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Revealing the strengthening contribution of stacking faults, dislocations and grain boundaries in severely deformed LPBF AlSi10Mg alloy.

作者信息

Snopiński Przemysław, Kotoul Michal, Petruška Jindřich, Rusz Stanislav, Żaba Krzysztof, Hilšer Ondřej

机构信息

Department, of Engineering Materials and Biomaterials, Silesian University of Technology, 18A Konarskiego Street, 44-100, Gliwice, Poland.

Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno University of Technology, Technická 2896/2, 616 69, Brno, Czech Republic.

出版信息

Sci Rep. 2023 Sep 27;13(1):16166. doi: 10.1038/s41598-023-43448-5.

DOI:10.1038/s41598-023-43448-5
PMID:37759080
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10533813/
Abstract

In this study, microstructural features direct metal laser melted (DMLM) aluminium-silicon-magnesium (AlSi10Mg) are investigated using advanced transmission electron microscopy (TEM) and high-resolution TEM (HRTEM). The focus is on post-processing by ECAP (Equal Channel Angular Pressing) and its effects on grain refinement, stacking fault formation and dislocation accumulation. In addition, the strength enhancing role of stacking faults is for the first time quantified. The results show that ECAP can increase the yield strength from 294 to 396 MPa, while the elongation increases from 2.4% to 6%. These results show that ECAP processing offers a new approach for producing AlSi10Mg products with improved strength and ductility.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/849c128082da/41598_2023_43448_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/0e85066a969a/41598_2023_43448_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/905c936f5dd3/41598_2023_43448_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/c72f7f01393e/41598_2023_43448_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/589109be1290/41598_2023_43448_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/cb54045a812f/41598_2023_43448_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/f8254fcaeb8b/41598_2023_43448_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/f60154f326e1/41598_2023_43448_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/25503ee2c4e8/41598_2023_43448_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/b0a18447f098/41598_2023_43448_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/058013ba3baf/41598_2023_43448_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/849c128082da/41598_2023_43448_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/0e85066a969a/41598_2023_43448_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/905c936f5dd3/41598_2023_43448_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/c72f7f01393e/41598_2023_43448_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/589109be1290/41598_2023_43448_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/cb54045a812f/41598_2023_43448_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/f8254fcaeb8b/41598_2023_43448_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/f60154f326e1/41598_2023_43448_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/25503ee2c4e8/41598_2023_43448_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/b0a18447f098/41598_2023_43448_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/058013ba3baf/41598_2023_43448_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e33/10533813/849c128082da/41598_2023_43448_Fig11_HTML.jpg

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本文引用的文献

1
Molecular dynamics simulation on creep-ratcheting behavior of columnar nanocrystalline aluminum.柱状纳米晶铝蠕变棘轮行为的分子动力学模拟
J Mol Graph Model. 2023 Jan;118:108376. doi: 10.1016/j.jmgm.2022.108376. Epub 2022 Nov 11.
2
Microstructural Evolution, Hardness, and Strengthening Mechanisms in SLM AlSi10Mg Alloy Subjected to Equal-Channel Angular Pressing (ECAP).经等通道转角挤压（ECAP）处理的选择性激光熔化（SLM）AlSi10Mg合金的微观结构演变、硬度及强化机制
Materials (Basel). 2021 Dec 10;14(24):7598. doi: 10.3390/ma14247598.
3
Size effect on the deformation mechanisms of nanocrystalline platinum thin films.
尺寸对纳米晶铂薄膜变形机制的影响
Sci Rep. 2017 Oct 16;7(1):13264. doi: 10.1038/s41598-017-13615-6.
4
Dislocation processes in the deformation of nanocrystalline aluminium by molecular-dynamics simulation.通过分子动力学模拟研究纳米晶铝变形中的位错过程。
Nat Mater. 2002 Sep;1(1):45-8. doi: 10.1038/nmat700.