Anisotropic dynamic response of AlSi10Mg fabricated via laser powder bed fusion under plate impact

被引:6
作者
Zhang, N. B. [1 ]
Yang, K. [3 ]
Li, Y. C. [1 ]
Lin, Z. H. [1 ]
Cai, Y. [2 ]
Chai, H. W. [1 ]
Xie, H. L. [4 ]
Lu, L. [1 ]
Luo, S. N. [1 ]
机构
[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu, Sichuan, Peoples R China
[2] Peac Inst Multiscale Sci, Chengdu, Sichuan, Peoples R China
[3] Taiyuan Univ Sci & Technol, Sch Mat Sci & Engn, Taiyuan, Shanxi, Peoples R China
[4] Shanghai Adv Res Inst, Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai, Peoples R China
关键词
AlSi10Mg alloy; Laser powder bed fusion; Spall strength; Anisotropy; MECHANICAL-PROPERTIES; MELTED ALSI10MG; PROCESS OPTIMIZATION; STAINLESS-STEEL; ALLOY; MICROSTRUCTURE; BEHAVIOR; ALUMINUM; DAMAGE; PARTS;
D O I
10.1016/j.matchemphys.2023.128840
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effects of structural anisotropy on dynamic yield and spallation damage of an AlSi10Mg alloy manufactured via laser powder bed fusion are investigated via plate impact experiments along the build direction (BD) and the transverse direction (TD). Free surface velocity histories are measured to deduce its dynamic mechanical properties. The as-received and postmortem samples are characterized with scanning electron microscopy, metallograpic microscopy, electron backscatter diffraction and synchrotron X-ray computed tomography. The Hugoniot elastic limit for loading along TD is about 40% higher than that along BD, given the initial ⟨100⟩ parallel to BD texture. For spallation, voids prefer to nucleate at melt pool boundaries. Spall strength for loading along TD is about 18% higher than that along BD, as a result of higher critical stress for void nucleation and less nucleation sites due to the melt pool morphology. The damage evolution features are also correlated well with melt pool morphology and grain morphology within the pool interior, demonstrating the "ductile"interpool and "brittle"intrapool fracture modes for loading along BD and TD, respectively.
引用
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页数:10
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