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
收稿日期: 2024-04-23
修回日期: 2024-05-18
网络出版日期: 2024-05-28
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)
Effect of Annealing Heat Treatment on the Macroscopic and Microscopic Deformation Behavior of Additively Manufactured AlSi10Mg Alloy
Received date: 2024-04-23
Revised date: 2024-05-18
Online published: 2024-05-28
Supported by
National Key Research and Development Program of China(2023YFA1609202);Beamtime at PETRA III for the Proposal(H-20010018)
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
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 . DOI: 10.11900/0412.1961.2024.00116
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.
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