Mechanical behavior and response mechanism of porous metal structures manufactured by laser powder bed fusion under compressive loading

Xuanming Cai; Yang Hou; Wei Zhang; Zhiqiang Fan; Yubo Gao; Junyuan Wang; Heyang Sun; Zhujun Zhang; Wenshu Yang

doi:10.1007/s12613-024-2865-0

Volume 31 Issue 4

Apr. 2024

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2024 > 31(4): 737-749

Xuanming Cai, Yang Hou, Wei Zhang, Zhiqiang Fan, Yubo Gao, Junyuan Wang, Heyang Sun, Zhujun Zhang, and Wenshu Yang, Mechanical behavior and response mechanism of porous metal structures manufactured by laser powder bed fusion under compressive loading, Int. J. Miner. Metall. Mater., 31(2024), No. 4, pp. 737-749. https://doi.org/10.1007/s12613-024-2865-0

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Xuanming Cai, Yang Hou, Wei Zhang, Zhiqiang Fan, Yubo Gao, Junyuan Wang, Heyang Sun, Zhujun Zhang, and Wenshu Yang, Mechanical behavior and response mechanism of porous metal structures manufactured by laser powder bed fusion under compressive loading, Int. J. Miner. Metall. Mater., 31(2024), No. 4, pp. 737-749. https://doi.org/10.1007/s12613-024-2865-0

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Research Article

Mechanical behavior and response mechanism of porous metal structures manufactured by laser powder bed fusion under compressive loading

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Corresponding authors:
Xuanming Cai E-mail: caixm@nuc.edu.cn

Wenshu Yang E-mail: yws001003@163.com
Received: 30 November 2023; Revised: 17 January 2024; Accepted: 26 February 2024; Available online: 27 February 2024

Abstract

Abstract

AlSi10Mg porous protective structure often produces different damage forms under compressive loading, and these damage modes affect its protective function. In order to well meet the service requirements, there is an urgent need to comprehensively understand the mechanical behavior and response mechanism of AlSi10Mg porous structures under compressive loading. In this paper, AlSi10Mg porous structures with three kinds of volume fractions are designed and optimized to meet the requirements of high-impact, strong-energy absorption, and lightweight characteristics. The mechanical behaviors of AlSi10Mg porous structures, including the stress–strain relationship, structural bearing state, deformation and damage modes, and energy absorption characteristics, were obtained through experimental studies at different loading rates. The damage pattern of the damage section indicates that AlSi10Mg porous structures have both ductile and brittle mechanical properties. Numerical simulation studies show that the AlSi10Mg porous structure undergoes shear damage due to relative misalignment along the diagonal cross-section, and the damage location is almost at 45° to the load direction, which is the most direct cause of its structural damage, revealing the damage mechanism of AlSi10Mg porous structures under the compressive load. The normalized energy absorption model constructed in the paper well interprets the energy absorption state of AlSi10Mg porous structures and gives the sensitive location of the structures, and the results of this paper provide important references for peers in structural design and optimization.
- AlSi10Mg;
- additive manufacture;
- energy absorption characteristics;
- damage by deformation;
- mechanical behavior

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