology to conduct in situ deformation analysis. This study thoroughly examined the lattice strain and stress evolutions of the Al and Si phases and clarified the individual contribution of each phase to the strain hardening rate of the alloy. In addition, this study quantitatively assessed the evolution of dislocation density and elucidated the influences of annealing heat treatment on the load transfer and dislocation behavior of the additively manufactured AlSi10Mg alloy.

Key words： synchrotron X-ray diffraction in situ deformation additive manufacturing AlSi10Mg alloy heat treatment

收稿日期: 2024-04-23

ZTFLH:

TB146.2

基金资助:国家重点研发计划项目(2023YFA1609202);DESY PETRA III同步辐射机时项目(H-20010018)

通讯作者: 张星星，xxzhang@ihep.ac.cn，主要从事金属材料的大科学装置表征与计算模拟研究

Corresponding author: ZHANG Xingxing, associate professor, Tel: (010)88233581, E-mail: xxzhang@ihep.ac.cn

作者简介: 张星星，男，1984年生，副研究员，博士

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https://www.ams.org.cn/CN/10.11900/0412.1961.2024.00116 或 https://www.ams.org.cn/CN/Y2024/V60/I8/1091

图1 原位变形实验试样尺寸

图2 打印态和退火态试样的宏观力学行为

图3 打印态试样和退火态试样显微组织的SEM像

图4 打印态和退火态试样Al基体和Si相的{hkl}晶格应变演化

表1 变形过程中晶格应变的最大误差 (10-6)

图5 打印态退火态样品Al基体和Si相的不同{hkl}晶格的应力演化

图6 打印态和退火态合金中Al基体的位错密度演化

图7 Al和Si两相对合金加工硬化率的贡献(这里重新绘制了图2b中的合金数据用于对比)

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